Matrix Telecom SARVAM UMG System Manual page 473

If two or more T1E1/BRI Ports are connected to the PSTN (or a Private Network) then in such case, clock will be
extracted from the first T1E1/BRI Software port.
• Click Clock Synchronization to expand and configure the following.
• In Clock Synchronization Port (Priority 1), select the desired Port — BRI, T1E1 or None — which
you want as the first priority and also select the respective Port Number.
Similarly, configure the Clock Synchronization Port (Priority 2), Clock Synchronization Port
(Priority 3) and Clock Synchronization Port (Priority 4).
• In System Clock Synchronization, select the desired frequency for the synchronization. You can
select — 8 KHz Derived, 8 KHz, 2.048 MHz or 1.54 MHz.
Select System Clock Synchronization option as 8 KHz, only for BRI Port.
Select System Clock Synchronization option as 2.048 MHz, only for T1E1 Port (E1 line).
Select System Clock Synchronization option as 1.54 MHz, only for T1E1 Port (T1 line).
Default: 2.048 MHz for all the countries excluding USA. For USA, it is 1.54 MHz.
The system will restart when the frequency is changed.
• In PLL Locking Mode, select the speed required for clock synchronization. You can select — Fast or
Slow. Default: Slow.
• In PLL TIE Control, you can select — Enable or Disable — as per your requirement. Default: Disabled.
• In PLL Operating Mode, you can select — Normal, Hold Over or Free Run — as the operating mode
as per your requirement. Default: Normal
• In Clock Synchronization Status, the synchronization status of the clock is displayed.
467 Matrix SARVAM UMG System Manual