Siemens HiPath 3000 Series, Сервисная документация

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System Data
Nur für den internen Gebrauch
A31003-H3590-S100-7-7620, 06/2012
2-52
HiPath 3000/5000 V9, Service documentation
sysdat.fm
Static Configuration Rules
2.4.9 Fax/Modem Channels
It is possible to transmit faxes with Internet telephony both via G.711 gateway channels and, in
HiPath 3000/5000 V7 R4 or later, via T.38 channels.
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, E.711 gateway channels can be used for fax transmis-
sions (not for Internet telephony).
Technical restrictions in Internet telephony mean that modem transmissions are not possible.
Note: The number of G.711 gateway channels available is reduced as soon as the DMC inter-
working feature is activated with HiPath 3000/5000 Manager E.
Internet-based fax transmissions that use G.711 frequently fail or incur errors. For this reason,
fax transmission via Internet telephony and G.711 is not supported. If the provider supports the
T.38 protocol, T.38 must be activated on the gateway. Otherwise, transmission must be via IS-
DN. The number of possible fax connections that can be routed simultaneously depends on the
hardware used.
The switchover from G.711 to T.38 takes place in WBM.