Cisco Systems, Inc.

All contents are Copyright © 1992–2001 Cisco Systems, Inc. All rights reserved. Important Notices and Privacy Statement.

Page 1 of 4

Data Sheet

Cisco

SIP Proxy

Server

Overview

The Cisco SIP Proxy Server is a call-control software package that enables service providers to build

scalable, reliable packet-voice networks today. Based on the Session Initiation Protocol (SIP), the

Cisco SIP Proxy Server provides a full array of call-routing capabilities to maximize network

performance in both small and large packet-voice networks.

The Cisco SIP Proxy Server delivers high-performance call processing, enabling service providers to quickly

and reliably deploy large-scale packet-voice networks. It can support a variety of different SIP server functions,

including Redirect Server, transaction stateful or stateless Proxy Server, and Registrar. As a key component in

Cisco SIP infrastructure solutions, the Cisco SIP Proxy Server provides the foundation for building advanced

voice networks and services.

Located in the core of a SIP network, the Cisco SIP Proxy Server routes calls between Cisco voice gateways,

Internet Protocol (IP) endpoints (such as IP phones), and application servers. By supporting multiple interfaces

to sources of routing information, the proxy server can efficiently execute routing decisions to obtain improved

productivity from a SIP network.

In addition to routing, the Cisco SIP Proxy Server enables call authorization decisions to be made within the

network, identifying authorized calls before they reach terminating voice gateways. During the setup and

teardown stages of a call, the proxy can generate Call Detail Records (CDRs) and pass the information to a

Remote Access Dial-In User Service (RADIUS) server for correlation.

By focusing on performance and reliability, the Cisco SIP Proxy Server enables service providers to quickly and

easily deploy new services on next-generation voice networks.

Features and Benefits

Real-Time Call Routing Capabilities

Call routing is central to the Cisco SIP Proxy Server’s role in a SIP network. Routing is handled in multiple

stages: number expansion, translation, and next-hop routing.

During the number-expansion phase, digits are added to (or stripped from) inbound numbers, as appropriate,

to create valid E.164 numbers. In the translation phase, the proxy server will query one or several modules,

such as the registry, a Gatekeeper Transaction Message Protocol (GKTMP) application server, or a Telephone

Number Mapping (ENUM) server. The translation phase might return a translated number or a next-hop

address. Once the translation is complete, the proxy server moves into the next-hop routing phase. In cases

where the next-hop is a Domain Name System (DNS) hostname, the proxy server performs a DNS query to

determine the appropriate IP address.

Cisco Systems, Inc.

All contents are Copyright © 1992–2001 Cisco Systems, Inc. All rights reserved. Important Notices and Privacy Statement.

Page 2 of 4

The Cisco SIP Proxy Server, in combination with Cisco voice gateways, enables the deployment of hybrid H.323 and

SIP networks. To route calls in a hybrid environment, the proxy server queries an H.323 gatekeeper for routing

information using standard Registration, Admission and Status (RAS) messages. The proxy server uses this routing

information to forward a call to the appropriate multiprotocol voice gateway using SIP.

Performance and Availability

To maximize service availability, the Cisco SIP Proxy Server is designed for deployment in server “farms”, allowing

multiple proxy servers to work together and share information. In a server farm, multiple physical servers can act as

one virtual server. A single server farm is represented by a domain name, where DNS is used to resolve the

appropriate IP address. A proxy farm can support up to three individual proxy servers (Figure 1). Registry and

routing information is synchronized across the proxy servers dynamically, allowing user agent information to be

maintained by the farm in case of a proxy failure. DNS services (SRV) records, or DNS A-record round-robin resolves

failures, by providing multiple destination addresses during a lookup.

Figure 1

Proxy Farm Using Cisco SIP Proxy Servers

Product Specifications

Table 1 gives the specifications for the Cisco SIP Proxy Server.

Table 1

Specifications for Cisco SIP Proxy Server

SIP compliance

SIP Proxy or Redirect Server
Transaction stateful or stateless
SIP Registrar
User Datagram Protocol (UDP)
Transport Control Protocol (TCP)

Security

IP Security (IPSec)
Access control lists (ACLs)
Authentication via subscriber database or RADIUS interface
Digest or basic authentication

proxy1.cisco.com
10.1.1.1

proxy2.cisco.com
10.1.1.2

farm.cisco.com

proxy3.cisco.com
10.1.1.3

IP

IP

IP

IP

IP

IP

Cisco Systems, Inc.

All contents are Copyright © 1992–2001 Cisco Systems, Inc. All rights reserved. Important Notices and Privacy Statement.

