Table Of Contents
Telephone Return for the Cisco uBR7200 Series Cable Router
Verifying Telco Return Configuration
cable telco-return spd dhcp-authenticate
cable telco-return spd dhcp-server
cable telco-return spd dial-timer
cable telco-return spd factory-default
cable telco-return spd manual-dial
cable telco-return spd password
cable telco-return spd phonenum
cable telco-return spd ppp-authenticate
cable telco-return spd radius-realm
cable telco-return spd service-provider
cable telco-return spd threshold
cable telco-return spd username
Telephone Return for the Cisco uBR7200 Series Cable Router
Feature Overview
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).
Benefits
Telephone (or telco) return allows Multi-Service Operators (MSOs) to support their cable subscribers without replacing existing hardware.
Related Documents
For more information on cable routers, see:
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Voice, Video, and Home Applications Configuration Guide
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Supported Platforms
Cisco uBR7200 Series
Supported MIBs and RFCs
MIBs
None
RFCs
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Configuration Tasks
Perform the following tasks to configure the features discussed in this document:
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Configuring Telco Return
Step 1
Step 2
Step 3
Step 4
Verifying Telco Return Configuration
To verify that the subscriber modem can log into the CMTS in telco-return mode:
Step 1
Step 2
Step 3
ubr7246-1#show cable modemInterface Prim Online Timing Rec QoS CPE IP address MAC addressSid State Offset PowerCable4/0/U0 2 online 2848 -0.50 5 1 10.2.0.3 0010.7b6b.53d5Cable4/0/T 3 offline 0 0.00 2 1 10.2.0.101 0020.4001.4af6Cable4/0/U0 4 online 2852 -0.75 5 1 10.2.0.6 0010.7b6b.7255Cable4/0/U0 5 online 2850 0.25 5 1 10.2.0.7 0010.7b6b.5669Cable4/0/U0 6 online 2851 0.00 2 1 10.2.0.4 0010.7b6b.53c9Cable4/0/T 7 offline 0 0.00 2 0 10.2.0.102 0020.4001.4b32Step 4
Configuration Examples
The following example shows how to configure the cable router interface to support telco return:
#cable telco-return enableubr7223#conf tEnter configuration commands, one per line. End with CNTL/Z.ubr7223(config)#int c2/0ubr7223(config-if)#cable telco-return spd 1 factory-defaultubr7223(config-if)#cable telco-return spd 1 phonenum 8005551212ubr7223(config-if)#cable telco-return spd 1 phonenum 4085551212ubr7223(config-if)#cable telco-return spd 1 phonenum 6505551212ubr7223(config-if)#cable telco-return spd 1 service-provider norcalubr7223(config-if)#cable telco-return spd 1 dhcp-server 172.172.172.172ubr7223(config-if)#cable telco-return spd 1 username joeubr7223(config-if)#cable telco-return spd 1 password passwordubr7223(config-if)#cable telco-return spd 1 dhcp-authenticateubr7223(config-if)#cable telco-return spd 1 threshold 5ubr7223(config-if)#cable telco-return spd 1 ppp-authenticate bothubr7223(config-if)#cable telco-return spd 1 manual-dialubr7223(config-if)#cable telco-return spd 1 dial-timer 7200Command Reference
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:
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cable telco-return enable
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 enable
no cable telco-return enableSyntax Description
This command has no arguments or keywords.
Defaults
No default behavior or values.
Command Modes
Interface Configuration
Command History
Examples
ubr7233(config-if)#cable telco-return enableRelated Commands
Defines the interval for sending Telephony Channel Descriptor (TCD) and Termination System Information (TSI) messages.
cable telco-return interval
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
no cable telco-return intervalSyntax Description
seconds
Specifies the number of seconds for TCD or TSI messages. Valid range is from 2 to 60 seconds.
Defaults
2 seconds
Command Modes
Interface Configuration
Command History
Examples
ubr7223(config-if)#cable telco-return interval 40Related Commands
cable telco-return spd dhcp-authenticate
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
no cable telco-return spd dhcp-authenticateSyntax Description
Defaults
FALSE (0)
Command Modes
Interface Configuration
Command History
Usage Guidelines
The DHCP Authenticate parameter, which is an optional parameter, is expressed as a boolean value.
