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VG224 fax issue

Analog Phone->VG224(MGCP)--CCM4.1(3)--3725(MGCP)--PSTN

Analog works fine, can dial any PSTN number and from the PSTN can the analog phone. But when I connect a fax machine to the VG224, and try from IP Phone dial the fax number, there is no fax dial tone. When I try to send a fax, I can hear remote site site sending fax tone, and then about 10 seconds later the fax get comm error.

eptpos does not work either when connecting to VG224.

Here is the related configuration:


version 12.4

voice-port 2/0

echo-cancel coverage 32

cptone AU

timeouts call-disconnect 5

timeouts ringing 360

timeouts wait-release 5

impedance complex1


ccm-manager fallback-mgcp

ccm-manager redundant-host X.X.X.X

ccm-manager mgcp

ccm-manager config



mgcp request timeout 2000

mgcp call-agent service-type mgcp version 0.1

mgcp dtmf-relay voip codec all mode out-of-band

mgcp rtp unreachable timeout 1000 action notify

mgcp modem passthrough voip mode nse

mgcp modem passthrough voip codec g711alaw

mgcp package-capability rtp-package

no mgcp package-capability res-package

mgcp package-capability sst-package

no mgcp timer receive-rtcp

mgcp sdp simple

no mgcp fax t38 ecm

mgcp fax t38 inhibit


mgcp profile default



dial-peer cor custom




dial-peer voice 200 pots

service mgcpapp

destination-pattern 8001

fax rate disable


port 2/0

forward-digits all



Appreciate any advice.

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