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P31003-H3550-S403-4-7620, 02/05
HiPath 3000 V5.0, HiPath 5000 V5.0, Service Manual
10-71
Workpoint Clients
IP Telephony (Voice over IP)
10.6.4.2.5 ISDN Routing/PPP Channels
HG 1500 boards can also be used as ISDN routers. The ISDN router can connect two physi-
cally separate IP networks together via an ISDN line. Channel bundling can be used to adjust
the required bandwidth.
The system reserves the B channels required for ISDN routing and thus restricts the available
gateway channels.
If a large number of IP workpoint clients is required, the HG 1500 board may not also be used
as an ISDN router. In this case, ISDN routing functionality must be assigned to an individual
HG 1500 board.
10.6.4.2.6 Fax / Modem Channels
Fax and modem transmissions can be sent both over transparent G.711 gateway channels and
T.38 channels (fax only).
Although T.38 offers the more reliable method of fax transmission, it can only be used to a max-
imum of 14 Kbps. The number of T.38 channels available is limited by the higher processor
speed required for T.38. Alternatively, G.711 gateway channels can be used for fax transmis-
sion.
Note: The number of G.711 gateway channels available is reduced as soon as the DMC inter-
working feature is activated with HiPath 3000 Manager E.
Table 10-10 HG 1500 - Board-Specific Sum of PPP Channels and Gateway Channels
(Maximum Numbers)
HXGM3 HXGS3
HXGR3
STMI2
with-
out
PDM1
with 1
x
PDM1
with 2
x
PDM1
with-
out
PDM1
with 1
x
PDM1
without
PDMX
1
1 PDMX is not currently released.
Sum of PPP channels (for ISDN
routing) and gateway channels
16 24 32 8 16 32
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