Cisco SPA303 Administration Manual page 106

Configuring SIP, SPCP, and NAT
Configuring SIP
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide
Parameter Description
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
SPA500 Series IP Phones for an attached Cisco SPA500S to
properly monitor the IP phone's line status. If setting up a Cisco
SPA500S, see
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
SRTP Method Selects the method to use for SRTP. Two choices are available:
•
•
The default value is "x-sipura."
NOTE
Hold Target Before Controls whether to hold call leg with transfer target before
REFER 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
CTI must be enabled on the Cisco SPA300 Series or Cisco
Chapter 9, "Configuring the Cisco SPA500S
Not applicable to the WIP310.
x-sipura—legacy SRPT method
s-descriptor—new method compliant with RFC-3711 and
RFC-4568
Not applicable to WIP310.
Not applicable to WIP310.
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