Page 3 of 4

Call Routing

Static routes
Static and dynamic registrations
Domain-specific registration
GKTMP interface
ENUM interface
H.323 location request (LRQ) interface
DNS SRV and A-Record queries

Call-Forwarding features

Call forward busy
Call forward no answer
Call forward unavailable
Call forward unconditional

Other call-processing features

Call forking (parallel)
Record route
Recursive lookups
sip:URL
Spiral loop detection
Rport parameter

Accounting

CDRs
Cisco vendor-specific attributes (VSAs)
RADIUS interface

Availability

Server farms
Load balancing

Subscriber database

MySQL database

Operating systems

Sun Solaris Operating Environment Version 8
RedHat Linux Version 7.1

Management

Graphical user interface (GUI)
Command-line interface (CLI)
Simple Network Management Protocol (SNMP) interface
Access, error, and statistics logging

Specifications for Cisco SIP Proxy Server

Corporate Headquarters
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-1706
USA
www.cisco.com
Tel: [phone]

800 553-NETS (6387)

Fax: [phone]

European Headquarters
Cisco Systems Europe
11, Rue Camille Desmoulins
92782 Issy-les-Moulineaux
Cedex 9
France
www-europe.cisco.com
Tel: [phone]
Fax: [phone]

Americas Headquarters
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-1706
USA
www.cisco.com
Tel: [phone]
Fax: [phone]

Asia Pacific Headquarters
Cisco Systems, Inc.
Capital Tower
168 Robinson Road
#22-01 to #29-01
Singapore 068912
www.cisco.com
Tel: [phone]
Fax: [phone]

Cisco Systems has more than 200 offices in the following countries and regions. Addresses, phone numbers, and fax numbers are listed on the

C i s c o W e b s i t e a t w w w . c i s c o . c o m / g o / o f f i c e s

Argentina • Australia • Austria • Belgium • Brazil • Bulgaria • Canada • Chile • China PRC • Colombia • Costa Rica • Croatia
Czech Republic • Denmark • Dubai, UAE • Finland • France • Germany • Greece • Hong Kong SAR • Hungary • India • Indonesia • Ireland
Israel • Italy • Japan • Korea • Luxembourg • Malaysia • Mexico • The Netherlands • New Zealand • Norway • Peru • Philippines • Poland
Portugal • Puerto Rico • Romania • Russia • Saudi Arabia • Scotland • Singapore • Slovakia • Slovenia • South Africa • Spain • Sweden
S w i t z e r l a n d • Ta i w a n • T h a i l a n d • Tu r k e y • U k r a i n e • U n i t e d K i n g d o m • U n i t e d S t a t e s • Ve n e z u e l a • Vi e t n a m • Z i m b a b w e

Copyright © 2002 Cisco Systems, Inc. All rights reserved. Cisco, Cisco IOS, Cisco Systems, and the Cisco Systems logo are registered trademarks of Cisco Systems, Inc. and/or its affiliates in the U.S. and certain other
countries.

All other trademarks mentioned in this document or Web site are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company.
(0208R)

LCL/JSI/10/02

Availability and Ordering Information

Product numbers for the Cisco SIP Proxy Server are given in Table 2.

Table 2

Product Part Numbers for Cisco SIP Proxy Server

Product Description

Part Number

Cisco SIP Proxy Server Version 2.0 for Linux

SW-SPS-2.0-L

Cisco SIP Proxy Server Version 2.0 for Solaris

SW-SPS-2.0-S

Cisco SIP Proxy Server Version 2.0 for Linux
Upgrade from Version 1.x

SW-SPS-2.0-L-UPG

Cisco SIP Proxy Server Version 2.0 for Solaris
Upgrade from Version 1.x

SW-SPS-2.0-S-UPG

Cisco SIP Proxy Server Version 2.x for Linux
Enterprise Software Application Support + Upgrades

CON-SAU-SW-SPS-2L

Cisco SIP Proxy Server Version 2.x for Linux
Service Provider Software Application Support + Upgrades

SP-SAU-SW-SPS-2L

Cisco SIP Proxy Server Version 2.x for Linux
Enterprise Software Application Support

CON-SAS-SW-SPS-2L

Cisco SIP Proxy Server Version 2.x for Linux
Service Provider Software Application Support

SP-SAS-SW-SPS-2L

Cisco SIP Proxy Server Version 2.x for Solaris
Enterprise Software Application Support + Upgrades

CON-SAU-SW-SPS-2S

Cisco SIP Proxy Server Version 2.x for Solaris
Service Provider Software Application Support + Upgrades

SP-SAU-SW-SPS-2S

Cisco SIP Proxy Server Version 2.x for Solaris
Enterprise Software Application Support

CON-SAS-SW-SPS-2S

Cisco SIP Proxy Server Version 2.x for Solaris
Service Provider Software Application Support

SP-SAS-SW-SPS-2L