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Connecting the Control Unit to the Network Interface
RJ21X Interface
The RJ21X network interface has a female 50-pin (25-pair) amphenol
connector. See Figure 4-1:
66-Type Block (RJ21-type) 25-Line Interface
26
Line 1
1
27
Line 2
2
Line Top Ring Phone Number
1 26 1 555-3827
2 27 2 555-3828
3 28 3 555-3829
● ● ● ● ● ●
● ● ● ● ● ●
25 50 25 555-3851
Line 3
28
3
29
Line 4
4
30
Line 5
5
31
Line 6
6
●
●
●
●
●
●
●
●
●
●
●
TO BE OPENED
BY AUTHORIZED
TELEPHONE CO.
PERSONNEL ONLY
50
Line 25
25
RJ21X
USOC
CUSTOMER
JACJ NO.
PROTO-TEL
BOULDER, CO.
Figure 4-1. RJ21X Network Interface Connector
To connect the RJ21X interface to the control unit, you must build a wiring
field between the RJ21X interface and the control unit. This field, in effect,
converts the female amphenol connector to 8-wire modular jacks.
Wiring
4-5