Siemens HiPath 3000 Service Manual page 874

wclient.fm
Workpoint Clients
IP Telephony (Voice over IP)
Performance requirement for the Media Gateway (= Gateway HG 1500)
Calculation of the dynamic performance requirement for the DSL connection on the basis of the
highest throughput rates (upstream = 192 Kbps = (192 x 1000) / 8 bps = 24000 bps, Down-
stream = 2048 Kbps = (2048 x 1000) / 8 bps = 256000 bps). The following formulae apply for
1400 byte packet length:
Upstream:
24000 bps
1400 bytes/packet
Data transfer (addi-
tional feature: En-
hanced B Channels
disabled over WBM.)
Payload (additional
feature: Enhanced B
Channels disabled
over WBM.)
The specified performance requirement of 738.0 points is below the 980 total performance
points that the HXGM3 board can provide. The configuration is feasible.
10-78
= 17 packets/sec
Function
DSL connection (without encryption with 1400 bytes packet length,
performance requirement (score) = 96 for 100 packets/sec):
17 packets/sec upstream (192 kbps)
183 packets/sec downstream (2048 kbps)
Voice gateway channel over LAN interface 1 without encryption:
14 x G.711 (received: 20 msec/sent:
20 msec)
Downstream:
256000 bps
1400 bytes/packet
Total =
P31003-H3550-S403-4-7620, 02/05
HiPath 3000 V5.0, HiPath 5000 V5.0, Service Manual
= 183 packets/sec
Resource require-
ment
(credit point)
17 x (96 / 100) = 16.32
183 x (96 / 100) =
175.68
14 x 39.0 = 546.0
738.0