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Note
Pin assignments for ports 3 and 4 are the same as those of ports 1 and 2.
Accessory and User-supplied ltems
Accessory: none
User-supplied: RJ11 connectors
RJ11 Connector Pin Assignments for CO line Crad
No. Signal Name
1
R2
2
R1
3
T1
4
T2
RJ11 Connector Pin Assignments for Extension Card
No. Signal Name
1
T2
2
T1
3
R1
4
R2
Installing Optional Service Cards
Function
Ring port 2
Ring port 1
Tip port 1
Tip port 2
Function
Tip port 2
Tip port 1
Ring port 1
Ring port 2
10
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