The Avaya IP500 Universal PRI Trunk Card can
be added to an IP500 Digital Station card, IP500 Analog
Phone card, or IP500 VCM card. It allows that card
to then also support primary rate digital trunk connections. Available in single
and dual versions the IP400 PRI card provides single and dual primary
rate trunk interfaces respectively. The PRI is configurable for T1, E1
or E1R2 MFC use depending on the territory. Details of the supported ISDN
supplementary services and protocols for each PRI are given in the 'Public
and Private Voice Networks' section.
The IP500 Universal PRI trunk cards incorporate
an integrated CSU/DSU. The CSU function allows the trunk to be put in loop-back
mode for testing purposes. This can be set manually, using the monitor application,
or automatically from a Central Office sending a Line Loop Back (LLB) pattern.
The DSU function allows the T1 trunk to be shared between data and voice services.