AudioCodes Mediant 500L MSBR User Manual

User's Manual 24. Digital PSTN
Version 6.8 363 Mediant 500L MSBR
24.2.2.1 Recovering Clock from PSTN Line Interface
This section provides a brief description for configuring synchronization based on
recovering clock from the PSTN line interface. For a full description of the clock
parameters, see ''PSTN Parameters'' on page 934.
 To configure synchronization based on clock from PSTN line:
1. In the TDM Bus Settings page, do the following:
a. Set the 'TDM Bus Clock Source' parameter (TDMBusClockSource) to Network to
recover the clock from the line interface.
b. Select the trunk from which the clock is derived, using the 'TDM Bus Local
Reference' parameter (TDMBusLocalReference).
Note: The BRI trunk should be configured as an ISDN user-side.
c. Enable automatic switchover to the next available "slave" trunk if the device
detects that the local-reference trunk is no longer capable of supplying the clock
to the system:
a. Set the 'TDM Bus PSTN Auto FallBack Clock' parameter
(TDMBusPSTNAutoClockEnable) to Enable.
b. Enable the device to switch back to a previous trunk that returns to service if
it has higher switchover priority, using the 'TDM Bus PSTN Auto Clock
Reverting' parameter (TDMBusPSTNAutoClockRevertingEnable).
c. In the Trunk Settings page, configure the priority level of the trunk for taking
over as a local-reference trunk, using the 'Auto Clock Trunk Priority'
parameter (AutoClockTrunkPriority). A value of 100 means that it never uses
the trunk as local reference.
24.2.2.2 Configuring Internal Clock as Clock Source
This section describes how to configure the device to use its internal clock source. The
internal clock source is a stratum 4E-compliant clock source. When the device has no line
interfaces, the device should be configured in this mode.
 To configure internal clock as clock source:
1. Set the clock source to be from the device's internal oscillator. In the TDM Bus
Settings page, set the 'TDM Bus Clock Source' parameter (TDMBusClockSource) to
Internal.

AudioCodes Mediant 500L MSBR Specifications

General

Brand	AudioCodes
Model	Mediant 500L MSBR
Category	Network Router
Language	English