Calculations 377
Bandwidth requirements

Bandwidth requirements in this section refer to the information in Tab le 42

"Full Duplex Ethernet bandwidth for one channel (one Erlang)" (page 377),

Table43 "Traffic capacity at P.01,P.005, and P.001GOS" (page 377), and

Table44 "LAN/WAN bandwidth for one channel (one Erlang)" (page 377).

Table 4 2
Full Duplex Ethernet bandwidth forone channel (one Erlang)
CODEC Payload Full Duplex Ethernet
G.711 10 ms 126 kbit/s
G.711 20 ms 95 kbit/s
G.711 30 ms 85 kbit/s
G.729A 10 ms 70 kbit/s
G.729A 20 ms 39 kbit/s
G.729A 30 ms 29 kbit/s
Tabl e 43
Trafficcapacity at P.01, P.005, and P.001GOS
Device P.01 P.005 P.001
MC (32-port) 794 CCS 744 CCS 655 CCS
T1 (24 ports) 550CCS 511 CCS 441 CCS
E1 (30 ports) 732CCS 685 CCS 600 CCS
Table 4 4
LAN/WANbandwidth for one channel (one Erlang)
CODEC Payload LAN/WAN
G.711 10 ms 48 kbit/s
G.711 20 ms 40 kbit/s
G.711 30 ms 37 kbit/s
G.729A 10 ms 20 kbit/s
G.729A 20 ms 12 kbit/s
G.729A 30 ms 9 kbit/s
Procedure 49
Calculating TLAN subnet bandwidth for IP Phone traffic
Step Action

Incremental bandwidth required on the TLAN subnet to carry given voice

traffic:

Nortel Communication Server 1000
Branch Office Installation and Commissioning
NN43001-314 01.02 Standard
Release 5.0 20 June 2007
Copyright© 2007, Nor tel Networks
.