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Installing
Release 3.3 163
DS1 Interface Assembly and Cabling
If you install a DS1 Formatter Card, you must also install a DS1 Interface Assembly and connect
the external cables.
The DS1 Interface Assembly provides two filtered DB-15 pin connectors for the external cables
required by one DS1 Formatter Card. You can mount up to four DS1 Interface Assemblies in
he DSU.
To install the DS1 Interface Assembly and Cables:
1. Attach the anti-static strap to your wrist.
2. Unpack the DS1 Interface Assembly. Inspect it to ensure that it is not damaged.
3. Locate the slot in the DSU that corresponds to the DSU slot that holds the DS1 Formatter
card. When you are facing the rear panel, the DSU slots, from right to left, correspond to
DSU slots 3/1/2 to 3/1/5 or on the SX-2000 they correspond to DSU slots 2 to 5.
4. Remove the cover plate from the slot on the metal box by unscrewing the two screws that
hold it in place.
5. Insert the DS1 Interface Assembly into the empty slot in the DSU box, and plug it into the
DIN connector in the back of the DSU box.
6. Align the screw holes on the DS1 Interface Assembly faceplate with the screw holes in
the metal box, and fasten the faceplate to the box.
7. Connect the 22 AWG (22 IWG) shielded twisted pair cables from the external network to
the DB-15 pin connectors on the DS1 Interface Assembly.
8. Remove the DS1 Formatter Card.
9. If the card is an E1/T1 (DS1) Formatter card, set the links for either E1 or T1 operation by
using the E1/T1 switches located on the side of the card. For E1 operation, see Connecting
to MSDN CEPT links.
10. Set the DS1 Formatter card line equalizer switches (S1 and S2).
11. Re-install the DS1 Formatter card.
12. Remove the anti-static strap from your wrist.
CEPT Interface Assembly and Cabling
If you install a CEPT Formatter card, you must also install a CEPT Interface Assembly and
connect the cables.
The CEPT Interface Assembly provides four filtered BNC connectors for the external cables
required by one CEPT Formatter card. You can mount up to four CEPT Interface Assemblies
on a SX-2000 MICRO LIGHT node or an SX-2000 DSU node. Each CEPT Interface Assembly
plugs into a J3 DIN 3 X 32 connector. These connectors are located in a 9 cm x 12.5 cm (3.5
inch x 5 inch) metal box that projects from the backplane.
To install the CEPT Interface Assembly or CEPT Interface Assembly II and Cables:
1. Attach the anti-static strap to your wrist.