Linksys BUSINESS SPA922 - Manual (Page 77)

Linksys SPA9x2 Phone Administration Guide 70
Vertical Service Activation Codes (Star Codes)
Setting Regional Parameters
Vertical Service Activation Code Notes
• You can change default star code values for your area or region.
• Call Back: Similar to the call back service offered by the PSTN, the caller can activate this
service on a busy number to recieve a call back as soon as the busy number becomes
available. The SPA9x2 phone repeatedly dials the busy number until the called party rings
or answers. Call back is also referred to as repeat dialing and works as follows:
a. The caller selects a line key and enters *66 (call back activation code).
b. The phone uses this call appearance to call the last called number. The retry period and
expiration time are configurable.
c. While the call back service is active, the corresponding line key flashes green. The line
can still be used: the call back service will pause temporarily until the call appearance is
idle again. To cancel the service, the caller can pick up any line and enter *86.
d. When the call back number rings or answers, the call appearance rings like a normal
incoming call. If the call back party answers the call before the caller does, the phone
sends a holding tone to the call back party. If the caller picks up the call back first, the
phone rings like a regular outbound call.
• Secure All Calls: Activates sRTP in all extensions. Note that you must install a set of
certificates to get sRTP in both secure ends.
• Media Loopback: An SP can set up a test call from an IP media loopback server (the source)
to a subscriber’s VoIP device (the mirror). The test call provides statistical reporting on
network performance and audio quality.
Depending on the source’s capabilities, the SP can see packet jitter, loss, and delay
(although Media Loopback cannot identify an offending hop). This helps the SP identify an