Forwarding Incoming Calls to Unused Ports on Cisco 800 Series Routers

This document describes how to set up the dial-peer configuration in the router to forward an incoming call to an unused port. The following sections are included:

The following sections are included:

Feature Overview

Supported Platforms

Supported Standards, MIBs, and RFCs

Prerequisites

Configuration Tasks

Configuration Examples

Command Reference

Feature Overview

The Cisco 800 series routers connect small professional offices over Integrated Services Digital (ISDN) Basic Rate Interface (BRI) lines to corporate networks and to the Internet. The routers provide bridging and multiprotocol routing capability between LAN and WAN ports. Cisco IOS Release 12.0(4)T provides software support for the Cisco 800 series routers.

This feature allows the router to forward an incoming call to an unused port. The default is no forward-to-unused-port.

Benefits

This feature allows the user to receive all calls into one POTS port. If there are two calls at the same time, the second call may be forwarded to another port or cause the first call to be interrupted by a call-waiting tone.

Supported Platforms

This feature is supported on the following platforms:

Cisco 801 router
Cisco 802 router
Cisco 803 router
Cisco 804 router

Supported Standards, MIBs and RFCs

None

Prerequisites

The following prerequisites apply to this feature:

This new feature will work only if a called party number is received inside the incoming call. If no called part number is received then the incoming call will be directed to port 1.

Configuration Tasks

This section describes setting up the dial-peer configuration to forward an incoming call to an unused port.

Setting up the dial-peer configuration to forward an incoming call to an unused port
Verifying that forwarding incoming call to unused port is enabled

Setting up the Dial Peer Configuration to Forward an Incoming Call to an Unused Port

Perform the following steps to forward an incoming call to an unused port.

Task Command

Step 1

Enter configuration mode.

configure terminal

Step 2

Assign a dial-peer voice port for POTS.

dial-peer voice <number from 1 to max number of dial-peers>pots

Step 3

Disable or enable the automatic forward to an unused port.

[no] forward-to-unused-port

Task		Command
Step 1	Enter configuration mode.	configure terminal
Step 2	Assign a dial-peer voice port for POTS.	dial-peer voice <number from 1 to max number of dial-peers>pots
Step 3	Disable or enable the automatic forward to an unused port.	[no] forward-to-unused-port

Verifying that Forwarding Incoming Call to Unused Port is Enabled

Perform the following steps to verify a successful configuration.

Create 2 dial-peers for phone numbers, for example, 555-1111 and 555-2222. Point both of them to port 1. Make a call to 555-1111. When the phone on port 1 rings, pick it up. Make a phone call to 555-2222. If the "forward-to-unused-port" feature is enabled, the phone on port 2 should ring. Otherwise a call-waiting tone is heard on phone 1, assuming that call-waiting feature is available.

Configuration Examples

None

Command Reference

This section describes the new and modified commands associated with this feature.

router (config-if)# no forward-to-unused-port

router (config-if)# forward-to-unused-port

The following examples show various scenarios of forward-to-unused-port enabled.

Suppose a call to 555-1111 is received and its dial-peer is fetched and this points to port 1. The following will determine where the new call will be forwarded:
- Case A:
Port 1 currently has no call on it. The new call to 555-1111 is sent to port 1.
- Case B:
Port 1 already has one call to 555-1111. The new call to 555-1111 is sent to port 1.
- Case C:
Port 1 has one call to 555-2222 and port 2 has no calls. The new call to 555-1111 is sent to port 2.
- Case D:
Port 1 has one call to 555-2222 and port 2 has one call to 555-1111. The new call to 555-1111 is sent to port 2.
- Case E:
Port 1 has one call to 555-2222 and port 2 has one call to 555-3333. The new call to 555-1111 is sent to port 1.
- Case F:
Port 1 has one call to 555-2222 and port 2 has two calls. The new call to 555-1111 is sent to port 1.
- Case G:
Port 1 already has 2 calls. The new call to 555-1111 is sent to port 2.
DMS NI1 line with multiple numbers:

Suppose the following SPIDs and dial-peers are set up:

isdn spid1 40855511110101 5551111 5552222

dial-peer v 1 p

destination-pattern 5551111

forward-to-unused-port

port 1

dial-peer v 2 p

destination-pattern 5552222

forward-to-unused-port

port 1

A call for 555-1111 is first received. So, it is connected to port 1. Then, a call to 555-2222 is received. Since port 2 has no calls, this new call is sent to port 2. The DMS NI1 will then release the second call because it is expecting the first call to be put on hold.

Related Commands

no forward-to-unused-port

dial-peer voice <number from 1 to max number of dial-peers> pots

Table of Contents

Forwarding Incoming Calls to Unused Ports on Cisco 800 Series Routers