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CUCME 8.6 Interconnection with another PBX System


Hope you are doing great.

I would like a little help here with something.

There is a customer (COMPANY “A”) which is using Cisco Call Manager Express 8.6.

On the same building, there is another internal company (COMPANY “B”)with is using a Linux based PBX system.

My question is, is it possible to integrate these two companies in terms of telephony services?

I mean…

Company “A” got its dial patterns…company “B” either.

Is it possible to add another dial-peer to this problem?

dial-peer voice 2 pots

description ConnectionToOtherCompany

destination-pattern 883..    (Example)

port 0/1/0                       ß Which will be the port? I must connect another cable to the Router, my question is if this is on the Ethernet Interfaces?

forward-digits 9

The same will be done on the other PBX system…

But my question now is regarding to the CME router, cause this is where I will step in.


This is only for internal calls on BOTH companies.

Edson Vuma       

-- Regards Edson Vuma

CUCME 8.6 Interconnection with another PBX System


It's possibile through a SIP trunk between those two systems and configuring appropriate call routing and codec negotiation.

A possible dialpeer could be

dial-peer voice 10 voip

destination-pattern 883T

session-protocol sipv2

session-target ipv4:x.x.x.x:5060 (x.x.x.x is the ip address of the other PBX)

dtmf-relay rtp-nte

codec g711ulaw

no vad

If the other PBX requires sip authentication, you can define it under sip-ua configuration section on the CME

Before you start the integration, I suggest you to upgrade your system to the latest available IOS version

Please refer to the following link to have an idea.




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Re:CUCME 8.6 Interconnection with another PBX System

Does the Linux based support SIP/h.323, if yes then check if the PBX is reachable from router by pinging it.

Then you use the Ethernet cable to connect from your router to the PBX.

Create a VoIP dial-peer pointing to the PBX with the destination ip-address for eg:

On the router

Dial-peer voice 1 VoIP
Destination-pattern 8.... >>>>>{num-plan of PBX}
Session target Ipv4: >>>>{ip-add of PBX}
Dtmf-relay h245-alpha
Codec G711ulaw
No bad

It gig 0/0
H-323 VoIP interface
H-322 VoIP bind source add

Note: Do disable toll fraud and IP connectivity :

Kindly rate the post accordingly


Sent from Cisco Technical Support Android App

Community Member

Re:CUCME 8.6 Interconnection with another PBX System

Thanks, guys.

Checking this ASAP.

Warm regards,


-- Regards Edson Vuma
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