User guide

August 2001 153
Configuring the MVIP-90 Clock
If you have multiple T1 or E1 boards connected in loopback
mode:
a. Set the first T1 or E1 board to drive the MVIP clock from
the internal oscillator and drive SEC8K from the first
network trunk:
CLOCK_REF_OSC | SEC8K_DRIVEN_BY_NET1
(use the RHT_SET_CLOCK function)
b. Set all other boards to take the clock from the MVIP bus:
CLOCK_REF_MVIP | SEC8K_NOT_DRIVEN
(use the RHT_SET_CLOCK function)
Example 7 shows how to set the clock for an T1 board using
CONFIG_CLOCK. In Example 7, the T1 board sets the primary
and SEC8K clock from the first network trunk. This code could
also be used for an E1 board by changing the name of the device.