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This feature module provides software support for telephone return in a cable-routed system. Telephone return in a cable environment is that part of the cable network which connects the subscriber's cable modem with the headend cable router over standard phone lines (as opposed to an all-cable network connecting the headend router with cable modems).
Telephone (or telco) return allows Multi-Service Operators (MSOs) to support their cable subscribers without replacing existing hardware.
For more information on cable routers, see:
Cisco uBR7200 Series
None
Perform the following tasks to configure the features discussed in this document:
Step 1 Boot the uBR7200 with the Telco-return bootflash image.
Step 2 Verify uBR7200 output power level and downstream/upstream transmission.
Step 3 Boot the Telco-return-return modems and verify modem registration.
Step 4 Verify that the uBR7200 can ping the Telco-return modems.
To verify that the subscriber modem can log into the CMTS in telco-return mode:
Step 1 Reboot the subscriber modem.
Step 2 Allow the subscriber modem to complete telco registration (will take several minutes).
Step 3 Enter the show cable modem command on the uBR cable router to verify that the subscriber modem is shown in the list. The letter "T" indicates that a modem is a telco-return modem.
ubr7246-1#show cable modem
Interface Prim Online Timing Rec QoS CPE IP address MAC address
Sid State Offset Power
Cable4/0/U0 2 online 2848 -0.50 5 1 10.2.0.3 0010.7b6b.53d5
Cable4/0/T 3 offline 0 0.00 2 1 10.2.0.101 0020.4001.4af6
Cable4/0/U0 4 online 2852 -0.75 5 1 10.2.0.6 0010.7b6b.7255
Cable4/0/U0 5 online 2850 0.25 5 1 10.2.0.7 0010.7b6b.5669
Cable4/0/U0 6 online 2851 0.00 2 1 10.2.0.4 0010.7b6b.53c9
Cable4/0/T 7 offline 0 0.00 2 0 10.2.0.102 0020.4001.4b32
Step 4 Ping the subscriber modem from the uBR cable router to ensure the uBR cable router receives the echo reply packets.
The following example shows how to configure the cable router interface to support telco return:
#cable telco-return enable ubr7223#conf t Enter configuration commands, one per line. End with CNTL/Z. ubr7223(config)#int c2/0 ubr7223(config-if)#cable telco-return spd 1 factory-default ubr7223(config-if)#cable telco-return spd 1 phonenum 8005551212 ubr7223(config-if)#cable telco-return spd 1 phonenum 4085551212 ubr7223(config-if)#cable telco-return spd 1 phonenum 6505551212 ubr7223(config-if)#cable telco-return spd 1 service-provider norcal ubr7223(config-if)#cable telco-return spd 1 dhcp-server 172.172.172.172 ubr7223(config-if)#cable telco-return spd 1 username joe ubr7223(config-if)#cable telco-return spd 1 password password ubr7223(config-if)#cable telco-return spd 1 dhcp-authenticate ubr7223(config-if)#cable telco-return spd 1 threshold 5 ubr7223(config-if)#cable telco-return spd 1 ppp-authenticate both ubr7223(config-if)#cable telco-return spd 1 manual-dial ubr7223(config-if)#cable telco-return spd 1 dial-timer 7200
This section documents new or modified commands. All other commands used with this feature are documented in the Cisco IOS Release 12.0 command references:
To enable telephone return support, use the cable telco-return enable interface configuration command. Use the no form of this command to disable this feature:
cable telco-return enableThis command has no arguments or keywords.
No default behavior or values.
Interface Configuration
| Release | Modification |
|---|---|
12.0(4)XI | This command was introduced. |
ubr7233(config-if)#cable telco-return enable
| Command | Description |
Defines the interval for sending Telephony Channel Descriptor (TCD) and Termination System Information (TSI) messages. |
To specify the intervals for sending TCD enrollment messages and TSI messages, use the cable telco-return interval interface configuration command. Use the no form of this command to set the time interval to the default:
cable telco-return interval seconds
seconds | Specifies the number of seconds for TCD or TSI messages. Valid range is from 2 to 60 seconds. |
2 seconds
Interface Configuration
| Release | Modification |
|---|---|
12.0(4)XI | This command was introduced. |
ubr7223(config-if)#cable telco-return interval 40
| Command | Description |
Enables or disables the telco return feature. |
To set the DHCP Authenticate parameter in TCD messages as TRUE (1), which specifies the DHCP server that must be used, use the cable telco-return spd dhcp-authenticate interface configuration command. Use the no form of this command to set the DHCP Authenticate parameter to the default value and remove the parameter from subsequent TCD messages:
cable telco-return spd number dhcp-authenticate
spd number | Specifies the SPD number. |
FALSE (0)
Interface Configuration
| Release | Modification |
|---|---|
12.0(4)XI | This command was introduced. |
The DHCP Authenticate parameter, which is an optional parameter, is expressed as a boolean value.
