Configuring SIP, SPCP, and NAT
Configuring SIP
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 122
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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,
CTI must be enabled on the Cisco SPA300 Series or
Cisco SPA500 Series IP phones for an attached
Cisco Attendant Console to properly monitor the IP phone
line status.
Defaults to no.
Caller ID Header Select from where the IP phone gets the caller ID:
PAI D -R PID - FR OM
P-ASSERTED-IDENTITY
REMOTE-PARTY-ID
FROM header
Defaults to PAID-RPID-FROM.
Not applicable to the Cisco WIP310.
SRTP Method The method to use for Secure Real-time Transport Protocol
(SRTP):
x-sipura—legacy SRPT method
s-descriptor—compliant with RFC-3711 and RFC-4568
The default value is x-sipura.
Not applicable to Cisco 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.
Not applicable to Cisco WIP310.
Parameter Description
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