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COMSPHERE 3800 Series Modems
E-2 September 1998 3810-A2-GB30-30
Table E-1
VF Connector Pin Assignments: Models 3810 and 3820
Pin
3810 Phone/Leased
Connector (J6)
3810 Dial Connector
(J7)
3820 Phone
Connector
3820 Dial/Leased Connector
1 4-Wire Transmit
Leased Line/
2-Wire Leased Line
2 4-Wire Transmit
Leased Line/
2-Wire Leased Line
3
4 Phone-Ring Dial-Ring Phone-Ring 2-Wire Leased Line/Dial-Ring
5 Phone-Tip Dial-Tip Phone-Tip 2-Wire Leased Line/Dial-Tip
6
7 4-Wire Receive Leased Line
8 4-Wire Receive Leased Line
Table E-2
VF Connector Pin Assignments: TELCO Jacks
Pin
RJ11 RJ41S RJ45S JM8
6-Pin Center
Pair Leased
1 Not Used Ring (Fixed Loss Loop) Not Used Ring 1 Not Used
2 Not Used Tip (Fixed Loss Loop) Not Used Tip 1 Not Used
3 Not Used Mode Indication Mode Indication Loopback Indication Tip 1
4 Ring Ring (Programmed) Ring (Programmed) Not Used Ring
5 Tip Tip (Programmed) Tip (Programmed) Not Used Tip
6 Not Used Mode Indication Common Mode Indication Common Loopback Indication Ring 1
7 Not Used Program Resistor Program Resistor Tip Not Used
8 Not Used Program Resistor Common Program Resistor Common Ring Not Used