ubr7223(config-if)#cable telco-return spd 2 dhcp-authenticate
| Command | Description |
cable telco-return spd dhcp-server
| Specifies the IP address of the DHCP server parameter in TCD messages. |
cable telco-return spd dial-timer
| Specifies the Demand Dial Timer TCD parameter for TCD messages. |
cable telco-return spd factory-default | Indicates the factory default service provider descriptor (SPD) used by cable modems. |
cable telco-return spd ppp-authenticate | Specifies the PPP Authentication parameter in TCD messages. |
cable telco-return spd phonenum
| Specifies the Telephone Numbers parameter in TCD messages. |
cable telco-return spd threshold
| Specifies the Connection Attempt Threshold parameter for TCD messages. |
To specify the IP address of the DHCP server parameter in TCD messages, use the cable telco-return spd dhcp-server interface configuration command. Use the no form of this command to set the default value and remove the parameter from subsequent TCD messages:
cable telco-return spd number dhcp-server ip address
spd number | Specifies the SPD number. |
ip address | Specifies the IP address of the DHCP server. |
0
Interface Configuration
| Release | Modification |
|---|---|
12.0(4)XI | This command was introduced. |
ubr7223(config-if)#cable telco-return spd 2 dhcp-server 206.44.207.255
| Command | Description |
cable telco-return spd dhcp-authenticate | Specifies the DHCP Authenticate parameter in TCD messages as TRUE. |
cable telco-return spd dial-timer | Specifies the Demand Dial Timer TCD parameter for TCD messages. |
cable telco-return spd factory-default
| Indicates the factory default service provider descriptor (SPD) used by cable modems. |
cable telco-return spd ppp-authenticate | Specifies the PPP Authentication parameter in TCD messages. |
cable telco-return spd phonenum
| Specifies the Telephone Numbers parameter in TCD messages. |
cable telco-return spd threshold
| Specifies the Connection Attempt Threshold parameter for TCD messages. |
To specify the Demand Dial Timer TCD parameter for TCD messages, use the cable telco-return spd dial-timer EXEC command. Use the no form of this command to set the default value and remove the dial-timer parameter from subsequent TCD messages:
cable telco-return spd number dial-timer seconds
spd number | Specifies the SPD number. |
dial-timer seconds | Specifies the number of seconds of the Demand Dial Timer parameter for TCD messages. Valid range is from 0 to 4294967295. |
0
Interface Configuration
| Release | Modification |
|---|---|
12.0(4)XI | This command was introduced. |
ubr7223(config-if)#cable telco-return spd 2 dial-timer 7200
| Command | Description |
cable telco-return spd dhcp-authenticate | Specifies the DHCP Authenticate parameter in TCD messages as TRUE. |
cable telco-return spd dhcp-server
| Specifies the IP address of the DHCP server parameter in TCD messages. |
cable telco-return spd factory-default
| Indicates the factory default service provider descriptor (SPD) used by cable modems. |
cable telco-return spd ppp-authenticate | Specifies the PPP Authentication parameter in TCD messages. |
cable telco-return spd phonenum
| Specifies the Telephone Numbers parameter in TCD messages. |
cable telco-return spd threshold
| Specifies the Connection Attempt Threshold parameter for TCD messages. |
To indicate the service provider descriptor (SPD) used by cable modems during the factory default procedure, use the cable telco-return spd factory-default interface configuration command. Use the no form of this command to disable this feature:
cable telco-return spd number factory-default
spd number | Specifies the SPD number. |
No default behavior or values.
Interface Configuration
| Release | Modification |
|---|---|
12.0(4)XI | This command was introduced. |
The SPD specified is the factory default SPD.
ubr7223(config-if)#cable telco-return spd 2 factory-default
| Command | Description |
cable telco-return spd dhcp-authenticate | Specifies the DHCP Authenticate parameter in TCD messages as TRUE. |
cable telco-return spd dhcp-server
| Specifies the IP address of the DHCP server parameter in TCD messages. |
cable telco-return spd dial-timer
| Specifies the Demand Dial Timer TCD parameter for TCD messages. |
cable telco-return spd factory-default
| Indicates the factory default service provider descriptor (SPD) used by cable modems. |
cable telco-return spd ppp-authenticate | Specifies the PPP Authentication parameter in TCD messages. |
cable telco-return spd phonenum
| Specifies the Telephone Numbers parameter in TCD messages. |
cable telco-return spd threshold
| Specifies the Connection Attempt Threshold parameter for TCD messages. |
To specify the manual dial parameter in TCD messages, use the cable telco-return spd manual-dial interface configuration command. Use the no form of this command to remove the parameter from subsequent TCD messages:
cable telco-return spd number manual-dial
spd number | Specifies the SPD number. |
No default behavior or values.
