Difference between revisions of "ADSL2MUE"

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* [http://openwrt.org/AR7Port OpenWRT version for AR7 Architecture]
* [http://openwrt.org/AR7Port OpenWRT version for AR7 Architecture]
* [http://www.routertech.org RouterTech 3rd party firmware for AR7 platform]
* [http://www.routertech.org RouterTech 3rd party firmware for AR7 platform]
* [http://www.pcwdld.com/what-is-snmp-and-tutorial Simple Network Management Protocol Wiki]

[[Category: DSL routers]]
[[Category: DSL routers]]

Latest revision as of 20:43, 7 January 2016

Linksys ADSL2MUE is an ADSL2/2+ capable router/modem based on the Texas Instruments AR7 architecture. Marketed in the United Kingdom, France, Australia and a few other countries not including the United States of America.

If you are looking for a modem this might not be what you are looking for. Although advertised as a modem, it is actually a router with some sort of bridging capabilities.

However, as it based on Linux, if you have console access - it is quite possible to use a few standard Linux commands to disable the NAT firewall, define routes and pass the WAN IP to a single connected router by dhcp.

Hardware resources

Based on Texas Instruments AR7 architecture it includes a few other chips on board, such as ethernet and ADSL transformers. TI does not provide with much information about the architecture and answers with a "this is for OEM eyes only" when asked for more information.

This device provides ADSL, Ethernet and USB conectivity only.

  • Ethernet: One on-chip fast Ethernet 10/100 port attached to a transformer from Delta Electronics labeled LF8505 DELTA 0448W.
  • USB: One USB 1.1 port.
  • ADSL: One on-chip adsl port attached to an ADSL2 transformer from Linkcomm Manufacturing labeled LAL0671 LINKCOM 0450. Advertised explicitly as AR7 compatible.
  • On-board RAM memory: One chip of synchronous SDRAM formatted as 1Mx32x4bank module makeing up 128Mbit (16Mbytes) of RAM space. Manufactured by Glink and labeled as GLT51280L16-6TC 412 9P3030902.
  • On-board Flash memory: Four MBytes of memory on a single chip from Macronix Incorporated. Its part numbers is MX29LV320ABTC-90G and the chip is labeled as MX E042469 29LV320ABTC-90G 2K085800A1 TAIWAN.
  • Microcontroller: Texas Instruments AR7RD labeled TNETD7300AGDW 49ZND69 with uilt-in ADSL and Ethernet interfaces.
  • Serial ports: Two serial ports. One of them used as system console at 38400,8,N,1 wired to J1 as described below on this page. Another serial port is present and configured but is unused and looks unwired to any of the pins close to J1.
  • EJTAG interface: EJTAG v2.6 with 14 pins. (Info from epitools debug intefaces and cables). This is wired to JP1 connector, the fourteen pins port right by leds side.

Flash memory addressing

This info might prove useless, but not all addressing range available for flash is used.

  • mtd2 block: from 0x90000000 to 0x90010000 contains on 64 KBytes the PSPBoot binary.
  • mtd3 block: from 0x90010000 to 0x90020000 contains 64KBytes of NVRAM configuration and environment.
  • mtd1 block: from 0x90020000 to 0x900a0000 contains 512 Kbytes of kernel
  • mtd0 block: from 0x900a0000 to 0x90400000 contains 3456 KBytes of squashfs

For Linksys Firmware 4.22 (and probably 4.17) the Kernel and Filesystem can be accessed with an

  • mtd4 block: from 0x90020000 to 0x90400000 logically spanning mtd1 and mtd0

Addressing the flash requires the first seven bits to be 1011 000x, the next tree are meaningless and the other 22 bits walk along the full flash chip (2^22 equals 4MB of Flash mem).

1011 000x   xxmm mmmm   mmmm mmmm   mmmm mmmm

where 1011 000 is the "chip select" for flash mem, x represents any value in binary and m represents a single bit within the real flash address.

Further info from software commands

(psbl) version

Compiled gcc rev: 2.95.3 20010315 (release/MontaVista) [Aug  6 2004 17:48:48]
Built for AR7RD board in Little Endian mode.

