ADTRAN 1202011L1, Руководство пользователя

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61202011L1-1 DSU III AR User Manual 5-1
Chapter 5
Network Configuration
NETWORK OPTIONS
The
N
ETWORK
O
PTIONS
configuration parameters control the loop
operation of the DSU III AR.
Once a parameter is set, C
OMMAND
A
CCEPTED
is displayed briefly
before returning to the active menu.
Loop Rate
The Loop Rate option sets the loop operating speed. The unit
should be set to the rate required by the DDS Service. The DSU III
AR also supports subrate DTE data over a 56 kbps or 64 kbps loop.
The loop rate must be set independently of the DTE rate.
The default factory setting is
A
UTO
. When configured to
A
UTO
, the
DSU will automatically attempt to adapt to the loop rate. Since 64k
and 56k secondary channels look identical on the network, the DSU
III will adapt to 56k secondary channel for either loop rate. If the
loop rate is known, select the rate from the menu. The various loop
rates and format selections are listed in Figure 5-1 on page 5-2. The
equivalent AT commands that perform the same configuration
functions are shown in Table 5-1 on page 5-2.
Eight loop rate selections are available (shown in Figure 5-1). After
selecting any loop rate other than
A
UTO
or
64
KBPS
the option for a
secondary channel is available. The secondary channel rate is
determined by the current loop rate.