Interface Configuration
| Release | Modification |
|---|---|
12.0(4)XI | This command was introduced. |
ubr7223(config-if)#cable telco-return spd 1 manual-dial
| Command | Description |
cable telco-return spd username | Specifies the Login Username parameter in TCD messages. |
cable telco-return password | Specifies the Login Password parameter in TCD messages. |
cable telco-return spd radius-realm | Specifies the RADIUS Realm parameter in TCD messages. |
To specify the Login Password parameter in TCD messages, use the cable telco-return spd password interface configuration command. Use the no form of this command to remove the parameter from subsequent TCD messages:
cable telco-return spd number password string
spd number | Specifies the SPD number. |
string | Specifies the login password. |
No default behavior or values.
Interface Configuration
| Release | Modification |
|---|---|
12.0(4)XI | This command was introduced. |
ubr7223(config-if)#cable telco-return spd 2 password 9JwoKd7
| Command | Description |
cable telco-return service- provider | Specifies the Service Provider Name parameter in TCD messages. |
cable telco-return spd username | Specifies the Login Username parameter in TCD messages. |
cable telco-return spd radius-realm | Specifies the RADIUS Realm parameter in TCD messages. |
To specify the Telephone Numbers parameter in TCD messages, use the cable telco-return spd phonenum interface configuration command. Use the no form of this command to delete any or all previously entered telephone numbers.
cable telco-return spd number phonenum string
spd number | Specifies the SPD number. |
string | Specifies the telephone number to be used by the Telephone Numbers parameter in TCD messages. |
No default behavior or values.
Interface Configuration
| Release | Modification |
|---|---|
12.0(4)XI | This command was introduced. |
You can repeat this command to enter up to three telephone numbers that are mapped to the Telephone Numbers parameters (in TCD messages). The phone numbers appear as Phone Number 1, Phone Number 2, and Phone Number 3 in the order in which you enter them.
ubr7223(config-if)#cable telco-return spd 2 phonenum 9255551212
| Command | Description |
cable telco-return spd dhcp-authenticate | Specifies the DHCP Authenticate parameter in TCD messages as TRUE. |
cable telco-return spd dhcp-server
| Specifies the IP address of the DHCP server parameter in TCD messages. |
cable telco-return spd dial-timer
| Specifies the Demand Dial Timer TCD parameter for TCD messages. |
cable telco-return spd factory-default
| Indicates the factory default service provider descriptor (SPD) used by cable modems. |
cable telco-return spd ppp-authenticate | Specifies the PPP Authentication parameter in TCD messages. |
cable telco-return spd threshold
| Specifies the Connection Attempt Threshold parameter for TCD messages. |
To specify the PPP Authentication parameter in TCD messages, use the cable telco-return spd ppp-authenticate EXEC command. Use the no form of this command to remove the parameter from subsequent TCD messages:
cable telco-return spd number ppp-authenticate [both | chap | pap]
spd number | Specifies the SPD number. |
both | Specifies PAP and CHAP authentication. |
chap | Specifies CHAP authentication. |
pap | Specifies PAP authentication. |
No default behavior or values.
Interface Configuration
| Release | Modification |
|---|---|
12.0(4)XI | This command was introduced. |
ubr7223(config-if)#cable telco-return spd 2 ppp-authenticate chap
| Command | Description |
cable telco-return spd dhcp-authenticate | Specifies the DHCP Authenticate parameter in TCD messages as TRUE. |
cable telco-return spd dhcp-server
| Specifies the IP address of the DHCP server parameter in TCD messages. |
cable telco-return spd dial-timer
| Specifies the Demand Dial Timer TCD parameter for TCD messages. |
cable telco-return spd factory-default
| Indicates the factory default service provider descriptor (SPD) used by cable modems. |
cable telco-return spd phonenum
| Specifies the Telephone Numbers parameter in TCD messages. |
cable telco-return spd threshold
| Specifies the Connection Attempt Threshold parameter for TCD messages. |
To specify the RADIUS Realm service provider descriptor (SPD) parameter in TCD messages, use the cable telco-return spd radius-realm interface configuration command. Use the no form of this command to remove the parameter from subsequent TCD messages:
cable telco-return spd number radius-realm string
spd number | Specifies the SPD number. |
string | Specifies the RADIUS Realm name. |
No default behavior or values.
