Cisco 1700 Series Modular Access Routers

Table Of Contents

4-Port FXS/DID Voice Interface Card Support on the Cisco 1751 and Cisco 1760 Routers

Related Documents

Supported Hardware

VIC-4FXS/DID

Restrictions

Prerequisites

Configuring VIC-4FXS/DID

Verification Example

Obtaining Documentation

World Wide Web

Documentation CD-ROM

Ordering Documentation

Documentation Feedback

Obtaining Technical Assistance

Cisco.com

Technical Assistance Center

Cisco TAC Web Site

Cisco TAC Escalation Center

4-Port FXS/DID Voice Interface Card Support on the Cisco 1751 and Cisco 1760 Routers

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This document describes the support for 4-port Foreign Exchange Station/Direct Inward Dialing (FXS/DID) voice interface card (VIC) on the Cisco 1751 and Cisco 1760 routers.

The Cisco 1751 router can support three 4-port FXS/DID VICs, up to a maximum of four DID ports. The Cisco 1760 router can support four 4-port FXS/DID VICs, up to a maximum of eight DID ports.

For last-minute updates to this configuration note, refer to the following documentation websites:

•Cisco 1751 router

http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/1700/1751/index.htm

•Cisco 1760 router

http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/1700/1760/index.htm

This document contains the following sections:

•Related Documents

•Supported Hardware

•Obtaining Documentation

•Obtaining Technical Assistance

Related Documents

For additional information about installing and configuring the Cisco 17xx routers, go to the http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/1700/ website and refer to the following documentations:

•Cisco 17xx Routers Hardware Installation Guide—provides information on installing the Cisco 17xx routers.

•Quick Start Guide - Setting up the Cisco 17xx Routers—provides information for quick installation of the Cisco 17xx routers.

•Cisco 17xx Routers Software Configuration Guide—provides sample networks and router configurations for the Cisco 17xx routers.

•Cisco IOS Release 12.2 Configuration Guides and Command References—provide IOS commands and configurations for your router.

•Configuration Notes for Cisco 1700 Series Routers—provides configuration information on additional features supported on the Cisco 17xx routers.

Supported Hardware

The following new VIC is supported on the Cisco 1751 and Cisco 1760 routers:

•VIC-4FXS/DID

VIC-4FXS/DID

The 4-port FXS/DID VIC provides both FXS and DID functionality on a single VIC. You can select either FXS or DID mode on a port-by-port basis. The default mode is FXS.

An FXS voice port connects directly to a standard telephone, fax machine, private branch exchange (PBX), or a similar device; the voice port supplies ring, voltage, and dial tone to the station only in loop-start signaling mode.

DID is a service offered by telephone companies that enable callers to dial directly to an extension on a PBX without the assistance of an operator or automated call attendant. This service makes use of DID trunks, which forward only the last three to five digits of a phone number to the PBX. If, for example, a company has a PBX with extensions 555-1000 to 555-1999, and a caller dials 555-1234, the local central office (CO) forwards 234 to the PBX. The PBX then rings extension 234. This entire process is transparent to the caller. In DID mode, a voice-enabled Cisco 1751 router or Cisco 1760 router can receive calls from a DID trunk and connect the caller to the appropriate extension. Outgoing calls are not allowed on DID voice ports. If an outgoing call is attempted, the caller will get a fast busy signal. Dial tone is not present on DID voice ports.

Ground-start signaling does not provide a dial tone.

Restrictions

A 4-port FXS/DID VIC can be configured with the following restrictions:

•Supports only four active DID ports on the Cisco 1751 router and eight active DID ports on the Cisco 1760 router. Once this limit is reached, the user cannot configure any more ports in DID mode. The rest of the ports are available for FXS mode.

•The following restrictions apply when you connect external devices to the 4-port FXS/DID VIC:

–A maximum of five ringer equivalence number (REN) loads can be supported on each voice port.

–A maximum of eight REN loads can be supported on each 4-port FXS/DID VIC.

–A maximum of 20 REN loads can be supported on each Cisco 1751 and Cisco 1760 router. If the total REN load on the router exceeds 20, the calling party will hear a ring back but the called party's telephone will not ring until the router has sufficient REN available. In this scenario, caller ID information may be lost.

