Configuring SIP, SPCP, and NAT
Configuring SIP
Cisco SPA 500 Series and WIP310 IP Phone Administration Guide
86
4
CTI Enable
If set to yes, enables the computer telephony integration (CTI),
where a computer can act as a call center handling all sorts of
incoming and outgoing communications., including phone calls,
faxes, and text messages. The CTI interface allows a third-party
application to control and monitor the state of a Cisco IP phone
and, for example, initiate or answer a call by clicking a mouse on a
PC,
NOTE
CTI must be enabled on the Cisco SPA 500 Series IP
Phone for an attached Cisco SPA 500S to properly monitor the
Cisco SPA 500 Series IP phone's line status. If setting up a Cisco
SPA 500S, see
Chapter 9, “Configuring the Cisco SPA 500S
Attendant Console.”
Defaults to no.
Caller ID Header
Select where the IP phone gets its caller ID from:
PAID-RPID-FROM
P-ASSERTED-IDENTITY
REMOTE-PARTY-ID
FROM header
Defaults to PAID-RPID-FROM.
NOTE
Not applicable to the WIP310.
SRTP Method
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.
Hold Target Before
REFER
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.
Parameter
Description
