Cisco Unified SIP SRST 4.1
Information About Cisco Unified SIP SRST 4.1
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Cisco Unified SCCP and SIP SRST System Administrator Guide
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When you reset a phone, the phone requests its configuration files from the TFTP server, which builds
the appropriate configuration files depending on the type of phone.
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Cisco Unified IP Phone 7905 and 7912: The dial plan is a field in their configuration files.
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Cisco Unified IP Phone 7911G, 7940, 7941G, 7941GE, 7960, 7961G, 7961GE, 7970G, and
7971GE: The dial plan is a separate XML file that is pointed to from the normal configuration file.
The Cisco Unified SRST supports SIP dial plans if they are provisioned in
Cisco Unified Communications Manager. You cannot configure dial plans in Cisco Unified SRST.
Caller ID Display
The name and number of the caller is included in the Caller ID display on the
Cisco Unified IP Phone 7911G, 7941G, 7941GE, 7961G, 7961GE, 7970G, and 7971GE. Other SIP
phones display only the number of the caller. Also, the caller ID information is updated on the
destination phone when there is a change in the caller ID of the originating party such as with call
forwarding or call transfer. No new configuration is required to support these enhancements.
Disabling SIP Supplementary Services for Call Forward and Call Transfer
If a destination gateway does not support supplementary services, you can disable REFER messages for
call transfers and redirect responses for call forwarding from being sent by Cisco Unified SRST.
Disabling supplementary services is supported if all endpoints use SCCP or all endpoints use SIP. It is
not supported for a mix of SCCP and SIP endpoints.
Idle Prompt Status
A message displays on the status line of a SIP phone after the phone registers to Cisco Unified SRST to
indicate that Cisco Unified SRST is providing fallback support for the Cisco Unified Communications
Manager. This message informs the user that the phone is operating in fallback mode and that not all
features are available. The default message that displays “CM Fallback Service Operating” is taken from
the phone dictionary file. You can customize the message by using the
system message
command on the
Cisco Unified SRST router. Cisco Unified SRST updates the idle prompt message when a SIP phone
registers or when you modify the message through the configuration. The message displays until a phone
switches back to the Cisco Unified Communications Manager.
The idle prompt status message is supported for the Cisco Unified IP Phone 7911G, 7941G, 7941GE,
7961G, 7961GE, 7970G, and 7971GE with Cisco Unified SRST 4.1 and later versions. For versions
earlier than Cisco Unified SRST 4.1, the phones display the default message from the dictionary file.
Enhanced 911 Services
Enhanced 911 Services for Cisco Unified SRST enables 911 operators to:
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Immediately pinpoint the location of the 911 caller based on the calling number
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Callback the 911 caller if a disconnect occurs
Before this feature was introduced, Cisco Unified SRST supported only outbound calls to 911. With
basic 911 functionality, calls were simply routed to a Public Safety Answering Point (PSAP). The 911
operator at the PSAP would then have to verbally gather the emergency information and location from
