This topic summarizes the key points discussed in this module.
© 2005 Cisco Systems, Inc. All rights reserved. GWGK v1.01-1
Module Summary
Gateways connect two different types of networks.
The differences in the voice gateway protocols provide a basis for selection.
H.323 is a robust, peer-to-peer gateway protocol that serves the needs of TDM interworking very well.
MGCP is suited to scalability and survivability.
SIP perform many of the functions of H.323 with the added benefit of high extensibility because of the ease of development of SIP-related applications.
MGCP-controlled backhaul of BRI signaling provides service to remote office gateways that connect via ISDN BRI trunks to a centralized Cisco CallManager.
Support for fax and modem remains a challenge for system administrators. The relay and pass-through systems are activated through dial-peer configuration commands.
The implementation of gateways is critical to the success of VoIP or an IP telephony solution.
The module covered the concepts involved with gateway deployment, including the selection of the protocol that you will deploy, the routes that you set up on the dial peers or in CallManager, and how you handle issues such as a lack of DTMF tones or problems sending or receiving faxes.
References
For additional information, refer to these resources:
Cisco CallManager
A Typical U.S. Dial Plan for Cisco CallManager 3.x and 4.x.
http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_tech_note09186a00800 94b2a.shtml.
Cisco CallManager Administration Guide Release 4.1(1).
http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_administration_guide_b ook09186a00802d8eaf.html.
Cisco CallManager and Cisco IOS Interoperability Configuration Guide.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/vvfax_c/callc_c /ccm_c/index.htm.
Cisco CallManager Express (CME) 3.0 Design Guide.
http://www.cisco.com/univercd/cc/td/doc/product/access/ip_ph/ip_ks/its30/cme30dg.htm
Cisco CallManager Express 3.0 System Administrator Guide.
http://www.cisco.com/en/US/partner/products/sw/iosswrel/ps5012/products_feature_guide _book09186a00801812e4.html.
Cisco CallManager Security Guide Release 4.1(2).
http://www.cisco.com/univercd/cc/td/doc/product/voice/c_callmg/sec_vir/ae/sec412/index.
htm.
Cisco CallManager System Guide Release 4.1(2).
http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_administration_guide_b ook09186a00802d8ff6.html.
Cisco IP Telephony Solution Reference Network Design (SRND) Cisco CallManager Release 4.0.
http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_implementation_design _guide_book09186a00802c370c.html.
Configuring MGCP PRI Backhaul and T1 CAS Support for Cisco CallManager.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/vvfax_c/callc_c /ccm_c/intcnf3.htm.
Overview of Cisco CallManager and Cisco IOS Interoperability.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/vvfax_c/callc_c /ccm_c/interovr.htm.
Fax and Modems
Cisco Fax Services over IP Application Guide.
http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_feature_guide_book09 186a008017cf32.html.
Modem Support for VoIP.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/vvfax_c/vclmo dem.htm.
H.323
Cisco H.235 Accounting and Security Enhancements for Cisco Gateways.
http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_feature_guide09186a0 0800b5d51.html.
Cisco IOS H.323 Gateway Configuration for Use with Cisco CallManager.
http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_tech_note09186a00800 94636.shtml.
Configuring H.323 Gateways.
http://www.cisco.com/en/US/products/sw/iosswrel/ps5207/products_configuration_guide_c hapter09186a00802b45e0.html.
H.323 and SIP Integration.
http://www.cisco.com/en/US/tech/tk652/tk701/technologies_white_paper09186a00800929 47.shtml.
H.323 Gateway Dial-Peer Configuration for Cisco CallManager Server Redundancy.
http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_configuration_example 09186a0080094852.shtml.
Understanding H.323 Gatekeepers.
http://www.cisco.com/en/US/tech/tk652/tk701/technologies_tech_note09186a00800c5e0d.
shtml.
IOS Command References
Cisco IOS Debug Command Reference, Release 12.3.
http://www.cisco.com/en/US/products/sw/iosswrel/ps5187/products_command_reference_
book09186a008017cf4d.html.
Cisco IOS Dial Technologies Configuration Guide, Release 12.2.
http://www.cisco.com/en/US/products/sw/iosswrel/ps1835/products_configuration_guide_
book09186a0080393bf3.html.
