Nortel Networks BCM200, 400 4.0 manual To connect the BCM system to the WAN, To connect the modem

Chapter 9 Connecting the cables 157

To connect the BCM system to the WAN

1Ensure the system is powered up before connecting this cable.

2Do one of the following:

•To connect the WAN card using the RJ-48C connector, insert the wide area network (WAN) cable into the RJ-48C jack on the WAN card (see Figure 79 on page 156).

•To connect the WAN card using the DB26 connector, use an adapter cable to connect the wide area network (WAN) cable to the DB26 connector on the WAN card. These adapter cables are available from your BCM supplier (see Figure 79 on page 156).

Table 57 shows the wire connections for a DB26 adapter cable.

Table 57 DB26 adapter cable

DB26 on
WAN card	Signal	DB26 cable
1	Chassis Ground	1
2	Transmit Data	2
3	Receive Data	3
4	Request to Send	4
5	Clear to Send	5
6	Data Set Ready	6
7	Signal Ground/	7
	Common Return
8	Data Carrier Detect	8
9		9
10		10
11		11
12		12
13		13

DB26 on
WAN card	Signal	DB26 cable
14		14
15	Transmit Clock	15
16		16
17	Receive Clock	17
18		18
19		19
20	Data Terminal Ready	20
21		21
22		22
23		23
24	External Clock	24
25		25
26

To connect the modem

1Ensure the system is powered up before connecting this cable.

2Insert a PSTN line into the line jack on the modem interface (see Figure 79 on page 156). Table 58 shows the wire connections for a RS-422/EIA 530 cable.

Table 58 RS-422/EIA 530 adapter cable (Sheet 1 of 2)

DB26 on		RS-422/EIA
WAN card	Signal	530 cable
1	Protective Ground	1
2	Transmit Data A	2

DB26 on		RS-422/EIA
WAN card	Signal	530 cable
14	Transmit Data B	14
15	Transmit Clock A	15

BCM200/400 4.0 Installation and Maintenance Guide