3EH73031ADJF ALCATEL OmniPCX PBX Expansion Card

The Alcatel 3EH73031ADJF is an APA 8 card providing eight analogue public access ports for connection to the public switched telephone network (PSTN). This trunk interface card enables analogue CO line connectivity, allowing the PBX system to handle incoming and outgoing calls via traditional analogue telephone lines.

Designed for use within the Alcatel OmniPCX Office and OmniPCX Enterprise communication platforms, the APA 8 card slots into the system’s expansion bus to extend trunk capacity. Each port supports standard analogue signalling for interfacing with local exchange lines or analogue trunks from service providers.

The OmniPCX platform is a legacy unified communications system that remains deployed in many enterprise environments. While newer IP-based trunk solutions have largely superseded analogue interfaces, the APA 8 card remains relevant for sites requiring PSTN fallback, hybrid deployments, or locations where analogue lines are still in active use.

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