User guide

3-4 DL3800 DS1 Inverse Multiplexer User Guide—February 1999
3
Connect the -48 V wire to the screw terminal labeled Ñ. Attach the
ReturnÊ(+) wire to the screw terminal to the immediate right, labeled +.
Connect earth ground to the ground stud.
The DL3800 is designed to operate with a negative power supply. This
means the positive terminal is connected to the ground.
T1 NETWORK CONNECTION
Eight socket DA-15 connectors are located on the DL3800 back panel for
connecting to the T1 networks.
WECO 728A or equivalent cable is used to connect the DL3800 to each T1
channel, using the appropriate cable and connectors, which are available
from Digital Link.
DTE CABLE AND CONNECTION
DTE interface connectors are provided on the back of the DL3800, a 50-pin
SCSI socket receptacle for HSSI compatible DTE, and a DB-25 socket
connector for V.35 or RS-449 compatible DTEs.
If using a HSSI interface, the cable connecting the DL3800 to the DTE
consists of 25 twisted pairs with an overall foil/braid shield. The DL3800
end of the cable should have a plug connector. One 50-pin SCSI socket
receptacle is provided on the rear of the DL3800 to connect the DL3800 to
HSSI-based networks/systems. Cables and connectors are available from
Digital Link. Using the appropriate cable and connectors, connect the
DL3800 HSSI connector to the HSSI DTE.
If using a V.35 interface, use a shielded cable supplied by Digital Link to
connect the DL3800 to the DTE. One DB-25 socket connector is provided on
the back of the DL3800 to connect the DL3800 to the V.35/RS-449
compatible DTE. Using the appropriate cable and connectors, connect the
V.35/RS-449 DTE device to the DL3800.
WARNING: Do not operate the DL3800 without an earth ground
connection to the ground stud.
WARNING: Damage to the DL3800 may result if power is connected
improperly.