IP-based trunks
Issue 3.4.1 June 2005
99
IP-based trunks
In circuit switched networks, trunks provide the means to interconnect PBXs with each other
and to the PSTN. Connection to the public network allows PBX station users to call and be
called by terminals that are not part of the PBX private network of the PBX. An analogous
arrangement exists in packet-switched IP networks.
H.323 trunks connect H.323 systems or gateways over IP networks, similar to circuit-switched
tie trunks. Similarly, SIP trunks connect SIP systems or gateways over IP networks.
A set of Communication Manager switches can each be attached to an IP network, and voice
and fax calls can flow between them in the usual manner except that the call signaling and
audio/fax streams are carried over the IP network. The signaling is carried on a TCP connection
through the C-LAN circuit packs, and the audio and fax streams are carried between switches
through the Media Processor circuit packs.
The benefits of using IP trunks include:
●
Reducing long distance voice and fax expenses
●
Facilitating global communications
●
Providing a fully functional network with data and voice
●
Converging and optimizing networks by using the available network resources
IP trunk calls can be compressed to save network bandwidth. Repeated compression and
decompression (transcoding) results in a loss of data at each stage and degrades the final
quality of the signal. The maximum recommended number of compression cycles on a call is
three. Normal corporate voice calls or fax calls typically go through fewer than three
compression cycles.
IP (H.323 and SIP) trunks can also connect to other vendors’ compliant PBXs.
SIP trunk capacities
Table 17
shows the maximum number of SIP trunks supported out of the total number of IP
trunks supported.
Table 17: SIP Trunk Capacities by Platform Configuration
Platform Configuration
Maximum Number of SIP IP Trunks
of the Total IP Trunks Supported
S8700 Multi-Connect
1000 of 8000
S8700 IP-Connect
1000 of 4000
S8700/G700/G350/LSP
1000 of 8000
S8500
800 of 800
S8300/G700/G350
100 of 450
Содержание Application Solutions
Страница 1: ...Avaya Application Solutions IP Telephony Deployment Guide 555 245 600 Issue 3 4 1 June 2005 ...
Страница 20: ...About This Book 20 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 21: ...Issue 3 4 1 June 2005 21 Section 1 Avaya Application Solutions product guide ...
Страница 22: ...22 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 74: ...Avaya Application Solutions platforms 74 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 106: ...Call processing 106 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 124: ...Avaya LAN switching products 124 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 139: ...Issue 3 4 1 June 2005 139 Section 2 Deploying IP Telephony ...
Страница 140: ...140 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 186: ...Traffic engineering 186 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 204: ...Security 204 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 214: ...Voice quality network requirements 214 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 228: ...Avaya Integrated Management 228 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 239: ...Reliability Issue 3 4 1 June 2005 239 Figure 69 S8700 Media Server in a high reliability configuration ...
Страница 274: ...Reliability and Recovery 274 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 275: ...Issue 3 4 1 June 2005 275 Section 3 Getting the IP network ready for telephony ...
Страница 276: ...276 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 350: ...Implementing Communication Manager on a data network 350 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 356: ...Network recovery 356 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 366: ...Network assessment offer 366 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 367: ...Issue 3 4 1 June 2005 367 Appendixes ...
Страница 368: ...Appendixes 368 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 394: ...Access list 394 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 414: ...DHCP TFTP 414 Avaya Application Solutions IP Telephony Deployment Guide ...