Installation guide

Example of Configuring a SIP Trunk to CUCM
Acano solution: Deployment Guide R1.2 76-1006-06-K
Page 74
Appendix G Example of Configuring a SIP Trunk
to CUCM
This appendix provides an outline how to set up a SIP Trunk between the Acano Core and a
Cisco Unified Communications Manager (CUCM). It assumes that you are familiar with CUCM.
Prerequisites
This section assumes that you have followed section 4.4; that is:
 You have specified a listening interface using the MMP callbridge listen command.
 If you will use TLS, you have configured certificates to use with the callbridge certs
command.
CUCM has some requirements on what TLS certificates it will accept. You should ensure
that the certificate on the Acano Server has the SSL Client and SSL server purposes
enabled. This is done during the certificate signing stage. Appendix C step 3 (and Appendix
D) may require some changes for this: instead of "CertificateTemplate:WebSever" create
and use a different template.
Use openSSL to see whether the existing certificate is OK; for example:
openssl x509 -in <certificatename> -noout -text –purpose
The important lines in the output are "SSL client" and "SSL server" which must have a Yes,
for example:
Certificate purposes:
SSL client : Yes
SSL client CA : No
SSL server : Yes
Acano solution Configuration
1. In the Web Admin Interface, go to Configuration > Outbound Calls.
2. In the blank row, for Domain, enter the domain that will be matched for calls that need to be
sent to CUCM.
3. For SIP Proxy to Use, do one of the following:
 Leave this field blank and the server will perform a DNS SRV lookup for the called
domain using _sip._tls.<yourcucmdomain>.com. If this fails to resolve the server
will try a lookup using TCP an then UDP.
 Enter the CUCM FQDN and the server will perform a DNS SRV lookup for that defined
domain