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ATA 187 not sending or receiving faxes

We recently purchased a few 187s, since the tried and true 186 and the equally awesome 188s are no longer available.  (I can't be the only one who loved the backplane on the 188s, why did they stop making them like these?) 

I can make and place calls through the 187s but when it comes to sending and receiving faxes, both within my voip network or out of the PRIs, I get nothing. I configured the devices for fax pass-through thinking the t38 relay might have been the problem but that didn't do a thing.

I am running UCM 8.6.2.2 with MGCP gateways going through 2 X6600 CMMs in my 6509.  Here is the MGCP configuration on each CMM.

mgcp

mgcp call-agent 172.16.3.XXX 2427 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 package-capability rtp-package

no mgcp package-capability res-package

mgcp package-capability sst-package

mgcp package-capability pre-package

no mgcp timer receive-rtcp

mgcp sdp simple

mgcp rtp payload-type g726r16 static

!

mgcp profile default

!

Thoughts?  Thanks in advance.

Everyone's tags (3)
2 REPLIES
New Member

ATA 187 not sending or receiving faxes

Can't tell re MGCP, but in my case (Xerox 7228 fax) I had to enable t38 on outgoing and disable on incoming and fix fax rate to 9600. Also there was an issue with Impedance - as it seems Cisco has default of USA, and some EU phones/faxes might need a different setting. In my case 270ohms + 750ohms || 150nF works better.

Here is link to Xerox doc that talk about fax over IP - see if that gives any ideas for you. http://www.office.xerox.com/support/dctips/dc08cc0439.pdf

here is weird conf on gw that works for me:

! out

dial-peer voice 300 voip

no modem passthrough

session target ipv4:192.168.25.1

incoming called-number 0T

voice-class codec 1

voice-class h323 1

dtmf-relay h245-alphanumeric

fax-relay sg3-to-g3

fax nsf 000000

fax protocol t38 version 0 ls-redundancy 5 hs-redundancy 2 fallback pass-through g711ulaw

no vad

! in

dial-peer voice 200 voip

destination-pattern 5..

session target ipv4:192.168.25.1

voice-class codec 1

voice-class h323 1

dtmf-relay h245-alphanumeric

fax-relay sg3-to-g3

fax nsf 000000

fax protocol pass-through g711ulaw

no vad

Silver

ATA 187 not sending or receiving faxes

Also check the firmware on the ATA 187, go for the latest.

This model has driven me nuts! So many problems.

Missing the 186

JH

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