Paradyne Comsphere 3550 Series Quick Reference Manual page 13

Table 3. Model 3551 DSU Jumper Straps
State of
Strap
Jumper
Designation
Strap
J12
J13
J20
J21
Left V.35 Test Mode Indication:
Left — Enables V.35 Test Mode Indication
(Pins 1 and 2). This is the factory default.
Right — Disables V.35 Test Mode Indication (Pins 2
and 3).
Left EIA-232-D Test Mode Indication:
Left — Enables EIA-232-D Test Mode Indication
(Pins 1 and 2). This is the factory default.
Right — Disables EIA-232-D Test Mode Indication
(Pins 2 and 3).
Left Alarm Monitoring (used with the – 48 Vdc Central Office
Power Unit):
Left — Disables the – 48 Vdc alarm monitoring
function (Pins 1 and 2). This is the factory default.
Right — Enables the – 48 Vdc alarm monitoring
function (Pins 2 and 3); the NMS adapter cable is
being used for alarm monitoring.
Right Alarm Monitoring (used with the – 48 Vdc Central Office
Power Unit):
Left — Enables control of alarm monitoring via the
NMS adapter cable (Pins 1 and 2); the NMS adapter
cable is being used for alarm monitoring.
Right — Disables control of alarm monitoring via the
NMS adapter cable (Pins 2 and 3); a standard
EIA-232 cable or the NMS adapter cable is being
used for the diagnostic channel. This is the factory
default.
Function
11