System Guide

SME VOIP SYSTEM GUIDE 4.7 34 | P a g e
Proprietary and Confidential
USE OWN
CODEC
PRIORITY
Disabled
Default disabled.
By enablbling the system codec, priority during incoming call
is used instead of the calling party priority.
E.g. If base has G722 as top codec and the calling party has
Alaw on top and G722 further down the list, the G722 will be
chosen as codec for the call.
DTMF
SIGNALLING
RFC 2833
Conversion of decimal digits (and ‘*’ and ‘#’) into sounds that
share similar characteristics with voice to easily traverse
networks designed for voice
SIP INFO: Carries application level data along SIP signaling
path (e.g.: Carries DTMF digits generated during SIP session
OR sending of DTMF tones via data packets in the same
internet layer as the Voice Stream, etc.).
RFC 2833: DTMF handling for gateways, end systems and RTP
trunks (e.g.: Sending DTMF tones via data packets in
different internet layer as the voice stream)
Both: Enables SIP INFO and RFC 2833 modes.
DTMF
PAYLOAD
TYPE
101
This feature enables the user to specify a value for the DTMF
payload type / telephone event (RFC2833).
REMOTE
CALLER ID
SOURCE
PRIORITY
FROM
SIP information field used for Caller ID source:
PAI - FROM
FROM
ALERT_INFO - PAI - FROM
CODEC
PRIORITY
G.711U
G.711A
G.726
Defines the codec priority that base stations use for audio
compression and transmission.
Possible Option(s): G.711U,G.711A, G.726, G.729, G.722.
Note: Modifications of the codec list must be followed by a
“reset codes” and “Reboot chain” on the multipage to
change and update handsets.
Note:
With G.722 as first priority the number of simultaneous calls
per base station will be reduced from 10 (8) to 4 calls.
With G.722 in the list the codec negotiation algorithm is
active causing the handset (phone) setup time to be slightly
slower than if G.722 is removed from the list.
To use G.729, add on DSP module must be installed in all
base stations. Contact your local dealer for price
information.
G729 Annex B
Enable/Disable Annex B of codec G729
Note: Both parts have to support it in order to avoid
noise and any other kind of voice interruption
USE PTIME
Enabled
Use the RTP Packet size, chosen in the below setting.
RTP PACKET
SIZE
20ms
The packet size offered as preferred RTP packet size by 8630
when RTP packet size negotiation.
Selections available: 20ms, 40ms, 60ms, 80ms
RTCP
Enabled
Enable/Disable RTCP
SEND SDP
CAPABILITIES
IN OFFER (RFC
5939)
Disabled
Enable to support RFC 5939
SECURE RTP
Disabled
With enable RTP will be encrypted (AES-128) using the key
negotiated via the SDP protocol at call setup.