4-6
Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (SIP)
OL-3410-01
Chapter4 Basic and Additional SIP Services
Additional SIP Services
Dial Plan
You can set specific dial plan rules and timeout values. Many of these values are determined on a
country-by-country basis.
Related Parameter
DialPlan, page 5-38
Disabling Access To The Web Interface
To prevent tampering and unauthorized access to the CiscoATA configuration, the Cisco ATA built-in
web server can be disabled.
Related Parameter
OpFlags, page 5-34—Bit 7
Distinctive Ringing
This feature allows a user to identify a caller based on the ringing pattern the user selects for the
incoming number.
This feature is dependent on the proxy or remote UA, including t he Alert-Info header with the
appropriate value in the INVITE message. The Cisco ATA supports standard distinctive ringing pattern
1 to 5 as defined in the standard GR-506-CORE.
The following Alert-Info header values are allowed:
•Bellcore-dr1
•Bellcore-dr2
•Bellcore-dr3
•Bellcore-dr4
•Bellcore-dr5
If the Alert-Info header value is not recognized, the Cisco ATA plays the regular ring tone, Bellcore-dr1.
Note The Bellcore-dr5 ringing pattern is the same as the Bellcore-dr1 ringing pattern.
DNS SRV Support
The Cisco ATA supports DNS SRV lookup for the SIP proxy server. If the GkOrProxy parameter value
begins with _sip._udp. or sip.udp., the Cisco ATA performs a DNS SRV lookup for the SIP proxy server.
A DNS SRV lookup results in one of the following conditions:
•Zero host is returned or DNS SRV lookup failed. The Cisco ATA then performs a regular DNS
A-record lookup for the given name.
•One host is returned. The single host is used as the primary p roxy and AltGk is the backup proxy,
if specified.