Specifications
Configuring the SIP Registrar
How to Configure the SIP Registrar
26
Cisco Unified SIP SRST 4.0 System Administrator Guide
What to Do Next
For incoming SIP Register messages to be successfully accepted, users must also set up a voice register
pool. See the “Configuring Backup Registrar Service to SIP Phones” section on page 26.
Configuring Backup Registrar Service to SIP Phones
Backup registrar service to SIP IP phones can be provided by configuring a voice register pool on SIP
gateways. The voice register pool configuration provides registration permission control and can also be
used to configure some dial-peer attributes that are applied to the dynamically created VoIP dial peers
when SIP phone registrations match the pool. The following call types are supported:
• SIP IP phone to or from
–
local PSTN
–
local analog FXS phones
–
local SIP IP phone (using VoIP-to-VoIP dial-peer redirect)
The commands in the configuration below provide registration permission control and set up a basic
voice register pool. The pool gives users control over which registrations are accepted by a Cisco Unified
SIP SRST device and which can be rejected. Registrations that match this pool create VoIP SIP dial peers
with the dial-peer attributes set to these configurations. Although only the id command is mandatory,
this configuration example shows basic functionality.
Note For command-level information, see the appropriate command page in the Cisco Unified SRST and
Cisco Unified SIP SRST Command Reference (All Versions).
Prerequisites
• The SIP registrar must be configured before a voice register pool is set up. See the “Configuring the
SIP Registrar” section on page 24 for complete instructions.
Step 5
registrar server [expires [max
sec
] [min
sec
]]
Example:
Router(conf-serv-sip)# registrar server expires
max 600 min 60
Enables SIP registrar functionality. The keywords and
arguments are defined as follows:
• expires: (Optional) Sets the active time for an incoming
registration.
• max sec: (Optional) Maximum expiration time for a
registration, in seconds. The range is from 600 to
86400. The default is 3600.
• min sec: (Optional) Minimum expiration time for a
registration, in seconds. The range is from 60 to 3600.
The default is 60.
Step 6
end
Example:
Router(conf-serv-sip)# end
Returns to privileged EXEC mode.
Command or Action Purpose