Access To Hipath 3750, Hipath 3700 - Siemens HiPath 3000 Service Manual

10.6.4.4.3 Calculation Example 3: 200 IP Workpoint Clients and Internet Access to
HiPath 3750, HiPath 3700
200 IP workpoint clients should be connected to HiPath 3750 or HiPath 3700. As described in
Table 10-9, 28 gateway channels are required for 200 IP workpoint clients (0.1 erlangs/work-
point client). In addition, a DSL connection with 192 Kbps upstream (from HG 1500 –> Inter-
net) and 2048 Kbps downstream (Internet –> HG 1500) should be configured. The firewall
should be activated here but not encryption.
Two HXGM3 boards are required for this configuration:
2 DSPs per HXGM3 = 2 x 2 DSPs = 4 DSPs, which together support up to 32 channels.
Performance requirement for the Signaling Gateway (= Gatekeeper HG 1500)
G.711 is required for IP workpoint client connections. The firewall must be activated for the DSL
connection. For this reason the calculation method with the WBM setting "Enhanced B Chan-
nels" deactivated should be used for the 14 gateway channels on each HXGM3.
The signaling load has to be taken into account when calculating performance.
Signaling without
H.235 security (inde-
pendent of the WBM
setting "Enhanced B
Channels")
Payload (additional
feature: Enhanced B
Channels disabled
over WBM.)
The specified performance requirement of 648.0 points is below the 980 total performance
points that the HXGM3 board can provide. The configuration is feasible.
P31003-H3550-S403-4-7620, 02/05
HiPath 3000 V5.0, HiPath 5000 V5.0, Service Manual
Function
200 x IP workpoint client: System client, HFA
client, H.323 client (eight calls an hour)
Voice gateway channel over LAN interface 1 without encryption:
14 x G.711 (received: 20 msec/sent:
20 msec)
Workpoint Clients
IP Telephony (Voice over IP)
Resource require-
ment
(credit point)
200 x 0.51 = 102.0
14 x 39.0 = 546.0
Total = 648.0
wclient.fm
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