Interface Configuration
| Release | Modification |
|---|---|
12.0(4)XI | This command was introduced. |
ubr7223(config-if)#cable telco-return spd radius-realm sunol
| Command | Description |
cable telco-return service- provider | Specifies the Service Provider Name parameter in TCD messages. |
cable telco-return spd username | Specifies the Login Username parameter in TCD messages. |
cable telco-return password | Specifies the Login Password parameter in TCD messages. |
To specify the Service Provider Name parameter in TCD messages, use the cable telco-return service-provider interface configuration command. Use the no form of this command to remove the parameter from subsequent TCD messages:
cable telco-return spd number service-provider string
spd number | Specifies the SPD number. |
string | Specifies the service provider name. |
No default behavior or values.
Interface Configuration
| Release | Modification |
|---|---|
12.0(4)XI | This command was introduced. |
ubr7223(config-if)#cable telco-return spd 2 service-provider san_jose
| Command | Description |
cable telco-return spd username | Specifies the Login Username parameter in TCD messages. |
cable telco-return password | Specifies the Login Password parameter in TCD messages. |
cable telco-return spd radius-realm | Specifies the RADIUS Realm parameter in TCD messages. |
To specify the Connection Attempt Threshold parameter for TCD messages, use the cable telco-return spd threshold interface configuration command. Use the no form of this command to set the default threshold:
cable telco-return spd number threshold number
spd number | Specifies the SPD number. |
threshold number | Specifies the connection attempt threshold. Valid range is from 1 to 255. |
1
Interface Configuration
| Release | Modification |
|---|---|
12.0(4)XI | This command was introduced. |
ubr7223(config-if)#cable telco-return spd 2 threshold 200
| Command | Description |
cable telco-return spd dhcp-authenticate | Specifies the DHCP Authenticate parameter in TCD messages as TRUE. |
cable telco-return spd dhcp-server
| Specifies the IP address of the DHCP server parameter in TCD messages. |
cable telco-return spd dial-timer
| Specifies the Demand Dial Timer TCD parameter for TCD messages. |
cable telco-return spd factory-default
| Indicates the factory default service provider descriptor (SPD) used by cable modems. |
cable telco-return spd ppp-authenticate | Specifies the PPP Authentication parameter in TCD messages. |
cable telco-return spd phonenum
| Specifies the Telephone Numbers parameter in TCD messages. |
To specify the Login Username parameter in TCD messages, use the cable telco-return spd username interface configuration command. Use the no form of this command to remove the parameter from subsequent TCD messages:
cable telco-return spd number username string
spd number | Specifies the SPD number. |
string | Specifies the login username. |
No default behavior or values.
Interface Configuration
| Release | Modification |
|---|---|
12.0(4)XI | This command was introduced. |
ubr7223(config-if)#cable telco-return spd 3 username sandy
| Command | Description |
cable telco-return service- provider | Specifies the Service Provider Name parameter in TCD messages. |
cable telco-return password | Specifies the Login Password parameter in TCD messages. |
cable telco-return spd radius-realm | Specifies the RADIUS Realm parameter in TCD messages. |
This section documents new or modified commands. All other commands used with this feature are documented in the Cisco IOS Release 12.0 command references.
To display debug messages for telco-return events, use the debug cable telco-return EXEC command. Use the no form of this command to disable debugging output.
[no] debug cable telco returnThis command has no arguments or keywords.
Debugging for telco-return events is not enabled.
| Release | Modification |
|---|---|
12.0(4)XI | This command was introduced. |
CMTS-ubr7223#debug cable telco-return CMTS telco-return debugging is on
| Command | Description |
Displays debug messages for telco-return events. |
To display debug messages for telco-return events, use the debug cable telco-return msg EXEC command. Use the no form of this command to disable debugging output.
[no] debug cable telco-return msgThis command has no arguments or keywords.
Debugging for telco-return messages is not enabled.
| Release | Modification |
|---|---|
12.0(4)XI | This command was introduced. |
ubr7223#debug cable telco-return msg CMTS telco-return msg debugging is on
| Command | Description |
Displays debug messages for telco-return events. |
Posted: Mon Jul 26 19:29:44 PDT 1999
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