Instruction manual

Installation
58 025-9416
q
2. Connect the leads for each Model 640 trunk as shown in Figure 23, using standard 26
AWG wire-wrap wire. Wiring configuration varies by telephone line type. The figure
above shows the wiring configuration for an E&M 4-wire telco punchdown block.
Notes: Many applications do not require all six of the available phone line pins. For
example, a typical 2-wire telco interface only requires the TIP and RING leads for
each trunk. Contact the telephone service provider to determine the line types and
punchdown configuration.
It may be wise to wire up all six leads and then use bridging clips to connect only the
necessary leads. That way, any future changes in the telco line type will not require
complete rewiring of the paging terminal interface.
Table 8. E&M 4-Wire Type I TELCO / PABX Interface
RJ21X
pinout
Trunk
#
Signal
Name
Wire Color
(Body/Stripe)
RJ21X
pinout
Trunk
#
Signal
Name
Wire Color
(Body/Stripe)
1 1 RING BLU / WHI 26 1 TIP WHI / BLU
2 1 RING1 ORG / WHI 27 1 TIP1 WHI / ORG
3 1 M GRN / WHI 28 1 E WHI / GRN
4 2 RING BRN / WHI 29 2 TIP WHI / BRN
5 2 RING1 SLA / WHI 30 2 TIP1 WHI / SLA
6 2 M BLU / RED 31 2 E RED / BLU
7 3 RING ORG / RED 32 3 TIP RED / ORG
8 3 RING1 GRN / RED 33 3 TIP1 RED / GRN
9 3 M BRN / RED 34 3 E RED / BRN
10 4 RING SLA / RED 35 4 TIP RED / SLA
11 4 RING1 BLU / BLK 36 4 TIP1 BLK / BLU
12 4 M ORG / BLK 37 4 E BLK / ORG
13 5 RING GRN / BLK 38 5 TIP BLK / GRN
14 5 RING1 BRN / BLK 39 5 TIP1 BLK / BRN
15 5 M SLA / BLK 40 5 E BLK / SLA
16 6 RING BLU / YEL 41 6 TIP YEL / BLU
17 6 RING1 ORG / YEL 42 6 TIP1 YEL / ORG
18 6 M GRN / YEL 43 6 E YEL / GRN
19 7 RING BRN / YEL 44 7 TIP YEL / BRN
20 7 RING1 SLA / YEL 45 7 TIP1 YEL / SLA
21 7 M BLU / VIO 46 7 E VIO / BLU
22 8 RING ORG / VIO 47 8 TIP VIO / ORG
23 8 RING1 GRN / VIO 48 8 TIP1 VIO / GRN
24 8 M BRN / VIO 49 8 E VIO / BRN
25
CHASSIS GROUND
SLA / VIO 50 CHASSIS GROUND VIO / SLA
Notes on Table 8:
1. Colors are abbreviated as follows:
BLK = black BLU = blue BRN = brown GRN = green
ORG = orange VIO = violet SLA = slate (grey)
2. The E (ear) leads provide “to telco” supervision. The M (mouth) leads provide “from telco” supervision.