C. Pin Assignments

Table C-1

(3 of 3)

EIA-232-D Pin Assignments

RS-232

Pin

Name

EIA

Circuit

CCITT

Signal

Source

Circuit Function

22

R1

CE

125

DCE

Ring Indicator

23

CT111

CH

111

DTE

Data Rate

 

 

 

 

 

Selector

 

 

 

 

 

 

24

XTXC

DA

113

DTE

External Clock

 

 

 

 

 

 

25

TEST

TM

142

DCE

Test Mode

 

 

 

 

 

 

VF Connector Pin Assignments

For 2-wire leased-line connections to a JM8 network interface, an

8-position to 6-position conversion cable (see Figure C-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

3830-A2-GB91-30

August 1998

C-3

Page 101
Image 101
Paradyne 3830 manual VF Connector Pin Assignments