Paradyne 3821PLUS manual JM8 to RJ11 Crossover Cable

COMSPHERE 3821Plus Modem

JM8 to RJ11 Crossover Cable

For 2-wire leased-line connections to a JM8 network interface, an 8-position to 6-position crossover cable (see Figure E-1) must be used according to the following FCC requirements:

``The RJ series of jacks should not be used for connecting data equipment to nonswitched private line networks ± specifically, the service equivalents of the pre-divestiture Series 3002 (Category II, Tariff #260) service. There is a substantial difference in transmit levels permitted in the private line service and those permitted in the public switched network. The industry standard is now an 8-pin keyed modular jack known as the USOC JM8

(Bellcore Technical Reference: TR-EOP-000242, Issue 1, released May 1985.) When ordering the installation of the USOC JM8, specify the appropriate wiring options:

1.2-wire operations

2.4-wire operations w/o TEK leads

3.4-wire operations with TEK leads

TEK leads are for loopback purposes.

A 50-pin version is being considered for multiple line connections.º

A JM8 to RJ11 crossover cable may be ordered. See Appendix G, Equipment List.

Figure E-1. Wiring Diagram Ð 8-Position to 6-Position Crossover Cable

E-2 January 1999 3821-A2-GB20-40