Optional modules included (+) or not (-):
 +tibinary -elf -gzip -ffs -tftp -ftp +dhcp +pcapp
cli> product-info 
GLOBAL: Product Info command

Product Information:
Model Number:                             AR7RD
HW Revision:                            Unknown
Serial Number:                             none
USB PID:                                 0x000f
USB VID:                                 0x13b1
Ethernet MAC:                               N/A
DSL MAC:                                    N/A
USB MAC:                                    N/A
USB Host MAC:                               N/A
Software Versions:
Gateway:                                  3.5.0
ATM Driver:                

DSL HAL:                  

DSL Datapump:       Annex A
SAR HAL:                              01.07.02

PDSP Firmware:                            0.49 

Boot loader:                  
cli> shell
Starting /bin/sh
Type exit to return to the CLI

BusyBox v0.61.pre (2004.10.19-18:15+0000) Built-in shell (ash)
Enter 'help' for a list of built-in commands.

# cat proc/tty/driver/serial 
serinfo:1.0 driver:5.05c revision:2001-07-08
0: uart:16550A port:A8610E00 irq:15 baud:2258 tx:15520 rx:323 RTS|DTR
1: uart:16550A port:A8610F00 irq:16 tx:0 rx:0 RTS|DTR
# cat proc/ticfg/env 
ProductID       AR7RD
HWRevision      Unknown
SerialNumber    none
MEMSZ           0x01000000
FLASHSZ         0x00400000
CPUFREQ         150000000
SYSFREQ         125000000
MODETTY0        38400,n,8,1,hw
MODETTY1        38400,n,8,1,hw
MAC_PORT        0
mtd0            0x900a0000,0x90400000
mtd1            0x90020000,0x900a0000
mtd2            0x90000000,0x90010000
mtd3            0x90010000,0x90020000
autoload        1
BOOTCFG         m:f:"mtd1"
USB_VID         0x0451
USB_PID         0x6060
HWA_RNDIS       00:E0:A6:66:41:EB
HWA_HRNDIS      00:E0:A6:66:41:E1
usb_vid         0x13b1
usb_pid         0x000f
usb_prod        Linksys RNDIS Network Adapter
connection0     0
HWA_0           00:12:17:79:8C:D8 
PROMPT          (psbl)

Note the last 6 digits of HWA_0 should be set to the board specific MAC address

Console and JTAG port

|                      J1- Serial Port    |
|                    Pin 4: GND   ----> @ |
|                    Pin 3: TX    ----> @ |
|                    Pin 2: RX    ----> @ |
|              Pin 1: +3.3 volts  ----> @ |
|                                         |
|                      J2 8 pins          |
|                      JP2 14 pins        |
|                                         |
|                      JP1 JTAG           |
|             Vcc +3.3V Pin 14,13         |
|                 N/C   Pin 12,11         |
|                 GND   Pin 10,9  TCK     |        Front of ADSL2MUE
|                 GND   Pin 8,7   TMS     |
|                 GND   Pin 6,5   TDO     |
|                 GND   Pin 4,3   TDI     |
|                 GND   Pin 2,1   TRST    |
|                                         |
|                 Internet                led  Green = GPIO 13, Red = GPIO 9
|                 DSL                     led  Green = GPIO 33
|                 USB                     led  GPIO 12
|                 Ethernet                led  Green = GPIO 15
|      Power, defaults red in Hardware    led  Green = GPIO 7

The console is located on the same edge that the leds are, that is, front-right side of the board. It is labeled J1 and an arrow points to pin 1 on the left, that is, the closest pin to the leds. Voltage reference is 3.3 volts and it is set by default at 38400,8,N,1 (but will revert to 9600,8,N,1 if config mtd3 deleted). Mine already had a connector soldered just like to ones we usually see on computer boards as CPU/NB fan connector.

Pins 1 to 12 of the JTAG port are the same as the WRT54G/GS/GL, but for the HairyDairyMaid passive connector to function the link between VCC (Pin 14) and TRST (Pin 1) is required (with a 100 ohm resistor link in cable).

