Where To Place The Dsu - Paradyne 3615 Quick Reference Manual

Table 1. Model 3615 DSU Switch Settings
Switch Position Switch Setting
S1 1 S1-1
S1 2 S1-2
ON is toward the rear as you face the front of the DSU.
Off is toward the front.

Where to Place the DSU

The DSU must be placed within 6 feet of a dedicated grounded ac outlet that is
protected by a circuit breaker.
The distance between the DSU and its DTE must be within EIA-232-D/V.24 limits, or
V.35 limits if operating the DSU at speeds greater than 19.2 kbps.
For the EIA-232 connector, the typical maximum distance is 50 feet at speeds less
than or equal to 19.2 kbps. If a longer distance is needed, use high quality, low
capacitance cable and ensure that the effective shunt capacitance of the circuit
(measured at the DSU and including the capacitance of the cable and the DTE)
does not exceed 2500 picofarads, as specified in EIA-232-D.
For the V.35 connector, the maximum distance recommended between the DSU
and the DTE is nominally 1000 feet.
Allow 1 to 2 feet of clearance around the DSU for access and cable connections during
installation.
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)
3
Function