ADTRAN 1200063L1, Manual

Page: 77 / 137

Chapter 6. Configuring Network Options
61200063L1-20 DSU III TDM User Manual 6-3
Clock Source
The C
LOCK
S
OURCE
options specify the timing source for the
DSU III TDM. The factory default setting is F
ROM
N
ETWORK
(see Figure 6-
2), which means the network receive signal is the timing source. Selecting
the
M
ASTER
option sets the DSU III TDM as the master timing source.
Figure 6-2. Setting the Clock Source
When operating on a DDS network, the timing should be
F
ROM
N
ETWORK
.
On a point-to-point private network, one DSU III TDM must be set for
M
ASTER
, the other set for
F
ROM
N
ETWORK
.
1=NETWORK OPT. 1=LOOP RATE
2=CLOCK SOURCE 1=MASTER
1=LOCAL 3=REMOTE CONFIG. 2=FROM NETWORK
3=CONFIG
2=DTE OPTIONS
2=REMOTE 3=TEST OPTIONS
4=DIAL OPTIONS
5=MANUAL COMMAND