Matrix ETERNITY NE - T.38 Parameters

230 Matrix ETERNITY NE System Manual
2. Set the Optimization Factor (only if you selected Dynamic Jitter Buffer) to the desired value from 01 to 13.
Default: 10.
In networks with higher jitter, a higher value should be configured as Optimization Factor.
The actual size of the Dynamic Jitter Buffer will be determined by the DSP on the basis of the Optimization
Factor configured and actual network condition. Dynamic Jitter buffer can go up to maximum 300
milliseconds.
3. Set the Minimum Delay (msec) (for both Static and Dynamic Jitter Buffer) to the desired value from 10 to
280 milliseconds. Default: 10.
The Minimum Delay determines the size of the Static Jitter Buffer. When Jitter Buffer type is selected as
Static, the Minimum Delay defines the size of the Static Jitter Buffer. The Static Jitter Buffer will store each
received voice packet for the configured time and then it will send it to DSP for voice processing.
When Jitter Buffer type is Dynamic, the Minimum Delay specifies the minimum time for which the Dynamic
Jitter Buffer will store the received voice packet before sending it to the DSP for voice processing.
4. You can send/receive Fax over IP (FoIP) from a Fax machine connected to the SLT port of the ETERNITY
NE.
• Select as Fax Type, the protocol of Fax over IP.
The ETERNITY NE supports the fax options: T.38 ( UDPT L ) , T.38 (RTP), and Pass Through.
• 'Pass Through' and 'T.38' will work only if the peer devices also support the same option.
• If you select 'Pass through' as Fax type, you must disable 'Silence Suppression'.
• If the fax sent using T.38 is rejected, ETERNITY will use Pass Through for sending the Fax.
T.38 Parameters
If you selected T.38 protocol as Fax Type, you may configure Eye Quality Monitor (EQM) related parameters to
improve quality of Fax. The higher the EQM, the better the Fax quality. To improve the quality of T.38 fax reception,
1. Set the Max Rate (Kbps) to the desired speed. Default: 14.4 kbps.
The Max Rate controls the Fax image transfer speed. As EQM is inversely proportional to fax Max Rate, if
you receive poor quality fax, the Max Rate should be reduced.
2. Set the Packet Period (msec) to the desired value. Default: 40msec.
The packet period sets the sampling rate of TDM signal. If you cannot improve fax quality by lowering Fax
Max Rate, you may reduce the Fax Packet Period.