Operation Manual

COMfortel 1400IP/2600IP/3600IP - Firmware V2.2G - Operation and Configuration V03 07/2015 479
Settings
Providers and PBXs
Configuring the Jitter Buffer
4. Tap on DTMF signalling.
5. In the DTMF signalling list field, select one of the following options:
Configuring the Jitter Buffer
The size of the jitter buffer indicates how many RTP packets can be cached, to buffer disrup-
tions or compensate for them.
You can configure the jitter buffer as follows:
• Separately for the provider or PBX
• Using the configuration manager
• Using the telephone
Using the Configuration Manager to Configure the Jitter Buffer
1. Open the Settings > Providers & PBXs screen.
2. In the line that contains the provider/PBX, click Configure.
The provider/PBX configuration screen opens.
3. Click on the RTP tab.
4. Enter a value in the Jitter buffer entry field. Possible entries:
Outband, with local response in acc. with RFC2833: The telephone uses
different channels to transfer DTMF signals and voice data. The DTMF signals
are filtered out of the voice data. You hear a confirmation tone to confirm that
the DTMF signals have been sent successfully.
Inband, DTMF signals sent through the audio channel: The telephone uses
the same channel (DTMF tones) to transfer DTMF signals and voice data.
Outband, in acc. with RFC2833: The telephone uses different channels to
transfer DTMF signals and voice data. The DTMF signals are filtered out of the
voice data.