Cisco IOS Security Configuration Guide, Release 12.3
http://www.cisco.com/en/US/products/sw/iosswrel/ps5187/prod_configuration_guide09186 a008017d583.html.
Cisco IOS Software. http://www.cisco.com/kobayashi/sw-center/sw-ios.shtml.
Important Information on Debug Commands.
http://www.cisco.com/en/US/tech/tk801/tk379/technologies_tech_note09186a008017874c.
shtml.
IOS Voice
Cisco IOS Voice Command Reference, Release 12.3.
http://www.cisco.com/en/US/products/sw/iosswrel/ps5187/products_command_reference_
book09186a00801e8a79.html.
Cisco IOS Voice Configuration Library.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/vcl.htm.
Cisco IOS Voice Troubleshooting and Monitoring Guide.
http://cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/vvfax_c/voipt_c/inde x.htm.
Cisco IOS Voice, Video, and Fax Configuration Guide Release 12.2.
http://www.cisco.com/en/US/partner/products/sw/iosswrel/ps1835/products_configuration_
guide_book09186a0080080ada.html.
Understanding Cisco IOS Gatekeeper Call Routing.
http://www.cisco.com/en/US/tech/tk652/tk701/technologies_tech_note09186a00800a8928.
shtml.
MGCP
Cisco IOS MGCP and Related Protocols Configuration Guide.
http://www.cisco.com/en/US/products/sw/iosswrel/ps5207/products_configuration_guide_
book09186a008020bd29.html.
Configuring Cisco CallManager with IOS MGCP Gateways (Analog FXO, FXS Ports).
http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_tech_note09186a00800 9428e.shtml.
Configuring MGCP-Controlled Backhaul of BRI Signaling in Conjunction with Cisco CallManager.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/vvfax_c/callc_c /ccm_c/int_bri.htm.
How to Configure MGCP with Digital PRI and Cisco CallManager.
http://www.cisco.com/en/US/tech/tk652/tk701/technologies_configuration_example09186a 00801ad22f.shtml.
Interworking of Cisco MGCP Voice Gateways and Cisco CallManager Version 3.2.
http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_feature_guide09186a0 0800b65dd.html.
Media and Signaling Authentication and Encryption Feature for Cisco IOS MGCP Gateways.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123newft/123t/123t_11/
gtsecure.htm.
IETF.org.Media Gateway Control Protocol (MGCP) Version 1.0.
http://www.ietf.org/rfc/rfc3435.txt.
Understanding MGCP Interactions with Cisco CallManager.
http://www.cisco.com/warp/public/788/AVVID/understanding_mgcp.html.
SIP Cisco IOS SIP Configuration Guide.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/vvfax_c/callc_c /sip_c/sipc1_c/index.htm.
Configuring SIP ISDN Support Features.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/vvfax_c/callc_c /sip_c/sipc1_c/chapter8.htm.
Enhancements to the Session Initiation Protocol for VoIP on Cisco Access Platforms.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122t/122t11/ft sipgv1.htm.
Guide to Cisco Systems VoIP Infrastructure Solution for SIP Version 1.0.
http://www.cisco.com/univercd/cc/td/doc/product/voice/sipsols/biggulp/.
Preparing Cisco SRST Support for SIP.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123newft/123t/123t_11/
srst32ad/srs_sip.htm.
IETF.org.SIP: Session Initiation Protocol.http://www.ietf.org/rfc/rfc2543.txt.
VoIP Cisco - VoIP Toll Bypass Application for International Bank.
http://www.cisco.com/en/US/tech/tk652/tk701/technologies_configuration_example09186a 0080094b97.shtml.
Configuring Voice over IP.
http://www.cisco.com/en/US/products/sw/iosswrel/ps1831/products_configuration_guide_c hapter09186a00800ca6a2.html.
Service Provider Features for Voice over IP.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120t/120t3/voi p1203.htm.
Voice Design and Implementation Guide. http://www.cisco.com/warp/public/788/pkt-voice-general/7.html.
Voice Network Signaling and Control.
http://www.cisco.com/en/US/tech/tk652/tk653/technologies_tech_note09186a00800a6210.
shtml#Topic4.
Voice Over IP - Per Call Bandwidth Consumption.
http://www.cisco.com/en/US/tech/tk652/tk698/technologies_tech_note09186a0080094ae2.
shtml.