Asterisk integration with Cisco Unified Communication Manager using SIP Trunk

Today we are gonna integrate Asterisk with Cisco Unified Communications Manager.

Below is the setup:

Configuration on CUCM:

Configure Cisco IP Communicator with the TFTP address and copy the 'Device Name'.

Create a phone in CUCM:


CUCM application -> Device -> Phone -> Add New

Phone Type: Cisco IP Communicator

Select the device protocol: SIP

Device Name: Enter the Device Name copied on Cisco IP Communicator

Below are mandatory fields has to be filled in while Cisco IP Communicator

Device Pool:
SIP Profile:
Phone Button Template:
Device Security Profile:


Create SIP Trunk:

Mention the IP address of Asterisk for registraton

Create a Route Pattern:

Asterisk Extensions starts with patter 98XXX. Hence the pattern is managed as below with the Gateway as 'Asterisk' SIP Trunk.

  Now we are going to manage ASTERISK:
 SIP extensions and SIP trunk has to be created on /etc/asterisk/sip.conf

Calls has to reach the extensions when dialed. So a dialplan has to be managed in /etc/asterisk/extension.conf

Note: I will explain in details about the sip.conf and extension.conf in a later post.

Registering XLite on Asterisk with the credentials configured in sip.conf

Asterisk SIP registration status

That's it. We are good to make a call.


Calling from Cisco IP communicator to Asterisk extension

Please find the configuration as text for your reference:


/etc/asterisk/sip.conf:


;Asterisk extensions
[98001]
secret=1234
context=cisco
qualify=yes
type=friend
host=dynamic


[98002]
secret=1234
context=cisco
qualify=yes
type=friend
host=dynamic


;SIP Trunk to Cisco
[fromcisco]
type=friend
qualify=yes
allow=all
nat=no
insecure=very
host=10.1.1.25
context=cisco
dtmfmode=rfc2833


register=>cisco@10.1.1.25

/etc/asterisk/extension.conf


[cisco]
exten => _98XXX,1,AGI(lookup.agi)
exten => _98XXX,n,Set(CALLERID(name)=${lookupcid})
exten => _98XXX,n,Dial(SIP/${EXTEN},5)
exten => _98XXX,n,Voicemail(${EXTEN}@default)
exten => _98XXX,n,Hangup()


exten => 99999,1,VoiceMailMain()


exten => _7XXXX,1,Dial(SIP/fromcisco/${EXTEN},20)
exten => _7XXXX,n,Hangup()


Hope you find a good time :)


Thanks,
Asterisk Techs Team