Patton electronic 4950-NCE Connecting a T1 PRI port to an NT device, T1 PRI crossover cable

SmartNode 4950-NCE Getting Started Guide C • Cabling

T1 PRI

The T1 PRI is usually connected to a PBX or switch—local exchange (LE). Type and pin outs of these devices vary depending on the manufacturer. In most cases, a straight-through RJ-45 to RJ-45 can be used to connect the PRI with a PBX. A cross-over cable is required to connect to an NT device, as illustrated in figure 14 on page 57.

WARNING

WARNING

Hazardous network voltages are present in the PRI cables. If you detach the cable, detach the end away from the SmartNode or interface card first to avoid possible electric shock. Network hazardous voltages may be present on the device in the area of the PRI port, regardless of when power is turned OFF.

To prevent damage to the system, make certain you connect the PRI cable to the PRI port only and not to any other RJ-45 socket.

0/3

0/2

	0/1
T1/E1	0/0

ETH 0/1

ETH 0/0

Reset	Console
	RS-
	232

NT

Cross-over cable

Figure 14. Connecting a T1 PRI port to an NT device

RJ-45, male			RJ-45, male
RX Ring	1	1	RX Ring
RX Tip	2	2	RX Tip
RX Shield	3	3	RX Shield
TX Ring	4	4	TX Ring
TX Tip	5	5	TX Tip
TX Shield	6	6	TX Shield
N/C	7	7	N/C
N/C	8	8	N/C
		*N/C = No connection*

Figure 15. T1 PRI crossover cable

T1 PRI 57