IP Series Installation Manual Hardware overview/installation
B.13
Port cards
The IP Series port cards all use industry-standard RJ-11-type 6-pin or RJ-48-type 8-pin modular
jacks for connection to CO lines, analog devices, T1 spans or ISDN/PRI. Analog device port cards
and CO line port cards use standard RJ-11 pin-outs as shown:
303 CO-and-analog port card
The 303 Card supports up to three CO loop-start lines and three analog
devices. The advanced CO line circuitry provides open loop detection and
Caller ID. Loop-start lines are connected to the 303 Card and the 600 Card
through an RJ-11 connector.
The lower RJ-11 is used for loop-start CO lines and the upper RJ-11 is for
analog devices. CO line 1 connects to pins 3 (tip) and 4 (ring); CO line 2 uses
pins 2 and 5; and CO line 3 uses pins 1 and 6.
The upper RJ-11 connects to analog devices such as modems, fax machines
and cordless phones. The RJ-11 pin pairs for the analog ports are: 3 and 4 for
the first port; 2 and 5 for the second port; and 1 and 6 for the third.
600 CO line port card
The 600 Card supports up to six loop-start CO lines on two RJ-11 connectors.
The CO line circuitry provides open loop detection and Caller ID.
The lower RJ-11 connects CO lines to ports 1 through 3 on the following pin
pairs, respectively: 3 and 4; 2 and 5; and 1 and 6.
The upper RJ-11 connects CO lines to ports 4 through 6 on the following pin
pairs, respectively: 3 and 4; 2 and 5; and 1 and 6.
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