Part 5. Connecting Pstn Circuits; Safety Precautions; Loop Start Lines; Long Line Extensions (Opx) - Samsung DCS Installation Manual

Samsung DCS
Installation

Part 5. Connecting PSTN Circuits

5.1 Safety Precautions

To limit the risk of personal injury, always follow these precautions before connecting PSTN cir-
cuits:
• Never install telephone wiring during a lightning storm.
• Never install telephone jacks in a wet location unless the jack is specifically designed for
wet locations.
• Never touch non-insulated telephone wires or terminals unless the telephone line has been
disconnected at the network interface.
• Use caution when installing or modifying telephone lines.

5.2 Loop Start Lines

Using one pair twisted 0.5mm or 0.8mm jumper wire, cross-connect each loop start C.O. line to the
analogue trunk port of your choice (Figures 5–1, 5–2 and 5-3).

5.3 Long Line Extensions (OPX)

Using one pair twisted 0.5mm or 0.8mm jumper wire, cross-connect DCS single line extensions to
Long Line or Off Premise extensions (OPX circuits) (Figure 5–4).
Circuits on the SLI card are specifically designed to meet PSTN requirements for Long Line use.
These circuits are provided with the same overvoltage and overcurrent protection as C.O. line cir-
cuits.
WARNING: Using Long Line extensions on a KDb-SLI may cause damage to the daughterboard
and/or the keyset.

5.4 Tie Lines

Using two pair twisted 0.5mm or 0.8mm jumper wire, cross-connect each RX/TX line of the tie line
to the AC15 port of your choice (Figure 5-5).
Each circuit on the AC15 provides the same overvoltage protection as tie line circuits.

5.5 Primary Rate (PRI)

Connect the PRI card to the PSTN-supplied network terminating box using the RJ-45 cable supplied.

5.6 Basic Rate (BRIN)

Using two pair twisted 0.5mm or 0.8mm jumper wire, cross-connect BRI circuits to the DCS BRIN
trunk port of your choice (Figure 5-6).
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Part 5
March 2001