REN is a measure of the alternating current (AC) load that a device places on a voice port while ringing. The REN is typically listed on each device. If you connect multiple telephones, modems, or fax devices to a voice port, the REN load is the sum of the REN values of all the connected devices.

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Note It is recommended that the user configure the REN value if the total REN load of all the connected devices on each voice port is greater than one REN. See the "Configuring VIC-4FXS/DID" section for instructions on how to configure the REN value of the connected device.

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Prerequisites

The following hardware, software, and basic configurations are required to support FXS and DID:

•Install the required Cisco IOS release.

•Obtain DID service from your service provider.

•Establish a working network.

•Complete your company's dial plan.

•Establish a working telephony network based on your company's dial plan.

•Install the VIC-4FXS/DID card. For more information on how to install this card, see the Update to the Cisco Interface Cards Hardware Installation Guide.

•Install at least one other WAN interface card to provide the connection to the LAN or WAN.

Configuring VIC-4FXS/DID

FXS is the default mode on the 4-port FXS/DID VIC. For information on how to configure the FXS ports, refer to the Cisco 17xx Routers Software Configuration Guide. (See the "Related Documents" section.)

To change the mode to DID and configure the voice port for DID, follow these steps:

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Note Not all the commands required to configure voice ports are presented here. To learn more about DID voice-port configuration, refer to the Cisco 17xx Routers Software Configuration Guide.

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	Command	Purpose
Step 1	Router# configure terminal	Enters global configuration mode.
Step 2	Router(config)# voice-port slot/port	Enters voice-port configuration mode.
Step 3	Router (config-voiceport)# ren {1 | 3| 5}	(Optional.) This command sets the total REN load for all connected devices on the voice port. Default value is 1. A value of five REN loads is the maximum you can configure on each voice port. If the REN value that applies to your device is not available in the command choices, then configure the next available higher REN value.
Step 4	Router (config-voiceport)# signal did {immediate | wink-start | delay-dial}	This command enables DID on the voice port: •immediate if the voice port must use the immediate start protocol. •wink-start if the voice port must use the wink start protocol. •delay-dial if the voice port must use the delay start protocol.
Step 5	Router(config-voiceport)# timing wait-wink milliseconds	(Optional; wink-start ports only.) This command sets the maximum time to wait for wink signaling after an outgoing seizure is sent.
Step 6	Router(config-voiceport)# timing wink-wait milliseconds	(Optional; wink-start ports only.) This command sets the maximum time to wait before sending a wink signal after an incoming seizure is detected.
Step 7	Router(config-voiceport)# timing wink-duration milliseconds	(Optional; wink-start ports only.) This command sets the duration of a wink-start signal.
Step 8	Router(config-voiceport)# timing delay-duration milliseconds	(Optional; delay-dial ports only.) This command sets the duration of the delay signal.
Step 9	Router(config-voiceport)# timing delay-start milliseconds	(Optional; delay-dial ports only.) This command sets the delay interval after an incoming seizure is detected.

Verification Example

The following sections provide examples of voice port verification in FXS and DID mode.

FXS Mode

Enter the show voice port command to verify that the voice port is in FXS mode:

router_1751# show voice port 2/2

Foreign Exchange Station with Direct Inward Dialing (FXS-DID) 2/2 Slot is 0, Sub-unit is 
2, Port is 2

 Type of VoicePort is FXS  VIC-4DID

 Operation State is DORMANT

 Administrative State is UP

 No Interface Down Failure

 Description is not set

 Noise Regeneration is enabled

 Non Linear Processing is enabled

 Non Linear Mute is disabled

 Non Linear Threshold is -21 dB

 Music On Hold Threshold is Set to -38 dBm

 In Gain is Set to 0 dB

 Out Attenuation is Set to 3 dB

 Echo Cancellation is enabled

 Echo Cancellation NLP mute is disabled

 Echo Cancellation NLP threshold is -21 dB

 Echo Cancel Coverage is set to 8 ms

 Playout-delay Mode is set to default

 Playout-delay Nominal is set to 60 ms

 Playout-delay Maximum is set to 200 ms

 Playout-delay Minimum mode is set to default, value 40 ms 

Connection Mode is normal

 Connection Number is not set

 Initial Time Out is set to 10 s

 Interdigit Time Out is set to 10 s

 Call Disconnect Time Out is set to 60 s

 Ringing Time Out is set to 180 s

 Wait Release Time Out is set to 30 s

 Companding Type is u-law

 Region Tone is set for US

 Analog Info Follows:

