Traffic engineering
148 Avaya Application Solutions IP Telephony Deployment Guide
One of the first steps in the process is to distinguish between intercom call usage, inbound
PSTN call usage, and outbound PSTN call usage. Inbound and outbound tie trunk usage must
also be considered when working with multiple Communication Manager systems that
networked together. However, that discussion is presented in a later section.
Although Avaya systems can be used as tandem switches for PSTN traffic, that possibility is not
considered here. Traffic between two other Avaya systems in a network is the only traffic that
can be routed through Communication Manager. So, in the case of a single stand-alone system,
there is typically no tandem traffic. Therefore, because every call involves at least one station,
one must be careful to reconcile the station usage with the call usage.
For example, suppose that the total station usage is 100 Erlangs, which could hypothetically
correspond to 20 Erlangs of intercom call usage, 30 Erlangs of inbound PSTN usage, and 30
Erlangs of outbound PSTN usage:
●
Intercom station usage = 40 Erlangs (2 Avaya stations per call x 20 Erlangs of intercom
call usage)
●
Inbound station usage = 30 Erlangs (1 Avaya station per call x 30 Erlangs of inbound call
usage)
●
Outbound station usage = 30 Erlangs (1 Avaya station per call x 30 Erlangs of outbound
call usage)
The 40 Erlangs that are associated with intercom calls, plus the 30 Erlangs that are associated
with inbound calls, plus the 30 Erlangs that are associated with outbound calls total 100 Erlangs
of station usage.
Table 21: 3-site standalone community of interest (COI) matrix
CUR
To endpoints in site __
1
2
3
From
end
poi
nt
s in Sit
e
___
_ 1
Call usage generated by
Site 1 endpoints,
terminating at Site 1
endpoints
Call usage generated by
Site 1 endpoints,
terminating at Site 2
endpoints
Call usage generated by
Site 1 endpoints,
terminating at Site 3
endpoints
2
Call usage generated by
Site 2 endpoints,
terminating at Site 1
endpoints
Call usage generated by
Site 2 endpoints,
terminating at Site 2
endpoints
Call usage generated by
Site 2 endpoints,
terminating at Site 3
endpoints
3
Call usage generated by
Site 3 endpoints,
terminating at Site 1
endpoints
Call usage generated by
Site 3 endpoints,
terminating at Site 2
endpoints
Call usage generated by
Site 3 stations, terminating
at Site 3 endpoints
Summary of Contents for Application Solutions
Page 1: ...Avaya Application Solutions IP Telephony Deployment Guide 555 245 600 Issue 3 4 1 June 2005 ...
Page 20: ...About This Book 20 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 21: ...Issue 3 4 1 June 2005 21 Section 1 Avaya Application Solutions product guide ...
Page 22: ...22 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 106: ...Call processing 106 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 124: ...Avaya LAN switching products 124 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 139: ...Issue 3 4 1 June 2005 139 Section 2 Deploying IP Telephony ...
Page 140: ...140 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 186: ...Traffic engineering 186 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 204: ...Security 204 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 228: ...Avaya Integrated Management 228 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 274: ...Reliability and Recovery 274 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 275: ...Issue 3 4 1 June 2005 275 Section 3 Getting the IP network ready for telephony ...
Page 276: ...276 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 356: ...Network recovery 356 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 366: ...Network assessment offer 366 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 367: ...Issue 3 4 1 June 2005 367 Appendixes ...
Page 368: ...Appendixes 368 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 394: ...Access list 394 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 414: ...DHCP TFTP 414 Avaya Application Solutions IP Telephony Deployment Guide ...