SIP-to-SIP Basic Functionality

Table Of Contents

IP-to-IP Gateway: SIP-to-SIP Basic Functionality

Prerequisites

Restrictions

How to Configure SIP-to-SIP Connections in a Cisco Unified Border Element (Enterprise)

IP-to-IP Gateway: SIP-to-SIP Basic Functionality

SIP-to-SIP Basic Functionality for Cisco Unified Border Element (Cisco UBE) and Cisco Unified Border Element (Enterprise) (Cisco UBE (Enterprise)) provides termination and reorigination of both signaling and media between VoIP and video networks using SIP signaling in conformance with RFC3261. The SIP-to-SIP protocol interworking capabilities support the following:

•Basic voice calls (Supported audio codecs include: G.711, G.729, G.728, G.726, G.723, G.722, gsmamr nb, AAC_LD, iLBC. Video codecs: H.263, and H.264)

•Calling/called name and number

•DTMF relay interworking

–SIP RFC 2833 <-> SIP RFC 2833

–SIP Notify <-> SIP Notify

•Interworking between SIP early-media and SIP early-media signaling

•Interworking between SIP delayed-media and SIP delayed-media signaling

•RADIUS call-accounting records

•RSVP synchronized with call signaling

•SIP-to-SIP Video calls

•TCL IVR 2.0 for SIP, including media playout and digit collection (RFC 2833 DTMF relay)

•T.38 fax relay and Cisco fax relay

•UDP and TCP transport

Prerequisites

Cisco Unified Border Element

•Cisco IOS Release 12.2(13)T3 or a later release must be installed and running on your Cisco Unified Border Element.

Cisco Unified Border Element (Enterprise)

•Cisco IOS XE Release 2.5 or a later release must be installed and running on your Cisco ASR 1000 Series Router.

Restrictions

•Connections are disabled by default in Cisco IOS images that support the Cisco UBE (Enterprise).

How to Configure SIP-to-SIP Connections in a Cisco Unified Border Element (Enterprise)

To configure SIP-to-SIP connection types, perform the steps in this section.

SUMMARY STEPS

1. enable

2. configure terminal

3. voice service voip

4. allow-connections

5. exit

DETAILED STEPS

	Command or Action	Purpose
Step 1	enable Example: Router> enable	Enables privileged EXEC mode. •Enter your password if prompted.
Step 2	configure terminal Example: Router# configure terminal	Enters global configuration mode.
Step 3	voice service voip Example: Router(config)# voice service voip	Enters VoIP voice-service configuration mode.
Step 4	allow-connections from-type to to-type Example: Router(config-voi-serv)# allow-connections sip to sip	Allows connections between specific types of endpoints in an Cisco UBE. Arguments are as follows: •from-type—Type of connection. Valid values: h323, sip. •to-type—Type of connection. Valid values: h323, sip. Note H.323-to-H.323: By default, H.323-to-H.323 connections are disabled and POTS-to-any and any-to-POTS connections are enabled.
Step 5	exit Example: Router(config-voi-serv)# exit	Exits the current mode.