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Resource sizing
Issue 6 January 2008 211
Starting with release 3.1 of Communication Manager, the TN2602AP IP Media Resource 320
can be duplicated to provide critical bearer reliability for IP-connected port networks.
If more than one PN had been required in a particular site, intrasite calls between
circuit-switched endpoints in that site would have contributed toward media processing usage
because inter-Port Network calls between circuit-switched endpoints traverse an IP network.
Since only one PN is required in each site in this example, the media-processing usage for calls
between circuit-switched endpoints is zero in each site, as indicated in Table 34
.
Processing occupancy
The Busy Hour Call Attempt (BHCA) rate of a system is the total number of calls that are
attempted within that system, during its busy hour. This is distinct from the Busy Hour Call
Completion (BHCC) rate of a system, which counts only those calls that have actually been
completed. The call capacity of a system refers to its BHCC rate.
In Communication Manager products, server occupancy (or processor occupancy, as
applicable) can be broken down into three categories: static occupancy, Call Processing (CP)
occupancy, and system management (SM) occupancy. The static component refers to
keep-alive processes, the CP component refers to processes that are required to set up and
tear down calls (as well as vectoring operations, in the case of call centers), and the SM
component refers to background maintenance operations and system audits. In theory, static
occupancy is a fixed overhead, and CP occupancy is directly proportional to the call rate. SM
Encrypted
G.711
10 24 48 48 80 320
G.729
10 12 24 24 80 320
G.723
10 12 24 24 NA NA
G.726
10 12 24 NA 80 320
T.38 Fax
or Modem over IP
10 8 16 16 80 320
1. 16 when transcoding G.711 to another codec.
Table 38: Maximum number of simultaneous media processor connections (continued)
Connection Type
Supported by
Single
G250
Mother
board
Single
G350
Mother
board
Single G700
Motherboard
(DAF-1), or a
Single Extra
VoIP card for
G700 (MM760)
Single
TN2302AP
Board
Single
TN2602AP
with
Maximum
Licensed
Capacity of
80
Single
TN2602AP
with
Maximum
Licensed
Capacity of
320
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