Software resources

This firmware is based on the MontaVista Linux.

Linux version 2.4.17_mvl21-malta-mips_fp_le (root@mandrake.nctu.edu.tw)
(gcc version 2.95.3 20010315 (release/MontaVista)) #49 Thu Sep 9 18:13:08 EDT 2004

CPU + Memory

# cat /proc/cpuinfo
processor               : 0
cpu model               : MIPS 4KEc V4.8
BogoMIPS                : 149.91
wait instruction        : no
microsecond timers      : yes
extra interrupt vector  : yes
hardware watchpoint     : yes
VCED exceptions         : not available
VCEI exceptions         : not available

RAM partitioning

# cat proc/iomem
00000000-13ffffff : reserved
14000000-1401ffff : System RAM
14020000-14ffffff : System RAM
  14020000-1418ba07 : Kernel code
  1419a300-141b2fff : Kernel data
a8610000-a86107ff : eth0

Filesystems and partitioning

# cat proc/mounts 
/dev/mtdblock/0 / squashfs ro 0 0
none /dev devfs rw 0 0
proc /proc proc rw 0 0
ramfs /var ramfs rw 0 0
# cat /proc/mtd 
dev:    size   erasesize  name
mtd0: 00360000 00010000 "mtd0"
mtd1: 00080000 00010000 "mtd1"
mtd2: 00010000 00002000 "mtd2"
mtd3: 00010000 00010000 "mtd3"

GPL Violation

Partially GPL'd software can be downloaded from the UK office of Linkys at the GPL link show at the Linksys GPL code center.

As many AR7 based devices do, Linksys ADSL2MUE violates GPL license because only partial sources are released. Visit GPL Violations web site for more information on this.

Software features

With the default oficial firmware this device has four modes of operation:

  1. Router with PPPoA over the WAN
  2. Router with PPPoE over the WAN
  3. Router with RFC1483/RFC2684 bridged over the WAN
  4. Bridge with RFC1483/RFC2684 bridged over the WAN

All three router modes NAT support is fair enough for outgoing purposes but will not let you do any port forwarding to the inside.

The only modem capabilities the device shows is called brige mode. This mode interconnects a native ethernet network or an ethernet over USB network with a RFC1484 bridge mode network (ethernet switched over ATM/ADSL).

Hidden software features

Oficial firmware includes a comand line interface that allows for a few more modes of operation. The standard web based GUI allows you to configure RFC2684 bridged mode with LLC or VC encapsulation only, but the CLI allows you to configure RFC2684 routed mode also.

I got into the CLI through the console and after enabling privileges (CLI enable password matches web password - or may be `Admin` with a case sensitive capital A) you can configure the WAN interface as statically managed and set RFC2684 routed as the interface type.

Keep in mind that this hidden feature allows you to use this piece of hardware as a router connected to a routed mode RFC2684 ATM/DSL connection. Still work needs to be done on OpenWrt AR7 port to let this hardware become the modem it claims to be. An experimental Half-Bridge mode script is now available using the extended Linux environment provide in the Routertech 2.3 3rd party firmware.

Command Line Interface (CLI)

      • Note: Firmware released as of before 1/6/2009 contains a massive update that allows many more features through the web front end including port forwarding UPnP and Firewalling (full router capabilities). Logging in by ssh is not so needed now. Jago25 98 07:32, 3 June 2009 (UTC)jago25_98

You can make this modem act as a router (port forwarding) by using the command line interface.

Given that adsl2mue modem internal IP address is

user@linux~$ ssh -l root
root@'s password:
Copyright (c) 2004 Texas Instruments, Inc.
cli> enable
Password: **********
New priv level = 5

typing '?' list available options

You can configure nat table to redirect HTTP traffic to as it is done above with iptables by typing the following commands:
cli# wan
cli(wan)# connection 1
cli(wan connection1)# port forward rule-add name http protocol tcp src-ip src-netmask dst-ip dst-netmask port-start 80 port-end 80 port-map 8080
cli(wan connection1)# apply
cli(wan connection1)# show port-forward
Port Forward Rule List