 Currently processing none

 Maintenance Mode Set to None (not in mtc mode)

 Number of signaling protocol errors are 0

 Impedance is set to 600r Ohm

 Station name None, Station number None

 Voice card specific Info Follows:

 Signal Type is loopStart

 Ring Frequency is 25 Hz

 Hook Status is On Hook

 Ring Active Status is inactive

Ring Ground Status is inactive

 Tip Ground Status is inactive

 Digit Duration Timing is set to 100 ms

 InterDigit Duration Timing is set to 100 ms

 No disconnect acknowledge

 Ring Cadence is defined by CPTone Selection

 Ring Cadence are [20 40] * 100 msec

Ringer Equivalence Number is set to 1

DID Mode

Enter the show voice port command to verify that the voice port is in DID mode:

router_1751# show voice port 2/1

Foreign Exchange Station with Direct Inward Dialing (FXS-DID) 2/1 Slot is 0, Sub-unit is 
2, Port is 1

 Type of VoicePort is DID-IN

 Operation State is DORMANT

 Administrative State is UP

 No Interface Down Failure

 Description is not set

 Noise Regeneration is enabled

 Non Linear Processing is enabled

 Non Linear Mute is disabled

 Non Linear Threshold is -21 dB

 Music On Hold Threshold is Set to -38 dBm

 In Gain is Set to 0 dB

 Out Attenuation is Set to 3 dB

 Echo Cancellation is enabled

 Echo Cancellation NLP mute is disabled

 Echo Cancellation NLP threshold is -21 dB

 Echo Cancel Coverage is set to 8 ms

 Playout-delay Mode is set to default

 Playout-delay Nominal is set to 60 ms

 Playout-delay Maximum is set to 200 ms

 Playout-delay Minimum mode is set to default, value 40 ms 

Playout-delay Fax is set to 300 ms

 Connection Mode is normal

 Connection Number is not set

 Initial Time Out is set to 10 s

 Interdigit Time Out is set to 10 s

 Call Disconnect Time Out is set to 60 s

 Ringing Time Out is set to 180 s

 Wait Release Time Out is set to 30 s

 Companding Type is u-law

 Region Tone is set for US

 Analog Info Follows:

 Currently processing none

 Maintenance Mode Set to None (not in mtc mode)

 Number of signaling protocol errors are 0

 Impedance is set to 600r Ohm

 Station name None, Station number None

 Signal Type is wink-start

 Dial Type is dtmf

 In Seizure is inactive

 Out Seizure is inactive

 Digit Duration Timing is set to 100 ms

InterDigit Duration Timing is set to 100 ms

 Pulse Rate Timing is set to 10 pulses/second

 InterDigit Pulse Duration Timing is set to 750 ms

 Clear Wait Duration Timing is set to 400 ms

 Wink Wait Duration Timing is set to 200 ms

 Wait Wink Duration Timing is set to 550 ms

 Wink Duration Timing is set to 200 ms

 Delay Start Timing is set to 300 ms

 Delay Duration Timing is set to 2000 ms

 Dial Pulse Min. Delay is set to 140 ms

 Percent Break of Pulse is 60 percent 

 Auto Cut-through is disabled

Dialout Delay is 70 msof

Obtaining Documentation

The following sections explain how to obtain documentation from Cisco Systems.

World Wide Web

You can access the most current Cisco documentation on the World Wide Web at the following URL:

http://www.cisco.com

Translated documentation is available at the following URL:

http://www.cisco.com/public/countries_languages.shtml

Documentation CD-ROM

Cisco documentation and additional literature are available in a Cisco Documentation CD-ROM package, which is shipped with your product. The Documentation CD-ROM is updated monthly and may be more current than printed documentation. The CD-ROM package is available as a single unit or through an annual subscription.

