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FAX on SIP

danplacek
Level 4
Level 4

Does anyone have this working?

We have had a lot of trouble with it... ironically its T.38 that causes all the problems.

If we force G711 in the config... outgoing faxes work fine... but incoming seem to be auto-negotiated to T.38 and fail nearly 100%.

If its set for T.38 the outgoing fails most of the time as well. This seems very counter-intuitive.

We have had Fax over SIP working pretty well on the UC500 platform (for customers with good internet connections anyway), but the UC320 just doesn't seem to be able to do it.

Any thoughts on this would be appreciated.

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