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Cisco Unified SCCP and SIP SRST System Administrator Guide
OL-13143-04
Configuring Call Handling
Revised: November 14, 2011
This chapter describes how to configure Cisco Unified Survivable Remote Site Telephony (Cisco Unified
SRST) for incoming and outgoing calls for SCCP phones.
This chapter also describes support for standardized RFC 3261 features for SIP phones. Features include
call blocking and call forwarding.
Note
Configuring Call Handling for SIP phones applies to versions 4.0 and 3.4 only.
Contents
•
Prerequisites for Configuring SIP SRST Features Using Back-to-Back User Agent Mode, page 123
•
Restrictions for Configuring SIP SRST Features Using Back-to-Back User Agent Mode, page 124
•
Information About Configuring SCCP SRST Call Handling, page 124
•
Information About Configuring SIP SRST Features Using Back-to-Back User Agent Mode,
page 125
•
How to Configure Cisco Unified SCCP SRST, page 127
•
How to Configure Cisco Unified SIP SRST, page 164
•
How to Configure Optional Features, page 174
•
Where to Go Next, page 176
Prerequisites for Configuring SIP SRST Features Using
Back-to-Back User Agent Mode
•
Complete the prerequisites documented in the
“Prerequisites for Configuring Cisco Unified SIP
SRST” section on page 19
section in the
“Cisco Unified SCCP and SIP SRST Feature Overview”
section on page 11
.
•
Configure the SIP registrar. The SIP registrar gives users control of accepting or rejecting
registrations. To configure acceptance of incoming SIP Register messages, see the
“Setting Up
Cisco Unified IP Phones using SIP” section on page 105
.