Matrix ETERNITY NE System Manual 145
• G.723
• G.729 AB
•GSM FR
• iLBC - 30 ms
• iLBC - 20 ms
• G.711 Law
• G.711 A - Law
If you do not want to select any Vocoder, you can select the option 'None'. However, if all Vocoder
Preferences from 1 to 7 are set to 'None', incoming and outgoing calls will be blocked.
• If you selected G.723 codec as a Preferred Vocoder, select G.723 Bit Rate as: Bit Rate: 5.3 Kbps or 6.3
Kbps. Default: 6.3kpbs.
When G.723 is negotiated, the selected Bit Rate will be applied only when sending the RTP packets.
When receiving RTP packets from the remote end, both Bit Rates of G.723 will be accepted.
• To suppress ‘Silence’ packets and allow only Voice packets through, select the check box Silence
Suppression. Default: Disabled.
• SARVAM UCS supports Silence Suppression for all Vocoders except GSM FR.
• Silence Suppression must be disabled, if you have selected 'Pass Through' as the "Fax Type".
• Select the Send Silence Suppression Attribute check box, if you want to include "silencesupp" media
attribute in the SDP body. If you do not want the system to include the "silencesupp" media attribute in the
SDP body, clear the checkbox. By default, it is enabled.
• Select the appropriate DTMF Option from the three DTMF types supported by SARVAM UCS: RTP (RFC
2833) or SIP Info, or InBand. Default: RTP (RFC2833).
The DTMF type determines how the DTMF digits will be sent over the IP Network, when a DTMF digit is
pressed.
• RFC2833 Payload Type: If you have selected RTP (RFC 2833) as the DTMF Type, you must configure
the value of RFC2833 Payload Type. The RTP packets will be tagged as DTMF as per the set value. The
value of RFC2833 Payload Type can be set from 96 to 127.
• Gain Settings: To avoid noise or echo during speech on SIP Extensions, you must set the speech volume
levels (Tx and Rx Gain) on the SIP Extension.
• SIP - System (Tx-Gain and Rx-Gain): Configure the Gain Settings that you want the system to apply
on the SIP Extension with respect to the system (for example Call Conference). These will not be
applicable for any other port type. Valid Range for Tx Gain: -31dB to +31dB and Rx Gain -31dB to
+31dB. Default: 0dB.
• SIP- Voice Mail (Tx-Gain and Rx-Gain): Configure the Gain Setting that you want the system to apply
on the SIP Extension when the SIP Extension user is accessing the Voice Mail System. Valid Range
for Tx Gain: -31dB to +31dB and Rx Gain -31dB to +31dB. Default: 0dB.
• SIP - Voice Module (Tx-Gain and Rx-Gain): Configure the Gain Settings that you want the system to
apply on the SIP Extension when the system plays Voice Module to the SIP Extension user. Valid
Range for Tx Gain: -31dB to +31dB and Rx Gain -31dB to +31dB. Default: 0dB.
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