Zhone 3920Plus Manual de instrucciones Pagina 279

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Pin Assignments
C-53920-A2-GH30-40 October 1998
For 2-wire leased-line connections to a JM8 network interface, use an 8-position to 6-position
crossover cable (Figure C-3) 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:
2-wire operations
4-wire operations w/o TEK leads
4-wire operations with TEK leads
TEK leads are for loopback purposes.
A 50-pin version is being considered for multiple line connections.
1
2
3
4
5
6
7
8
1
2
3
4
5
6
8-POSITION
PLUG PIN NO.
6-POSITION
PLUG PIN NO.
Figure C-3. Wiring Diagram 8-Position to 6-Position Crossover Cable
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