# Power connectors

The AG 2000 board has an external and an internal power connector. Neither the external power connector or the internal power connector are used on the loop start variant of the AG 2000 board.

## External power connector

As shown in the following illustration, the external power connector is located on the end bracket of the AG 2000 board. For more information about this external power connector, refer to Connecting power supplies.

Note: The mating power connector is Molex 43025-1000 or an equivalent.

The following table shows the voltage requirements of the different signaling modules:

AG 2000 board type | High battery | Low battery | Ring voltage
--- | --- | --- | ---
Loop start | NA | NA | NA
Subscriber loop | -48 VDC | -30 VDC | -48 VDC plus 86 VAC
DID | -48 VDC | None or -24 to -48 VDC | NA

Note: If only one voltage (-24 or -48) is used with subscriber loop, connect it to the High Batt terminal.

The AG 2000 board is rated to operate within the limits presented in the following table. This information is useful if you are not using an NMS power supply.

Input | Minimum | Maximum | Unit
--- | --- | --- | ---
High Batt | -21 | -52 | VDC
Low Batt | -21 | High Batt | VDC
Ring Voltage |  | 175 (-48 VDC plus 90 VRMS AC) | V peak (AC and DC)

## Internal chassis power connector

The internal chassis power connector enables you to attach telephone battery and ringing supply voltages within the chassis. For more information about this internal power connector, refer to Connecting power supplies. The pin assignments are shown in the following illustration: