After upgrading to R10.8.1.E we are having a problem with incoming faxes. The phone number is an SIP alias from our SIP provider. The FAX machine is hooked to FXS 2/4. If I put an analog phone on the the FXS port, the phone does ring, but the FAX machine does not pickup. Is there some option or feature that I need to set on this User Account so that the FAX machine will detect the call?
Here is the user config:
Nettech_NV7100#show running-config voice user 394
Building configuration...
!
!
!
voice user 394
connect fxs 2/4
cos "normal_users"
first-name "Fax"
last-name "Nettech-Main"
password "1234"
no call-waiting
no fwd-courtesy
no special-ring-cadences
no message-waiting
num-rings 6
sip-identity 8148365228 T05
sip-authentication password "1234"
modem-passthrough detection-time 0
t38
no alc
no nls
no echo-cancellation
codec-list g711_first
no voicemail new-user
voicemail auth-mode password
no voicemail auto-play
no voicemail envelope-play
voicemail password "1234"
voicemail notify schedule Sunday 12:00 am
!
!
end
First thing is try changing the Detection Timespan from 0 to 8 seconds. The default should be 8, so not sure why yours it set to 0.
If that doesn’t work, then you might want to disable Modem Passthrough and manually set up the port to receive a fax.
Create a G.711ulaw only codec list and assign it to the interface and then make sure VAD and Echo Cancellation are turned off.
That should take care of it. Post back was fixed it.
More info on those settings;
Modem Passthrough
When Modem Passthrough is enabled and an existing call detects a modem or fax tone, the
unit will automatically renegotiate with the far end to be modem-compatible (switch to
G.711 codec automatically, echo cancellation and VAD are disabled). When connecting
analog port to a fire alarm system, DO NOT use modem passthrough. Manually assign a
G711 only codec, then disable VAD and echo cancellation.
Detection Timespan
Specifies the fax and/or modem detection time length value. Recommend starting with 8
seconds. Range is 0-8 Seconds
-Mark
First thing is try changing the Detection Timespan from 0 to 8 seconds. The default should be 8, so not sure why yours it set to 0.
If that doesn’t work, then you might want to disable Modem Passthrough and manually set up the port to receive a fax.
Create a G.711ulaw only codec list and assign it to the interface and then make sure VAD and Echo Cancellation are turned off.
That should take care of it. Post back was fixed it.
More info on those settings;
Modem Passthrough
When Modem Passthrough is enabled and an existing call detects a modem or fax tone, the
unit will automatically renegotiate with the far end to be modem-compatible (switch to
G.711 codec automatically, echo cancellation and VAD are disabled). When connecting
analog port to a fire alarm system, DO NOT use modem passthrough. Manually assign a
G711 only codec, then disable VAD and echo cancellation.
Detection Timespan
Specifies the fax and/or modem detection time length value. Recommend starting with 8
seconds. Range is 0-8 Seconds
-Mark
Mark,
Those settings were a carry over from the original pre-R10.5.3 config. After adjusting those settings and rebooting the fax machine, everything appears to be working normally. Thanks
Jim