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RJ45 pin 1 2 3 4 5 6 7 8<br />

NETW outputs RX+ RX- TX+ TX-<br />

PBX outputs TX+ TX- RX+ RX-<br />

NETW: connection to public network DLT.<br />

PBX: network operation (QSIG).<br />

2.2.4.3.2 Alarm LEDs<br />

T2 Name T1 Name Feature<br />

BUSY BUSY B-channels busy (red LED lights up if at least 1 B-channel is busy)<br />

RAI (ATD) RAI Remote frame alarm (red LED lights up on alarm)<br />

AIS (SIA2M) AIS Too many "1's in the 2-Mbit binary train (red LED lights up on alarm)<br />

NOS (MS) NSIG Absence of 2-Mbit signal (red LED lights up on alarm)<br />

CRC (TE) CRC CRC error (red LED lights up on alarm)<br />

LOS (PVT) NSYN Loss of frame alignment (red LED lights up on alarm)<br />

2.2.5 ATA<br />

In brackets: French abbreviations<br />

2.2.5.1 Hardware description<br />

The ATA (Analog Trunk Access) board serves to connect analog trunk lines (TL). Two board<br />

versions are available:<br />

- ATA-2: 2 trunk lines<br />

- ATA-4: 4 trunk lines<br />

2-21

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