Server User's Manual

Table Of Contents
Calculations 377
Bandwidth requirements
Bandwidth requirements in this section refer to the information in Table 42
"Full Duplex Ethernet bandwidth for one channel (one Erlang)" (page 377),
Table 43 "Traffic capacity at P.01, P.005, and P.001 GOS" (page 377), and
Table 44 "LAN/WAN bandwidth for one channel (one Erlang)" (page 377).
Table 42
Full Duplex Ethernet bandwidth for one 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
Table 43
Traffic capacity at P.01, P.005, and P.001 GOS
Device P.01 P.005 P.001
MC (32-port) 794 CCS 744 CCS 655 CCS
T1 (24 ports) 550 CCS 511 CCS 441 CCS
E1 (30 ports) 732 CCS 685 CCS 600 CCS
Table 44
LAN/WAN bandwidth 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, Nortel Networks
.