Avaya Analog Trunk Card Universal (ATM4U) networking card

Analog Trunk Card Universal (ATM4U) This card supersedes the previous Analog Trunk cards and is referred to as the "ATM4U". It can be identified by a label on the base of the card.

The card is supported on IP Office software 2.1(36) and higher. Unlike the previous ATM4 card, the same ATM4U card variant can be used in all locales.

For systems running IP Office software 3.1 or higher, the echo cancellation used on each trunk can be switched off or on (16ms).

The card provides 4 RJ45 sockets for analog trunk connections. The card only supports loop-start trunks. For ground-start trunks an Analog Trunk expansion module should be used.