          Name         Src IP           Dest IP          Start    Protocol
                       Src Mask         Dest Mask        Stop
      01: http      80       TCP
          Enabled    80

Now, you can save your changes:
cli(wan connection1)# save

enjoy ! ...

common menu options:

apply         Apply the current changes to the running system. Does not save the settings to flash
disable       Set privilege level to zero
discard       Discards any pending changes to the system
enable        Change privilege level
exit          Quit the CLI
help          CLI usage help
logoff        Quit the CLI
quit          Quit the CLI
reboot        Reboots the system.
save          Saves any applied changes to flash.
show          Show current information

menu tree:

advanced Modify settings in the advanced menu

 router   Configure router parameters
       rip  Configure RIP Protocol
               authentication  Modify the RIP authentication settings
                       disable  Disable RIP Authentication
                       enable   Enable RIP Authentication
               disable         Disable RIP
               enable          Enable RIP
               protocol        Specify RIP Protocol version support
                       ripv1            RIP version 1
                       ripv1compatible  RIP version 1 Compatible
                       ripv2            RIP Protocol 2
 snmp     Setup SNMP parameters
       agent      Enable/Disable SNMP agent
               disable  Disable SNMP
               enable   Enable SNMP
       community  Configure SMNP community parameters
               clear  Clear a community name entry
                       all    Clear all community name entries
                       1-3  Clear this specific community name entry
               set    Set a SNMP community information
                       1-3  SNMP community entry to change
                               name  Specify a SNMP community name entry
                                       WORD  Community Name
       system     Configure SNMP name, location, and contact info
               contact   Specify contact information for the modem
                       STRING  Contact Info
               location  Specify physical location of the modem
                       STRING  Physical Location
               name      Specify administratively assigned name for the modem
                       STRING  Administratively Assigned Name
       traps      Configure SMNP trap parameters
               clear    Clear a trap entry
                       all    Clear all trap entries
                       1-3  Clear this specific trap entry
               disable  Disable traps
               enable   Enable traps
               set      Set a SNMP trap entry
                       1-3  SNMP trap entry to change
                               HOSTADDR  Trap destination
 sntp     Setup SNTP parameters
       daylight          Setting Daylight feature
       disable           Disable SNTP
       enable            Enable SNTP
       polling-interval  Set the SNTP polling interval
               0-30  Polling interval (min)
       retries           Set the number of SNTP retries
               0-5  Number of retries
       server            Set SNTP servers
               primary  Assign a primary server
       timeout           Set the timeout value
               0-30  Timeout (sec)
       timezone          Set timezone
               GMTN0100  (GMT-01:00) Cape Vade
               GMTN0200  (GMT-02:00) Mid-Atlantic
               GMTN0300  (GMT-03:00) Brasilia, Beunon Aires, Greenland
               GMTN0400  (GMT-04:00) Atlantic Time (US, Canada)
               GMTN0500  (GMT-05:00) Eastern Time (US, Canada)
               GMTN0600  (GMT-06:00) Central America, Central Time (US, Canada)
               GMTN0700  (GMT-07:00) Arizona, Mountain Time (US, Canada)
               GMTN0800  (GMT-08:00) Pacific Time (US, Canada), Tijuana
               GMTN0900  (GMT-09:00) Alaska
               GMTN1000  (GMT-10:00) Hawaii
               GMTN1100  (GMT-11:00) Midway Island
               GMTN1200  (GMT-12:00) International Date Line West
               GMTP0100  (GMT+01:00) Amsterdam, Berlin, Rome, Stockholm, Vienna, Paris
               GMTP0200  (GMT+02:00) Athens, Istanbul, Cairo, Harare, Jerusalem
               GMTP0300  (GMT+03:00) Baghdad, Kuwait, Riyadh, Moscow
               GMTP0400  (GMT+04:00) Muscat
               GMTP0500  (GMT+05:00) Islamabad, Karachi
               GMTP0530  (GMT+05:30) Chennai, Kolkota, Mumbai, New Delhi
               GMTP0600  (GMT+06:00) Dhaka
               GMTP0700  (GMT+07:00) Bangkok, Hanoi, Jakartha
               GMTP0800  (GMT+08:00) Beijing, Kong Kong
               GMTP0900  (GMT+09:00) Tokyo, Seoul
               GMTP1000  (GMT+10:00) Brisbane, Sydney
               GMTP1100  (GMT+11:00) Magadan, Solomon Islands
               GMTP1200  (GMT+12:00) Auckland, Wellington, Fiji

