20
MULTIPORT CSU/DSU
Switch S3-2: Response to RDL Request
Use Switch S3-2 to allow the CSU/DSU to enter the Remote Digital Loopback
diagnostic test when requested to do so by the remote CSU/DSU. For example,
when Switch S1-8 is set to “On,” it will enter RDL mode (see
Section 5.3.2
) when
requested to do so by the remote CSU/DSU.
Table 3-15. Settings for Switch S3-2.
S3-2
Setting
Off
Response to RDL Request Enabled
On
Response to RDL Request Disabled
Switch S3-3: Front-Panel Switch Enable/Disable
Use Switch S3-3 to enable or disable the front-panel switches.
Table 3-16. Settings for Switch S3-3.
S3-3
Activation
Description
Off
Enabled
Front-panel switches may be used to
activate/terminate diagnostics
On
Disabled
Front-panel switches will have no effect on the
operation of the unit
Switch S3-4: DTE Loop Request Line Enable/Disable
Use Switch S3-4 to activate or deactivate DTE control of the loopback diagnostic
modes and BER test patterns.
Table 3-17. Settings for Switch S3-4.
S3-4
Activation
Description
Off
Enabled
DTE loop-request lines may be used to
activate/terminate diagnostics
On
Disabled
DTE loop-request lines will have no effect on the
operation of the unit
