Nortel Networks DCT1900 manual JP5

Technical Product Manual - DCT1900

Installation Instructions, Digital Line Unit (DLU) - REX-BRD0023

CHAPTER 15

Digital Line Unit (DLU) - REX-BRD0023

AWS1024 Meridian, AWS1025 Norstar, AWS1026 Lucent

15.1General

There are 12 transformer-isolated digital front ends (ports) on the board that provide 12 individual digital lines. These digital lines can support up to 12 Portable Telephones.

Maintenance

Upgrades and re-programming of the DLU board’s flash memory are done via the RS232 serial cable and the serial port on the face of the DLU board (COM 1). The board does not need to be removed from the system during reprogramming but all twelve ports will be out of service during this process. The RJ-45 connectors should be disconnected from the DLU board before downloading software.

The boards may be inserted into or removed from a live system. Other boards already in the system however, may reset during live insertion.

The DLU will come pre-programed with software specific to each PBX. The DLU board will have a specific part number for each PBX it is to integrate with.

The DLU is programable to accommodate the need for software enhancements and fixes.

Note:

Boards should be inserted /removed one at a time. All connections to the RJ45 connectors and the DB9 connector should be removed prior to live insertion or removal.

15.2Board Description

Jumpers

Not applicable

Cables

The DLU interfaces via cable set AWS1019. Each cable serves 2 boards.

Connectors
COM 1		: The RS232 serial port is for field service.
JP6 (ports 1 - 6)		: The RJ45 connectors on the front end are for twisted pair
		connections to the PBX. There are 12 connectors, one for each
JP7 (ports 7 - 12)		DLC. (The Tip/Ring connections appear on pair 1 (pins 4 and 5)
		of the RJ45 connector).
JP5		: Backplane connector, female DIN96 R type.
LEDs
LED1	Green	: Normally on. Power On LED
LED2	Red	: Normally off. Watch–dog LED
LED3	Red	: Normally off. Board not polled LED
LED4	Red	: Normally off. Board Error LED.

Install-DCT1900/R8/mw	15-1
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