NEC UNIVERGE SV9100 Manual page 75

Available Codecs for SIP MLT handsets
· G.711 64Kbps codec MOS 4.4
· G.722 64Kbps codec MOS 4.4
· G.729 8Kbps codec MOS 4.0
The bandwidth values quoted for these codecs are for the digitized speed in one direction only. The actual
bandwidth required for a call will depend on many other factors and will be much higher than these figures.
The above MOS values are quoted for ideal network conditions. The value could be lower depending upon
the network performance.
The codec is programmed against a Type (profile). Up to five Types (profiles) can be set up. The extension
is then assigned to particular Type (profile).
1) Program the codec for each Type using the Audio Capability Priority option in Easy Edit –
Advanced Items/VoIP/Extensions/DT800 DT700 Setup/DT800 DT700 Codec (PRG84-24-28)
2) Assign the Type number to the extension using the Codec Type option in Easy Edit –
Items/VoIP/Extensions/DT800 DT700 Setup/DT800 DT700 Terminal Settings (PRG15-05-15)
Please be aware that this codec selection is only a preferred setting. It is possible that a SIP MLT will use
one of the other available codecs depending on the destination of the conversation and also who was the
originating party of the call.
RTP Alarm
RTP Alarm is an audible indication to a user that the RTP (speech) is not getting through to that user. It can
be heard when using SIP MLT Extensions when there are problems on the network between the end
points.
The alarm is indicated as several short beeps in the ear piece of the receiving user, the beeps may be
repeated if the problem continues.
The RTP Alarm can be enabled/disabled on a per handset basis using the handset Menu: -
Menu
5. Setting
1. User Setting
2. Talk
1. RTP Alarm
Chose the required setting for the RTP Alarm and press OK
Press the 'Exit' key to exit the handset Menu
More information regarding packet loss may be obtained by using the 'QoS' option of the SIP MLT
Maintenance Menu.
SIP MLT Maintenance Menu
There is a maintenance menu in the SIP MLT. To access it, press the "Help" button for 2 seconds.
This menu can only be accessed after the display shows "Connecting..." or the extension is operational. It
is possible to use this menu during a call.
The menu options are as follows: -
1. QoS
2. System Information
3. Ping
Part 2: VoIP Manual
Advanced
75