lan Modify settings in the Lan menu

 lan-group  Enter lan group configuration menu
       1-8  lan group number
               access-list  Configures Access Control List
                       disable  Disable Access Control List
                       enable   Enable Access Control List
                       ip       Add IP Address to ACL
                               add    Add IP Address to Access Control List
                                       HOSTADDR  IP Address
                               clear  Deletes all IP Addresses on the ACL
                               del    Delete IP Address from Access Control List
                                       0-15  Associated Index Number for ACL
                       service  Services Enabled/Disabled for ACL on LAN
                               ftp     Enable/Disable ftp protocol
                               snmp    Enable/Disable snmp protocol
                               ssh     Enable/Disable ssh protocol
                               telnet  Enable/Disable telnet protocol
                               tftp    Enable/Disable tftp protocol
                               web     Enable/Disable web protocol
               bridge       Bridge with filtering mechanism
                       filter  Rules to allow/deny frames thrugh bridge
                               clear            Flush Bridge Filter Rules
                               disable          Disable Bridge Filtering Mechanism
                               enable           Enable Bridge Filtering Mechanism
                               management-port  Management Port
                               rule             Bridge Filter Rule
                                       add  Add Bridge Filter Rule
                                               mode  Bridge Filter Mode
                                                       allow  Allow frames matching rule
                                                               src-mac  Source MAC Address
                                                                       STRING  Source MAC Address
                                                       deny   Deny frames matching rule
                                       del  Delete Bridge Filter Rule
               dhcp         Dhcp configuration commands
                       client-dynamic  Configure dynamic LAN clients
                               reserve  Reserve dynamic DHCP address for LAN client
                                       STRING  Enter index number of dynamic LAN client (use 'show dhcp_dynamic' for list)
                       client-static   Configure static LAN clients
                               add    Add static LAN clients
                                       HOSTADDR  Enter static LAN IP address
                               clear  Delete all static LAN clients
                               del    Delete static LAN clients
                       off             Disable DHCP Server/Relay
                       relay           Configure DHCP relay
                               HOSTADDR  Enter DHCP relay IP address
                       server          Enable/Configure DHCP Server/Relay
                               start  follow with starting ip address
                                       HOSTADDR  Enter starting DHCP server IP address
               domain-name  Domain name of the modem
                       STRING  Provide domain name for modem
               host-name    Host name of the modem
                       STRING  Provide host-name for modem
               ip           IP
                       filter  Filter Rules
                               add    Add a Filter Rule
                               clear  Flush all Filter Rules
                               del    Delete a Filter Rule
               management   Modify the management settings
                       interface  Configure Management Interface
                               A.B.C.D  Management IP address
                       type       Modify the management type
                               dynamic    Set this lan group to use dynamic IP settings (DHCP)
                               static     Set this lan group to use static IP settings
                               unmanaged  Set this lan group to be unmanaged
               route        Configure static routes
                               static-add    Add a static route
                               static-clear  Clear all static routes
                               static-del    Delete a static route entry
 port       Configure Ethernet port parameters
       assign  Assign ports to a given lan group
               ap    Wireless Access Point (AP)
                       lan1        Assign to LAN group 1
                       lan2        Assign to LAN group 2
                       lan3        Assign to LAN group 3
                       unassigned  Remove from all LAN groups
               eth0  Ethernet port 0
                       lan1        Assign to LAN group 1
                       lan2        Assign to LAN group 2
                       lan3        Assign to LAN group 3
                       unassigned  Remove from all LAN groups
               usb   USB port
                       lan1        Assign to LAN group 1
                       lan2        Assign to LAN group 2
                       lan3        Assign to LAN group 3
                       unassigned  Remove from all LAN groups
       1-4   Specify port number

