CallManager Express Version
Cisco Unified CME 8.0 or higher is required
Configure CSTA protocol
The configuration of the CallManager for using CSTA can be done manually or assisted by the estos ECSTA for CallManager Express. On the page 'Line Settings' you will find the 'CallManager Configuration' in 'Extras'.
CTI will be enabled, the SIP Registrar will be enabled and a Session Server (here number 2) will be configured for use by the ECSTA.
enable configure terminal
voice service voip allow-connections sip to sip no cti shutdown gcid no cti csta mode basic sip registrar server expires max 1800 min 60 exit exit voice register global mode cme exit voice register session-server 2 cti-aware register-id ss_ecsta keepalive 600 exit
ephone-dn 1 cti watch cti notify exit
Configure Security (optional):
You may optionally configure authentication for the Session Server registration. In case this authentication is enabled, all SIP registrations require a username and password. In case this authentication is enabled, the ECSTA uses the AXL credentials. Before enabling authentication please check if any other applications and devices connected to the CME also support this.
voice register global authenticate register exit
Attention: In older versions it was possible to operate the CSTA communication without Session Server. In case you just updated the ECSTA, you have to check the CME configuration.
Detailed instructions for the configuration of the phones and CSTA can be found in the Cisco CallManager Express Administration guide.