Figure 254: Dahdi Settings - Grandstream Networks UCM6200 Series User Manual

DAHDI Settings
When users encounter issues such as audio delay in outbound calls using the analog trunk, they can adjust
DAHDI settings on the UCM to attempt to lessen or resolve the issues.
For the value of the option such as "32, half":
The number in the option indicates the number of read/write buffers for TDM (DAHDI).
The "Half", "Immediate" or "Full" option indicates the strategy when reading/writing data from buffer.
"Half": Data will be read/written from buffer when half of the buffer is occupied with data.
-
"Immediate": Read/write from buffer whenever there is data occupying the buffer.
-
"Full": Data will be read/written from buffer when buffer is fully occupied with data.
-
DTMF Start Threshold: Indicates the minimum number of times a single DTMF must be detected in a signal
before it is considered valid.
DTMF End Threshold: Indicates the minimum number of times an end signal for a single DTMF number must
be detected before it is considered valid.
Normally, DAHDI settings should be kept default and should be adjusted only when users encounter analog
trunk/Fax-related issues.

Figure 254: DAHDI Settings

UCM6200 Series User Manual
Version 1.0.20.38
P a g e | 372