Operation Manual

Cisco SPA IP Phone Field Reference

SIP Tab

Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 234

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 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.

NOTE Not applicable to Cisco WIP310.

Keep Referee When REFER

Failed

Set this parameters to yes to configure the phone

to immediately handle NOTIFY sipfrag messages.

You can also configure this parameter in the

configuration file:

<Keep_Referee_When_REFER_Failed ua="na">Yes

</Keep_Referee_When_REFER_Failed>

Parameter Description

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