Fax over IP... confused!

Unanswered Question
Apr 1st, 2008
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Hi guys,


I'm very confused about how fax relay works in a Cisco VoIP environment. I've read all the documents I could find, but questions remains.


Do I have to apply the directives on a dial-peer with the destination-pattern set as the fax extension number ?

Or does the system automatically detects if the call is a voice call or a fax call ?


In fact, I don't quite understand how I can define what devices should use fax relay (cisco protocol, not t38)


Here's an example of what I've done so far.


37002 is the extension number of a fax in a remote office.


dial-peer voice 37002 voip

destination-pattern 37002

fax-relay ecm disable

fax-relay sg3-to-g3

fax protocol cisco



Is that right ?


Thanks !

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Kenneth Mohammed Tue, 04/01/2008 - 11:25
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you may want to add the ip address of the remote gateway you are sending to under the dial-peer


session target ipv4: [ip address of remote gateway]

leonardolopes Tue, 04/01/2008 - 14:15
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Hi,


The dial-peer not detected which device delivery the call


You have insert the destination for each device

for example:


dial-peer voice 1234 voip

destination-pattern 1234

session target ipv4: 192.168.1.1


or


dial-peer voice 1234 pots

destination-pattern 1234

voice-port 0/0/0


do you understand?

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