Ordering Documentation

Cisco documentation is available in the following ways:

•Registered Cisco.com users (Cisco direct customers) can order Cisco product documentation from the Networking Products MarketPlace:

http://www.cisco.com/cgi-bin/order/order_root.pl

•Registered Cisco.com users can order the Documentation CD-ROM through the online Subscription Store:

http://www.cisco.com/go/subscription

•Nonregistered Cisco.com users can order documentation through a local account representative by calling Cisco corporate headquarters (California, USA) at 408 526-7208 or, elsewhere in North America, by calling 800 553-NETS (6387).

Documentation Feedback

If you are reading Cisco product documentation on Cisco.com, you can submit technical comments electronically. Click the Fax or Email option under the "Leave Feedback" at the bottom of the Cisco Documentation home page.

You can e-mail your comments to bug-doc@cisco.com.

To submit your comments by mail, use the response card behind the front cover of your document, or write to the following address:

Cisco Systems
Attn: Document Resource Connection
170 West Tasman Drive
San Jose, CA 95134-9883

We appreciate your comments.

Obtaining Technical Assistance

Cisco provides Cisco.com as a starting point for all technical assistance. Customers and partners can obtain documentation, troubleshooting tips, and sample configurations from online tools by using the Cisco Technical Assistance Center (TAC) Web Site. Cisco.com registered users have complete access to the technical support resources on the Cisco TAC Web Site.

Cisco.com

Cisco.com is the foundation of a suite of interactive, networked services that provides immediate, open access to Cisco information, networking solutions, services, programs, and resources at any time, from anywhere in the world.

Cisco.com is a highly integrated Internet application and a powerful, easy-to-use tool that provides a broad range of features and services to help you to

•Streamline business processes and improve productivity

•Resolve technical issues with online support

•Download and test software packages

•Order Cisco learning materials and merchandise

•Register for online skill assessment, training, and certification programs

You can self-register on Cisco.com to obtain customized information and service. To access Cisco.com, go to the following URL:

http://www.cisco.com

Technical Assistance Center

The Cisco TAC is available to all customers who need technical assistance with a Cisco product, technology, or solution. Two types of support are available through the Cisco TAC: the Cisco TAC Web Site and the Cisco TAC Escalation Center.

Inquiries to Cisco TAC are categorized according to the urgency of the issue:

•Priority level 4 (P4)—You need information or assistance concerning Cisco product capabilities, product installation, or basic product configuration.

•Priority level 3 (P3)—Your network performance is degraded. Network functionality is noticeably impaired, but most business operations continue.

•Priority level 2 (P2)—Your production network is severely degraded, affecting significant aspects of business operations. No workaround is available.

•Priority level 1 (P1)—Your production network is down, and a critical impact to business operations will occur if service is not restored quickly. No workaround is available.

Which Cisco TAC resource you choose is based on the priority of the problem and the conditions of service contracts, when applicable.

Cisco TAC Web Site

The Cisco TAC Web Site allows you to resolve P3 and P4 issues yourself, saving both cost and time. The site provides around-the-clock access to online tools, knowledge bases, and software. To access the Cisco TAC Web Site, go to the following URL:

http://www.cisco.com/tac

All customers, partners, and resellers who have a valid Cisco services contract have complete access to the technical support resources on the Cisco TAC Web Site. The Cisco TAC Web Site requires a Cisco.com login ID and password. If you have a valid service contract but do not have a login ID or password, go to the following URL to register:

http://www.cisco.com/register/

If you cannot resolve your technical issues by using the Cisco TAC Web Site, and you are a Cisco.com registered, you can open a case online by using the TAC Case Open tool at the following URL:

http://www.cisco.com/tac/caseopen

If you have Internet access, it is recommended that you open P3 and P4 cases through the Cisco TAC Web Site.

Cisco TAC Escalation Center

The Cisco TAC Escalation Center addresses issues that are classified as priority level 1 or priority level 2; these classifications are assigned when severe network degradation significantly impacts business operations. When you contact the TAC Escalation Center with a P1 or P2 problem, a Cisco TAC engineer will automatically open a case.

To obtain a directory of toll-free Cisco TAC telephone numbers for your country, go to the following URL:

http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml

•Before calling, please check with your network operations center to determine the level of Cisco support services to which your company is entitled; for example, SMARTnet, SMARTnet Onsite, or Network Supported Accounts (NSA). In addition, please have available your service agreement number and your product serial number.