Cisco SPA 525G2 Administration Manual page 233

Cisco SPA IP Phone Field Reference
SIP Tab
Cisco Small Business SPA 300 Series, SPA 500 Series, and WIP310 IP Phone Administration Guide
Parameter
Mark All AVT packets
SIP TCP Port Min
SIP TCP Port Max
CTI Enable
Caller ID Header
SRTP Method
Hold Target Before REFER
Description
If set to yes, all audio video transport (AVT) tone
packets (encoded for redundancy) have the marker bit
set. If set to no, only the first packet has the marker bit
set for each DTMF event.
Defaults to yes.
Specifies the lowest TCP port number that can be
used for SIP sessions. Defaults to 5060.
Specifies the highest TCP port number that can be
used for SIP sessions. Defaults to 5080.
The CTI interface allows a third-party application to
control and monitor the state of a phone that has
registered with the Cisco SPA 9000. With this interface,
an application can control a phone to initiate an
outgoing call or answer an incoming call with a mouse
click from a PC.
Provides the option to take the caller ID from PAID-
RPID-FROM, P-ASSERTEDIDENTITY, REMOTE-PARTY-
ID, or FROM header.
Selects the method to use for SRTP. Two choices are
available:
•
x-sipura—legacy SRPT method
•
s-descriptor—new method compliant with RFC-
3711 and RFC-4568
The default value is "x-sipura."
NOTE Not applicable to WIP310.
Controls whether to hold call leg with transfer target
before sending REFER to the transferee when initiating
a fully-attended call transfer (where the transfer target
has answered). Default value is "no," where the call leg
is not held.
NOTE Not applicable to WIP310.
B
221