Analog-line interface card

Standard configuration

The maximum supported configuration is three analog-line interface cards with 12 ports enabled. The analog-line voice cards are installed from bottom to top beginning in slot 4 (the first three are blank) and are numbered as follows:

The first installed board is in slot 4 (fourth slot from the bottom). The board's RJ-11 jacks support ports 1 through 4, numbered from right to left, which correspond to channels 0 to 3.

The second installed board is in slot 5 (fifth slot from the bottom). The board's RJ-11 jacks support ports 5 through 8, numbered from right to left, which correspond to channels 4 to 7.

The third installed board is in slot 6 (sixth slot from the bottom). The board's RJ-11 jacks support ports 9 through 12, numbered from right to left, which correspond to channels 8 to 11.

Hardware switches

The switches that must be set on the interface cards for the Message Networking system are the ID, the hook-switch state, and the Computer Telephony (CT) Bus jumpers. These switches are preconfigured on new Message Networking systems:

The ID is a sequential number that specifies the device and channel names to use for each card. The ID is assigned using the SW30 rotary switch located at the top of the card.

The hook-switch state determines how the card responds to an incoming call when the card is not initialized. The hook-switch state is set using the SW4 switch located near the top of the card. You should always set the hook-switch to On (offhook) so that callers hear a busy signal when the card is not initialized.

If more than one analog-line interface card is installed in a system, you must set the CT Bus jumpers. The CT Bus provides communication and resource sharing among the installed cards. Terminate the JP2 jumper on both cards in a two-card configuration or on cards 1 and 2 in a three-card configuration. See Installing an analog-line interface card for detailed information on setting the JP2 jumper correctly.

Cabling multiple analog-line interface cards

If multiple cards are installed in a system, use a CT Bus cable to connect the cards. See Installing an analog-line interface card for detailed information on cabling multiple cards.

On Message Networking systems ordered with multiple cards, the cards are already cabled.

Connecting phone cables

Each analog-line interface card has four RJ-11 jacks on the rear bracket, numbered J1 through J4. Use the RJ-11 jacks to connect each channel to a PBX. See Connecting the analog-line interface cards for more information.