AudioCodes Mediant 500L MSBR

User's Manual 362 Document #: LTRT-10466
Mediant 500L MSBR
24.2 TDM and Timing
This section describes the configuration of the TDM and clock timing parameters.
24.2.1 Configuring TDM Bus Settings
The TDM page allows you to configure the device's Time-Division Multiplexing (TDM) bus
settings. For a description of these parameters, see ''PSTN Parameters'' on page 934.
 To configure the TDM Bus settings:
1. Open the TDM page (Configuration tab > VoIP menu > TDM > TDM Bus Settings).
Figure 24-2: TDM Bus Settings Page
2. Configure the parameters as required.
3. Click Submit.
4. Save the changes to flash memory, see ''Saving Configuration'' on page 606.
24.2.2 Clock Settings
In a traditional TDM service network such as PSTN, both ends of the TDM connection must
be synchronized. If synchronization is not achieved, voice frames are either dropped (to
prevent a buffer overflow condition) or inserted (to prevent an underflow condition). In both
cases, connection quality and reliability is affected.

PSTN line clock (see ''Recovering Clock from PSTN Line'' on page 363)

Internal clock (see ''Configuring Internal Clock as Clock Source'' on page 363)
Note: When the device is used in a ‘non-span’ configuration, the internal device clock
must be used (as explained above).