Action Url Settings Page - VTech ET685 Administrator And Provisioning Manual

Setting
SRTP Auth-tag
RTP/SAVP
Media Transport Offer
Media Transport Offer
Setup

Action URL Settings page

On the Action URL Settings page, you can configure Action URLs, which are basically
HTTP GET requests that are issued when a specific event occurs on the phone.
Web User Interface (WebUI) Reference
ET685 Administrator and Provisioning Manual
Description
When the setting is set to AES-32 (default), the phone offers
a 32-bit auth-tag for SRTP. Selecting AES-80 makes the
phone offer an 80-bit auth-tag.
This setting is effective only when RTP encryption (SRTP) is
also enabled and is used to specify whether the use of the
RTP/SAVP profile by the phone should be off (for backward
compatibility), optional or mandatory. When this setting is
set to mandatory the phone will offer and accept only SDPs
that contain m= lines with an audio profile of RTP/SAVP.
When this setting is set to optional, the phone will offer
SDPs containing two m= lines, one with an audio profile of
RTP/SAVP the other with an audio profile of RTP/AVP and
it will accept SDPs containing m= lines with either profile.
The RTP/SAVP profile, being the preferred one, is listed
first. Since some SIP proxies cannot handle RTP/SAVP
profiles or multiple m= lines this setting may also be turned
off. In this case the phone will send SDPs containing
RTP/AVP audio profiles only. Whether or not the crypto
attribute is included depends on whether RTP encryption is
on or off. Note: When RTP encryption is turned off this
setting has no effect.</p>
Select the type of the rtp media transport. In mostly every
case you should be fine with the default udp. However, RTP
via TCP is also available according to RFC4145. If you
choose tcp please pay also attention to
user_media_setup_offer.
The chosen value has only affect if
user_media_transport_offer has been set to TCP. It defines
according to RFC4145 the local role on an SDP offer.
active: local party is connecting to remote party

(a=setup: active)
passive: remote party is connecting to local party

(a=setup: passive)
any: remote party shall decide who is connecting

(a=setup: actpass)
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