PRI trunks are provided by the installation of a PRI trunk card into the control unit. avThe IP500 PRI-U trunk card can be configured (see below) to one of those line types. The cards are also available with either 1 or 2 physical ports. The number of B-channels supported by each physical port depends on the line type of the card.

• E1: 30 B-channels and 1 D-channel per port.

• T1: 24 B-channels per port.

• US PRI: 23 B-channels and 1 D-channel per port.

• E1-R2: 30 B-channels and 1 D-channel per port.

IP500 PRI-U Trunk Card Line Type

The IP500 PRI-U card can be configured to support either E1, T1 or E1-R2 PRI line types. To select the line type required, right-click on the line in the group or navigation pane and select Change Universal PRI Card Line Type.

The control unit supports 8 B-channels on each IP500 PRI-U card fitted. Additional B-channels up to the full capacity of IP500 PRI-U ports installed require licenses added to the configuration. D-channels are not affected by licensing.

• For ETSI and QSIG trunks, license instances are consumed by the number of calls in progress on B-channels.

• For T1, E1R2 and ETSI CHI trunks, licenses instances are consumed by the channels set as in service.