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DTMF Relay Volume: The DTMF relay volume
T.38 Fax Volume: The T.38 fax relay volume
T.38 Redundant Depth: The T.38 redundant packet depth. It could 0
(no redundant), 1 or 2. It is recommended to set to 2.
T.38 ECM: The t.38 error correction mode. Default value is ON.
Min Jitter Buffer (msec): The minimum delay time of Jitter buffer.
Max Jitter Buffer (msec): The Maximum delay time of Jitter buffer.
Max Echo Tail Length (G.168): Enable the echo cancellation feature.
The default setting is “128ms”.
Jitter Opt. Factor: Jitter buffer dynamic factor for optimize. Please
set to 7 unless under Welltech’s instruction to change.
Impedance: selected analog phone’s impedance.
(for FXS port use)