NEC UNIVERGE SV9100 Manual page 117

Extensions/SIP Terminal Settings
To enable SIP Video on a per extension basis, use the 'Video Mode' option in Easy Edit–
VoIP/Extensions/SIP Extensions/SIP Terminal Settings
Conditions/Comments
The video stream cannot pass through the GPZ-IPLE card, SIP Peer to Peer must be enabled.
SIP CTI must be disabled.
Video communication between a Standard SIP terminal and the UC Client Softphone is not
possible.
The SIP terminal must pass interoperability testing by NEC before it can be supported.
The video codec is not supported by the GPZ-IPLE card. The video codec information from the
received SDP message will be forwarded to the destination terminal.
The communicating video terminals must support common audio and video codecs.
SIP Video is not supported across AspireNet or K-CCIS as the communication between the SIP
terminals is not Peer to Peer.
Be aware of bandwidth requirements of video communication, this will be considerably higher
than a voice call. Bandwidth is dependent on codec selection, frame rate and resolution. Check
the manufacturer's data sheet for the relevant terminal for further details.
SIP INFO DTMF Support
This feature enables the SV9100 receive DTMF information in SIP INFO messages sent by
standard SIP terminals so that the PBX can get the dial information before a RTP session
between the GPZ-IPLE and the terminal is established. This allows the standard SIP terminals
to initiate features during the ringing state such as CAMP ON and Message Waiting.
SIP INFO messages can be sent Out-of-band which allows SIP terminals to send the DTMF information
without an active RTP session.
SIP INFO is described under RFC2976. There are two INFO formats which the main software will
understand as DTMF information. Format 1 is the most widely used option and Format 2 is less-common
but will be accepted to ensure maximum possible interoperability.
Format 1 is DTMF relay method and the body of the SIP message consists of signaling information and
uses the content-type 'application/dtmf-relay'.
Format 1: Digit 5 with a duration of 160 msec
Part 2: VoIP Manual
Advanced Items/
117