Motorola T1/E1 - Manual (Page 52)

Canopy T1/E1 Multiplexer September 2004
T1/E1 Multiplexer FPGA Version 3.4
Page 52 of 73
10. Click on the radio button to indicate whether the clock source is loopback mode
or recovered mode.
NOTE: The clock source applies to all four channels.
Loopback mode loops the Tx clock back to the Rx.
Recovered mode recovers the clock from the incoming T1/E1 over Ethernet-bit-
stream (from the far end T1/E1).
11. Select Close to close the dialogue box once all channels are configured.
RESULT: You are returned to the EMS main menu.
end of procedure
2.5.6 Configure Timing
Before the timing may be configured, you need to determine the network timing scheme
to be used. You also need to identify the master and slave devices for the end-user PBX
equipment.
Procedure 22: Configuring timing using the EMS
Use this procedure to configure the timing using the EMS.
1. Select Config →T1 from the pull-down menu.
RESULT: The T1 Config dialogue box opens.
2. Click ↓ for Master Clock Reference Line.
3. Select which line is to be designated as the master clock reference line.
4. Click ↓ for Secondary Clock Reference Line.
5. Select which line is to be designated as the secondary clock reference line.
6. Click on the radio button to indicate whether the clock source for the T1 unit is
loopback mode or recovered mode.
NOTE: The clock source applies to all four T1 channels.
Loopback mode loops the T1 Tx clock back to the T1 Rx.
Recovered mode recovers the T1 clock from the incoming T1 over Ethernet
bit-stream (far end T1).
7. When all channels are configured, select Close.
RESULT: You are returned to the EMS main menu.
NOTE: If the system has been reset, clicking the Refresh button will replace the
displayed values with currently-programmed values.
end of procedure
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