Configuring Secure SRST for SCCP and SIP
How to Configure Secure Unified SRST
206
Cisco Unified SCCP and SIP SRST System Administrator Guide
OL-13143-04
Enabling SRST Mode on the Secure Cisco Unified SRST Router
To configure secure SRST on the router to support the Cisco Unified IP Phone functions, use the
following commands beginning in global configuration mode.
SUMMARY STEPS
1.
call-manager-fallback
2.
secondary-dialtone
digit-string
3.
transfer-system
{
blind
|
full-blind
|
full-consult
|
local-consult
}
4.
ip source-address
ip-address
[
port
port
]
5.
max-ephones
max-phones
6.
max-dn
max-directory-numbers
7.
transfer-pattern
transfer-pattern
8.
exit
DETAILED STEPS
Command or Action
Purpose
Step 1
call-manager-fallback
Example:
Router(config)# call-manager-fallback
Enters call-manager-fallback configuration mode.
Step 2
secondary-dialtone
digit-string
Example:
Router(config-cm-fallback)# secondary-dialtone 9
Activates a secondary dial tone when a digit string is
dialed.
Step 3
transfer-system
{
blind
|
full-blind
|
full-consult
|
local-consult
}
Example:
Router(config-cm-fallback)# transfer-system
full-consult
Defines the call-transfer method for all lines served by
the Cisco Unified SRST Router.
•
blind
: Calls are transferred without consultation
with a single phone line using the Cisco proprietary
method.
•
full-blind
: Calls are transferred without
consultation using H.450.2 standard methods.
•
full-consult
: Calls are transferred with consultation
using a second phone line if available. The calls
fallback to
full-blind
if the second line is
unavailable.
•
local-consult
: Calls are transferred with local
consultation using a second phone line if available.
The calls fallback to
blind
for nonlocal consultation
or nonlocal transfer target.