product-info Product information
log Set Log Level
shell Go to the system shell
stats List modem stats

 connection  Connection stats
 modem       Modem stats
 network     Network stats

system Modify settings in the system menu

 firewall_nat  Enable Firewall and NAT Service
       disable  Disable
       enable   Enable
 password      Change a privilege level's password. (Password changes take place immediatly.)
       1     view.    User can look at stats and settings. Cannot change any settings.
       2     logger.  User can look at stats and settings. Can change log settings.
       5     admin.   User can look and change all settings
       WORD  new password (if not entered, prompt for password)

voice-nmm Enter the voice NMM command shell


wan Modify settings in the Wan menu

 access-list  Configures Access Control List
       disable  Disable Access Control List
       enable   Enable Access Control List
       ip       Add IP Address to ACL
               add    Add IP Address to Access Control List
               clear  Deletes all IP Addresses on the ACL
               del    Delete IP Address from Access Control List
       service  Services Enabled/Disabled for ACL on LAN
               ftp     Enable/Disable ftp protocol
               snmp    Enable/Disable snmp protocol
               ssh     Enable/Disable ssh protocol
               telnet  Enable/Disable telnet protocol
               tftp    Enable/Disable tftp protocol
               web     Enable/Disable web protocol
 connection   Enter connection configuration menu
       1-8  connection ID number
               atm         Set ATM parameters
                       pvc  Set the ATM PVC parameters
                               0-255  VPI value
                                       0-1023  VCI value
                       qos  Set ATM QoS Parameters
                               cbr  Set QoS CBR class type
                                       0-65534  Peak Cell Rate (cells per second)
                                               cdvt  Set Cell delay variance threshold
                                                       0-65534  Cell delay variance threshold (usecs)
                                               End of CBR command parameters
                               ubr  Set QoS to UBR
                               vbr  Set QoS VBR class type
                                       0-65534  Peak Cell Rate (cells per second)
                                               cdvt  Set Cell delay variance threshold
                                                       0-65534  Cell delay variance threshold (usecs)
                                               mbs   Set Maximum Burst Size
                                                       0-65534  Maximum Burst Size (cells)
                                               scr   Set Sustainable Cell Rate
                                                       0-65534  Sustainable Cell Rate (cells per second)
                                               End of VBR command parameters
               connection  Set the basic connection settings
                       name  set the user friendly name for this connection
                               WORD  user friendly name for this connection
                       type  Set the connection type
                               bridge  set this connection to a bridged mode
                               clip    set this connection to use clip
                               dhcp    set this connection to use a dhcp client
                               off     disable this connection
                               pppoa   set this connection to use pppoa
                               pppoe   set this connection to use pppoe
                               static  set this connection to use a statically assigned IP address
               dmz         Enable/Disable DMZ
                       client-add  Add a LAN IP to DMZ
                               A.B.C.D  Set the LAN IP address
                       disable     Disable DMZ
                       enable      Enable DMZ
               firewall    Enable/Disable Firewall
                       disable  Disable Firewall
                       enable   Enable Firewall
               igmp        Enable/Disable IGMP
                       disable  Disable IGMP
                       enable   Enable IGMP
               ipqos       Enable IP QoS
                       disable       Disable
                       enable        Enable
                       queue         Set Queue Priorities Low + High = 100%
                               low   Set Low Queue Priorities
                               med   Set Medium Queue Priorities
                               End of the IPQoS parameters
                       rule-add      Add a rule for IP QoS
                               dst-ip          Add a destination IP
                               dst-netmask     Add a destination Netmask
                               dst-port-end    Add end port number
                               dst-port-start  Add start port number
                               name            Specify a name for this rule
                               phy-port        LAN Physical Port Number
                               priority        Set Queue Priority for this rule
                               protocol        Add protocol to rule
                               src-ip          Specify a source IP
                               src-netmask     Add a source Netmask
                               src-port-end    Add end port number
                               src-port-start  Add start port numb
                               tos             Add TOS marking
                               End of IPQoS add rule parameters
                       rule-clear    Clear all IPQoS rules
                       rule-del      Delete a IPQoS rule
                               UINT  use: show IPQoS rules to get index number
                       trusted-mode  Required keyword
                               disable  Disable
                               enable   Enable
               nat         Enable/Disable NAT
