Am 21.10.2019 um 07:40 schrieb Christian Berger <christian(a)clarke-3.de>de>:
On 20.10.19 23:14, Ingo Jürgensmann wrote:
So, basically it is working. Cisco documentation
for fax setup in voice routers states that no more than 14.4k is supported.
Cisco
is probably referring to T.38 which is something completely
different. Cisco is actually one of the worst companies in regards to
SIP. They speak weird edge-cases of the protocol and force G.729 onto
their users.
T.38 actually is a protocol you could have a lot of fun with as it's
fairly complicated, but flexible and has lots of broken implementations
even on devices like the AVM Fritz!Box. There are Fax machines which
will refuse to work with T.38 on a Fritz!Box as they will reliably
trigger that bug.
Well, the main argument in my previous mail was not Cisco but that modem connections are
basically working via SIP connections, although you might not get your desired connection
speed. Distance between both locations were >450km.
So, as previously stated: I think it’s worth to collect some more experience on 36c3,
although I know as well that many BBS/FTN sysops are still receiving calls via phones
lines (behind IP) and it’s working.
:-)
--
Ciao... //
http://blog.windfluechter.net
Ingo \X/ XMPP: ij(a)jabber.windfluechter.net
gpg pubkey:
http://www.juergensmann.de/ij_public_key.asc