User manual

Setting Up the Campus-RS System
Campus-RS Fractional Interface Card User Manual 3-5
SET THE PRIMARY TIMING SOURCE
The primary timing source determines the timing for the entire HDSL system.
Timing can come from one of three parts of the Campus system:
• Data Port receives timing through the host equipment connected to the
data port.
• Internal receives timing from the internal oscillator of the Campus unit
(default setting).
• HDSL receives timing over the HDSL line.
Either the local or remote unit must have the timing source set to HDSL. The
other unit must be set to Data Port or Internal, depending on the system setup.
See “Timing Source” on page 8-1 for examples of timing configurations.
To set the Primary Timing Source:
1 Press Escape until CAMPUS RS I/F: FRAC displays.
2 Press Next until DATA PORT CONFIG & STATUS displays, then
press Enter. RATE MULTIPLIER displays.
3 Press Next until TIMING SOURCE displays, then press Enter. The
current timing source setting displays.
4 Press Next until the desired setting displays, then press Enter.
TIMING SOURCE and the new setting display.
5 If you set the Timing Source option to Internal or HDSL, continue with
the “Set the Transmit Clock” section. If the Timing Source is set to Data
Port, no further configuration is necessary.