ADC H4TU-C-319 List 1 Line Unit, HDSL4 user manual Craft Port, System Alarm Output Pin

LTPH-UM-1031-03, Issue 3 Appendix A - Specifications

System Alarm Output Pin

Pin H on the card-edge connector (see Figure 33 on page 63) is the H4TU-C-319 System Alarm output pin. The following notes apply to Pin H:

•Pin H replaces the Local Loss of Signal (LLOS) on normal high-density (3192) repeaters.

•The normally floating output of Pin H can connect to pin 1 of the 1184 or 3192-9F Alarm Card in position 29 of the High Density (HD) shelf.

•The H4TU-C forces pin H to +5Vdc (maximum of 10 mA) for a system alarm condition. Pin H then remains at +5 Vdc for the duration of the alarm condition.

•If the Wescom 1184 Alarm Card is installed in the shelf, its LOS LED lights for every minor alarm (MNRALM).

•The H4TU-C Status LED flashes red for the duration of a system alarm condition.

•Setting the ALM option to DIS only prevents the system alarm bus on Pin H from being activated for a system alarm event. The Status LED still flashes red and the ALRM message still displays.

Pin H must never be taken above +5 Vdc or below -60 Vdc.

CRAFT PORT

Figure 33 shows the pinout for the craft port connection and its connection to a DB-9 or DB-25 connector on a maintenance terminal.

H4TU-C-319

DB-9 Connector

(DCE)

2

3

5

TD (Transmit Data)

RD (Receive Data)

GND

Terminal

DB-9 Connector

(DTE)

2

3

5

Terminal

DB-25 Connector

(DTE)

3

2

7

Figure 33. RS-232 Craft Port Pinouts

H4TU-C-319 List 1 September 12, 2003 63