FRONT BEZEL
SNAP
TABS
Figure 2-1. Model 3550 Hardware Switch Location (shown without a TDM/Flex)
Switch Position
Switch Setting
S1-1
S1-1
S1-2
ON is to the rear as you face the front of the DSU.
Off is to the front.
3550-A2-GB20-40
SWITCH 1
Model 3550 DSU Switch Settings
ON
Permissive V.32 DBM transmit output level of –9 dBm
(default)
Off
Programmable V.32 DBM transmit level between –12 dBm and 0 dBm
ON
Frame ground (FG) connected to signal ground (SG)
Off
FG connected to SG through 100 ohm resistor
(default)
HINGE TAB
LOCATIONS
Table 2-1
Function
July 1999
Installing the Model 3550 DSU
496-14457-01
2-3