How to Configure SIP Trunk to Service Provider Network?

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In this article we will cover the sample configuration for configuring the SIP Trunk to more than one Service provider on Cisco Unified Border Element (CUBE).


There are two parts in this article: Sample configuration & Requirement from SIP Trunk Service Provider

Sample Configuration

interface loopback1
 ip address

interface loopback2
 ip address

dial-peer voice 1 voip
 description “Primary path to sip sp-1”
 destination-pattern 91[2-9]……
 session protocol sipv2
 session target ivp4:
 voice class sip options-keepalive
 voice-class sip bind control source-interface loopback1
 voice-class sip bind media source-interface loopback1

dial-peer voice 2 voip
 description “secondary path to sip sp-2”
 destination-pattern 91[2-9]…..
 session protocol sipv2
 session target ipv4:
 preference 2
 voice-class sip options-keepalive
 voice-class sip bind control source-interface loopback2
 voice-class sip bind media source-interface loopback2

Note: Dual SPs can be used for outbound calls.


More Tech Note Here:  Information you require from SP while Provisioning SIP Trunk

What you should get from the Service Provider for provisioning SIP Trunk

Requirement from SIP Trunk Service provider

1. SIP Trunk IP Address ie Destination IP address for INVITES.  For example – or DNS
2. SIP Trunk Port Number ie Destination port number for INVITES. – 5060
3. SIP Trunk Transport layer (TCP/UDP)  – UDP
4. Codecs supported  – G711, G729
5. Fax protocol support. For example – T.38
6. DTMF signaling mechanism. For example – RFC2833
7. Does the provider require SDP information in initial INVITE (Early offer required) – Yes
8. SBC’s External IP address that is required for service provider to accept/authenticate calls ie source ip address for INVITE –
9. Does SIP require SIP Trunk registration for each DID? If yes what is the username and password. 
10. Does SIP require Digest Authentication? If yes what is the username and password.

Information you require from SP while provisioning SIP Trunk

More Related Information about CUCM with CUBE Configuration: CUCM with CUBE Configuration Example


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