14
IDSL LINE DRIVER W/V.35 OR X.21
3.2 Configuring DIP-Switch S2
Use the eight DIP switches in Switch S2 to enable 19.2 kbps synchronous
operation, set the loopback modes, and set the speed of the control port. The
following table summarizes default positions of DIP-switch S2. Detailed
descriptions of each switch follow the table.
Table 3-8. S2 summary.
Position
Function
Factory Default
S2-1
19.2 kbps enable
On
S2-2
Front-panel switch
Off
S2-3
Response to LAL from DTE
Off
Disabled
S2-4
Not assigned
Off
S2-5
Not assigned
Off
S2-6
Response to RDL from DTE
On
Enabled
S2-7
Compatibility mode
Off
S2-8
Not assigned
Off
3.2.1 S
WITCHES
S2-1: 19.2
KBPS
S
YNCHRONOUS
R
ATE
E
NABLE
Use Switch S2-1 to allow the IDSL Line Driver to operate at the 19.2 kbps
synchronous data rate.
Table 3-9. Sync rate enable.
S2-1
Activation
Description
Off
Disabled
Synchronous data rate is 32 to
128 kbps as defined by switches S1-1
and S1-2
On
Enabled
IDSL Line Driver operates at
synchronous 19.2 kbps data rate*
*NOTE
To operate at 19.2 kbps, Set Switches S1-1 and S1-2 to the OFF position
(see Section 3.1.1).