                       disable  Disable NAT
                       enable   Enable NAT
               port        Access Port Forward settings
                       forward  Access Port Forward settings
                               disable     Disable Port Forwarding
                               enable      Enable Port Forwarding
                               rule-add    Add a Port Forwarding rule
                                       dst-ip       Specify a destination IP
                                               A.B.C.D  Destination IP address
                                       dst-netmask  Specify a destination Netmask
                                               A.B.C.D  Destination Netmask
                                       name         Specify a name for this rule
                                               WORD  Name for this rule
                                       port-end     Specify an end port number
                                               0-65535  Port end number
                                       port-map     Specify a port map number (Change src port to a different dest port)
                                               0-65535  Port map number
                                       port-start   Specify a start port number
                                               0-65535  Port start number
                                       protocol     Specify a protocol to use
                                               any      ANY Protocol
                                               tcp      TCP Protocol
                                               tcp_udp  TCP+UDP Protocol
                                               udp      UDP Protocol
                                       src-ip       Specify a source IP
                                               A.B.C.D  Source IP address. '*' indicates all ip's
                                       src-netmask  Specify a source Netmask
                                               A.B.C.D  Source Netmask
                                       cr         Add the specified Port Forward rule
                               rule-clear  Clear all port forwarding rules
                               rule-del    Delete a port forwarding rule
                                       1-30  entry number. use 'show port-forward' to get index number
               ppp         Set up a PPP Connection
                       authentication   Specify the PPP Authentication parameters
                               password  Specify a PPP password
                                       WORD  PPP Password
                               type      Specify the PPP authentication type
                                       auto  PPP Authentication Type: Auto
                                       chap  PPP Authentication Type: CHAP
                                       pap   PPP Authentication Type: PAP
                               username  Specify a PPP username
                                       Username  PPP User name
                       connection-mode  Set the on-demand or keep-alive connection mode
                               keep-alive  Choose keep-alive mode
                                       time  Specify a keep-alive time
                                               1-100  Keep alive time (minutes)
                               on-demand   Choose on-demand mode
                                       idle-timeout  Specify an idle-timeout
                                               0-60000  Idle time before PPP disconnects (seconds)
                       debug            Choose the debug mode for PPP
                               disable  Disable debug capability
                               enable   Enable debug capability
                       default-route    Select whether PPP sets the default route
                               disable  PPP will not set the default route
                               enable   PPP will set the default route
                       encapsulation    Set encapsulation mode for PPP
                               llc  Set LLC encapsulation
                               vc   Set VC MUX encapsulation
                       mtu              Set MTU size for PPP
                               128-1500  MTU (Bytes)
               route       Configure static routes
                       static-add    Add a static route
                               A.B.C.D  Destination IP address
                       static-clear  Clear all static routes
                       static-del    Delete a static route entry
                               1-30  entry number. use 'show static routes' to get index number
               show        Show current configuration
                       all           Show all subcontexts
                       atm           Show the atm settings
                       connection    Show the basic connection settings
                       dns           Show the Static DNS entries
                       ip-qos        Show IP QoS configuration
                       port-forward  Show the port forwarding rules
                       ppp           Show the PPP connection settings
                       route         Show route information
                       voice-config  Show Voice configuration
               upnp        Enable/Disable UPNP
                       disable  Disable UPNP
                       enable   Enable UPNP
               voice       Enable Voice
                       disable  Disable
                       enable   Enable
 modem        Modem test
       test  Required keyword
               0-255  VPI value
                       0-1023  VCI value
                               f4end  F4 flows End to End
                               f4seg  F4 flows Segment
                               f5end  F5 flows End to End
                               f5seg  F5 flows Segment
 modulation   Set the DSL modulation
       gdmt   Modulation Type = GDMT
       glite  Modulation Type = GLITE
       mmode  Modulation Type = Multi-Mode
       t1413  Modulation Type = T1413
       cr   Accept the modulation type

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