Restrictions For Configuring Cisco Unified Sccp Srst - Cisco CP-7911G-CH1 System Administrator Manual

Cisco Unified SCCP and SIP SRST Feature Overview

Restrictions for Configuring Cisco Unified SCCP SRST

Table 1
Cisco Unified SCCP SRST.
Table 1 Restrictions from Cisco SCCP SRST from the Present Version to Version 1.0
Cisco Unified SRST Cisco IOS
Version Release
Version 4.1 12.4.(15)T
OL-13143-04
provides a history of restrictions from Cisco SCCP SRST Version 1.0 to the present version of
Restrictions
• Enhanced 911 Services for Cisco Unified SRST does not interface with the Cisco
Emergency Responder.
The information about the most recent phone that called 911 is not preserved after
•
a reboot of Cisco Unified SRST.
Cisco Emergency Responder does not have access to any updates made to the
•
emergency call history table when remote IP phones are in Cisco Unified SRST
fallback mode. Therefore, if the PSAP calls back after the Cisco Unified IP phones
register back to Cisco Unified Communications Manager, Cisco Emergency
Responder will not have any history of those calls. As a result, those calls will not
get routed to the original 911 caller. Instead, the calls are routed to the default
destination that is configured on Cisco Emergency Responder for the
corresponding ELIN.
For Cisco Unified Wireless IP Phone 7920 and 7921, a caller's location can only be
•
determined by the static information configured by the system administrator. For
more information, see the
911 Services.
• The extension numbers of 911 callers can be translated to only two emergency
location identification numbers (ELINs) for each emergency response location
(ERL).
Using ELINs for multiple purposes can result in unexpected interactions with
•
existing Cisco Unified SRST features. These multiple uses of an ELIN can include
configuring an ELIN for use as an actual phone number (ephone-dn, voice register
dn, or FXS destination-pattern), a Call Pickup number, or an alias rerouting
number. For more information, see the
Enhanced 911 Services.
• There are a number of other ways that your configuration of Enhanced 911 Services
can interact with existing Cisco Unified SRST features and cause unexpected
behavior. For a complete description of interactions between Enhanced 911
Services and existing Cisco Unified SRST features, see the
Existing Cisco Unified SIP SRST Features" section on page
Precautions for Mobile Phones
Multiple Usages of an ELIN
Cisco Unified SCCP and SIP SRST System Administrator Guide
Cisco Unified SCCP SRST
in Configuring Enhanced
in Configuring
"Interactions with
106.
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