Cisco 521SG - Unified IP Phone VoIP Administration Manual page 259

Cisco SPA IP Phone Field Reference
Regional Tab
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide
Parameter
Referral Services
Codes
Description
These codes tell the SPA9000 what to do when the
user places the current call on hold and is listening to
the second dial tone.
One or more *code can be configured into this
parameter, such as *98, or *97|*98|*123, etc. Max total
length is 79 chars. This parameter applies when the
user places the current call on hold (by Hook Flash)
and is listening to second dial tone. Each *code (and
the following valid target number according to current
dial plan) entered on the second dial-tone triggers the
SPA9000 to perform a blind transfer to a target number
that is prepended by the service *code.
For example, after the user dials *98, the SPA9000
plays a special dial tone called the Prompt Tone while
waiting for the user the enter a target number (which is
checked according to dial plan as in normal dialing).
When a complete number is entered, the SPA9000
sends a blind REFER to the holding party with the
Refer-To target equals to *98<target_number>. This
feature allows the Cisco SPA9000 to hand off a call to
an application server to perform further processing,
such as call park.
The *codes should not conflict with any of the other
vertical service codes internally processed by the
Cisco SPA9000. You can empty the corresponding
*code that you do not want to Cisco SPA9000 to
process.
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