T.38 Fax, MGCP and SIP

Unanswered Question
Mar 11th, 2009

Hallo,

we have a Callmanager 4.1 with a Fax- and Voicemailserver (Callisto with Capi). The Faxserver is termination on H323 IOS-GW whis the E1 to PSTN.

This works fine.

Now we will upgrade for CUCM61 and will use the Gateway with MGCP. The Callisto Fax-Server now can SIP. Can we use MGCP and SIP simultan on the IOS-GW ? Then the SIP-Trunk on CUCM6.1 works not with T.38.

Any ideas or how do you do that?

MfG

Dieter

I have this problem too.
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Nicholas Matthews Wed, 03/11/2009 - 19:00

If you're switching your H323 gateway to SIP there shouldn't be problems.

If not, I don't understand what you're asking - can you try rewording?

-nick

decbuw007 Thu, 03/12/2009 - 00:37

Hallo,

the Problem is the Faxserver. The old config works over H323 on the IOS-Gateway (Cisco3845), but with MGCP can we not use H.323 on this Gateway simultan. The following routes were open to us:

1. At the Callmanger H.323 Gateway - this does not work 2. At the Callmanager SIP-Trunk with the Faxserver SIP-Version - this does not. For both the call manager switches not to T.38.

Now the question is: can I use the fax server (SIP) on the IOS MGCP gateway to connect?

So, MGCP and SIP simultaneously on the C3845?

mfg

Dieter

Nicholas Matthews Thu, 03/12/2009 - 18:16

Hi Dieter,

You can simultaneously use MGCP and H323 as long as it's not for the same PRI. The same goes with SIP.

-nick

decbuw007 Tue, 03/17/2009 - 07:26

Hallo,

and thank you for the answer, but i have no found an configuration-example for this Szenario.

HICOM - (E1-Qsig) - C3845 - (MGCP) - CUCM6.1 .... C3845 - (SIP) - Faxserver

Nicholas Matthews Tue, 03/17/2009 - 08:08

I would do a Cisco search on two terms:

"HiCom PRI"

"Sip trunk configuration CUCM"

You should find enough configuration examples there to make sense of this. There won't be one guide that has your entire call flow since it is modular.

-nick

Chad Stachowicz Tue, 03/17/2009 - 15:08

I agree, basically each endpoint on the router can be controlled by any one protocol. Therefore you should be reading the guide for that potocol and how to use it for the specific endpoint.

=)

decbuw007 Mon, 03/23/2009 - 01:44

Hallo,

I have tried the following, but that is not part of the sip (dial-peer voice 1028 voip) processed. Where is the error ?

mfg

dieter

!

card type e1 0 0

..

!

isdn switch-type primary-net5

!

voice-card 0

!

!

!

voice service voip

no supplementary-service h225-notify cid-update

fax protocol t38 ls-redundancy 0 hs-redundancy 0 fallback cisco

!

...

!

controller E1 0/0/0

pri-group timeslots 1-31 service mgcp

!

interface GigabitEthernet0/0

...

!

interface Serial0/0/0:15

no ip address

encapsulation hdlc

isdn switch-type primary-net5

isdn incoming-voice voice

isdn bind-l3 ccm-manager

no cdp enable

!

....

!

control-plane

!

!

!

voice-port 0/0/0:15

no echo-cancel enable

echo-cancel coverage 64

cptone DE

!

ccm-manager mgcp

ccm-manager music-on-hold

ccm-manager config server pubphone

ccm-manager config

!

mgcp

mgcp call-agent pubphone 2427 service-type mgcp version 0.1

mgcp dtmf-relay voip codec all mode nse

mgcp package-capability rtp-package

mgcp package-capability sst-package

mgcp package-capability pre-package

mgcp default-package mt-package

mgcp tse payload 102

no mgcp timer receive-rtcp

!

mgcp profile default

!

!

dial-peer voice 1028 voip

destination-pattern 1028

session protocol sipv2

session target ipv4:<-faxserver->

dtmf-relay sip-notify

codec g711alaw

fax protocol t38 ls-redundancy 0 hs-redundancy 0 fallback cisco

ip qos dscp cs5 media

no vad

!

dial-peer voice 100 pots

service mgcpapp

incoming called-number .

direct-inward-dial

port 0/0/0:15

!

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