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Faxing with SIP

Faxing with SIP

(OP)
Hey Tech-tips,

We have just cut-over a customer from PRI to SIP Trunking, utilizing a media gateway to convert from SIP to PRI in order to connect to a Nortel MICS phone system.

Previously (when they were on PRI) they had an ATA hooked up to the jack, and a 56K modem hooked up to a program based fax called TEDS, on a PC. Now that we've switched to the SIP Gateway this has stopped working, we can use the line to call out on an analog phone but it wont work with the fax program, which I think is due to the 56K modem.

Anyone have any idea what we can do to fix it. We've purchased a newer 56K modem in hopes that it may solve the issue, but I'm very doubtful. We know traditional faxing works no problem with an ATA so I think the 56K modem is the problem I'm just not sure a newer version would make any difference.

But from the jack to the 56K modem, it's the same type of signal as before, an analog station connected through an analog modem. The only change is there is now a next level of conversion from digital to IP (PRI to SIP)

So should I start at the provider end or is there a specific 56K modem that is meant for this scenario?

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