Examples
ubr7223(config-if)#cable telco-return spd 2 dhcp-authenticateRelated Commands
cable telco-return spd dhcp-server
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
no cable telco-return spd dhcp-serverSyntax Description
Defaults
0
Command Modes
Interface Configuration
Command History
Examples
ubr7223(config-if)#cable telco-return spd 2 dhcp-server 206.44.207.255Related Commands
cable telco-return spd dial-timer
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
no cable telco-return spd dial-timerSyntax Description
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.
Defaults
0
Command Modes
Interface Configuration
Command History
Examples
ubr7223(config-if)#cable telco-return spd 2 dial-timer 7200Related Commands
cable telco-return spd factory-default
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
no cable telco-return spdSyntax Description
Defaults
No default behavior or values.
Command Modes
Interface Configuration
Command History
Usage Guidelines
The SPD specified is the factory default SPD.
Examples
ubr7223(config-if)#cable telco-return spd 2 factory-defaultRelated Commands
cable telco-return spd manual-dial
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
no cable telco-return spd number manual-dialSyntax Description
Defaults
No default behavior or values.
Command Modes
Interface Configuration
Command History
Examples
ubr7223(config-if)#cable telco-return spd 1 manual-dialRelated Commands
cable telco-return spd password
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
no cable telco-return spd passwordSyntax Description
Defaults
No default behavior or values.
Command Modes
Interface Configuration
Command History
Examples
ubr7223(config-if)#cable telco-return spd 2 password 9JwoKd7Related Commands
cable telco-return spd phonenum
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
no cable telco-return spd number phonenumSyntax Description
spd number
Specifies the SPD number.
string
Specifies the telephone number to be used by the Telephone Numbers parameter in TCD messages.
Defaults
No default behavior or values.
Command Modes
Interface Configuration
Command History
Usage Guidelines
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.
Examples
ubr7223(config-if)#cable telco-return spd 2 phonenum 9255551212Related Commands
cable telco-return spd ppp-authenticate
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]
no cable telco-return spd ppp-authenticateSyntax Description
spd number
Specifies the SPD number.
both
Specifies PAP and CHAP authentication.
chap
Specifies CHAP authentication.
pap
Specifies PAP authentication.
Defaults
No default behavior or values.
Command Modes
Interface Configuration
Command History
Examples
ubr7223(config-if)#cable telco-return spd 2 ppp-authenticate chapRelated Commands
cable telco-return spd radius-realm
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
no cable telco-return spd number radius-realmSyntax Description
Defaults
No default behavior or values.
Command Modes
Interface Configuration
Command History
Examples
ubr7223(config-if)#cable telco-return spd radius-realm sunolRelated Commands
cable telco-return spd service-provider
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
no cable telco-return spd number service-providerSyntax Description
Defaults
No default behavior or values.
Command Modes
Interface Configuration
Command History
Examples
ubr7223(config-if)#cable telco-return spd 2 service-provider san_joseRelated Commands
cable telco-return spd threshold
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
no cable telco-return spd thresholdSyntax Description
spd number
Specifies the SPD number.
threshold number
Specifies the connection attempt threshold. Valid range is from 1 to 255.
Defaults
1
Command Modes
Interface Configuration
Command History
Examples
ubr7223(config-if)#cable telco-return spd 2 threshold 200Related Commands
cable telco-return spd username
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
no cable telco-return spd number usernameSyntax Description
Defaults
No default behavior or values.
Command Modes
Interface Configuration
Command History
Examples
ubr7223(config-if)#cable telco-return spd 3 username sandyRelated Commands
Debug Commands
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.
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debug cable telco-return
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 return
Syntax Description
This command has no arguments or keywords.
Defaults
Debugging for telco-return events is not enabled.
Command History
Examples
CMTS-ubr7223#debug cable telco-returnCMTS telco-return debugging is onRelated Commands
debug telco-return msg
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 msg
Syntax Description
This command has no arguments or keywords.
Defaults
Debugging for telco-return messages is not enabled.
Command History
Examples
ubr7223#debug cable telco-return msgCMTS telco-return msg debugging is onRelated Commands
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