VoIP gateway IP400 version 5.01
Page 103
than 4 seconds have elapsed since the last digit was dialled. The call is then
switched and any digits subsequently dialled are ignored.
7.2.11 Routes from and to fax machines
With version 2 of your gateway's firmware it was possible to assign certain map
entries to fax connections. This made it possible to force the usage of the appro-
priate G.726 encoder for the transmission of Group 3 faxes.
This function (
Fax
(
force G726 40 Kbit
/
s coder
)) is no longer available from
version 3 of the firmware onwards, since faxes can be reliably transmitted using
the T.38 protocol (see section 6.1.4 “H.323 protocol options” from page 73).
If you update a version 2 configuration to version 3 or higher, you merely need to
check the
Enable T.38 fax protocol
box in the relevant gateway definitions in
the
VoIP Interfaces
area.
7.2.12 Suppressing echo compensation
Your gateway implements
echo cancellation
for all voice connections that ter-
minate on a local ISDN interface. Echo compensation is automatically not carried
out for data and fax connections. In rare cases though, in may be that no echo
compensation is to be performed even though a connection is treated as a voice
connection. This can be the case, for example, with modem connections.
You can suppress echo compensation by checking the
Disable echo canceler
box in the relevant
Map
entry.
