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New Member

Any restrictions for FAX T.38 Transmission in a VoIP/POTS Network?

Hi all,

the Problem is to send a FAX in this scenario:

FAX-POTS>3640-T38>AS5300-POTS>AS5400-T38>3640-POTS>FAX

but in this scenarios it works:

1.) FAX-POTS>3640-T38>3640-POTS>FAX

2.) FAX-POTS>3640-T38>AS5300-POTS>FAX

The Fax Configurations on all dial-peers:

----

dtmf-relay h245-signal

codec g711alaw bytes 80

fax nsf 000000

fax protocol t38 ls-redundancy 0 hs-redundancy 0

----

h323 signalling is in use

Could be the problem the connections over several VoIP/T38 Networks???

1 REPLY
New Member

Re: Any restrictions for FAX T.38 Transmission in a VoIP/POTS Ne

Strange though, when something similar happened and I could not do anything, by chance I happened to disable and re enable the STP in a couple of the involved switches.....and lo!!! It started working.

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