[cisco-voip] refining dial peers for Fax

['Jonatan Quezada']

we are finding that after our sip cutover, that our faxes are happiest
signalling over a T1 connection that originally we were trying to get away
from, however trouble shooting was terrible and we are moving past having
all voice traffic on the SIP trunk.

Currently we are signalling for voice( calls ) only on the trunk and fax
traffic can come in and out via that T1.

My question is , still every so often we are seeing fax drops and
incomplete page transmissions.

looking at the controller the interface is solid no slips and seems to
negotiate the connections just fine. but again every so often there are
drops or sending fails altogether.

We are wanting to try limiting the transmission rates but on the ATA190 and
191s you cannot rate limit on the device. It sounds like this needs to done
at the dial peer level. if so what is the best starting configuration for
the dial peers that will handle on ly fax and go out a certain gateway that
has the T1 on it?

https://www.cisco.com/c/en/us/support/docs/voice-unified-communications/unified-border-element/115742-fax-modem-call-flows-00.html

Im looking at this call flow

Telco - PRI - GW - MGCP - CUCM - SIP - ATA187 - Fax/Modem
<https://www.cisco.com/c/en/us/support/docs/voice-unified-communications/unified-border-element/115742-fax-modem-call-flows-00.html#anc7>

except the ATAs are 190 and 191s

If we go the dial peer route, since the DID are not contiguous I will need
a dial peer for each one huh?








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Johnny Q
Voice Technology Analyst - TelNet
Chemeketa Community College
Johnny.Q at chemeketa.edu
Building 22 Room 131
Work 5033995294
Mobile 9712182110
SIP 5035406686
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