AT&T 3551 Switch User Manual


 
Installing the Model 3550 DSU
2-33550-A2-GB20-10 February 1995
Figure 2-1. Model 3550 Hardware Switch Location (shown without a TDM/Flex)
Table 2-1
Model 3550 DSU Switch Settings
Switch Position Switch Setting Function
S1-1
ON
(default)
Permissive V.32 DBM transmit output level of –9 dBm
S1 1
Off Programmable V.32 DBM transmit level between –12 dBm and 0 dBm
S1 2
ON Frame ground (FG) connected to signal ground (SG)
S1-2
Off
(default)
FG connected to SG through 100 ohm resistor
ON is to the rear as you face the front of the DSU.
Off is to the front.