Paradyne Comsphere 3830 User Manual page 93

RS-232
Name
Pin
22 R1
23 CT111
24 XTXC
25 TEST
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:
TEK leads are for loopback purposes.
A 50-pin version is being considered for multiple line connections."
3830-A2-GB91-20
EIA-232-D Pin Assignments
EIA
Circuit
CE
CH
DA
TM
(1) 2-wire operations
(2) 4-wire operations w/o TEK leads
(3) 4-wire operations with TEK leads
Table C-1
(3 of 3)
Signal
CCITT
Source
125 DCE
111 DTE
113 DTE
142 DCE
November 1996
C. Pin Assignments
Circuit
Function
Ring Indicator
Data Rate
Selector
External Clock
Test Mode
C-3