Black Box 3600 User Manual page 27

Introduction
The Modem 3600 rear panel has an EIA-232 DTE connector, an 8-pin
TELSET/LEASED LINE jack, an 8-pin DIAL jack, the power switch,
fuse, and cord (Figure 1-2).
TELSET
LEASED LINE
DIAL
Figure 1-2. Rear Panel (115 Vac Model)
Modem 3600 1-5