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E-13810-A2-GB30-30 September 1998
Pin Assignments
Overview E-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VF Connector Pin Assignments E-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EIA-232-D Pin Assignment E-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EIA RS-366-A Pin Assignments E-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overview
This appendix lists the pin assignments for VF Telco,
EIA-232-D, and EIA RS-366-A interfaces.
VF Connector Pin
Assignments
Tables E-1 and E-2 list the connector pin assignments
for Model 3810 and Model 3820 modular jacks and the
pin assignments for the Telco jacks. 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.”
Insert the 6-position plug into the LEASED jack of
your modem. Insert the 8-position plug into the
leased-line network interface.
Figure E-1. Wiring Diagram – 8-Position to 6-Position Crossover Cable
E