ROF1375338/3 Ericsson Ericsson AXE Telecom System Card

The Ericsson ROF1375338/3 is a TLU 76 Trunk Line Unit providing 30 ports with Channel Associated Signalling (CAS) capability. This module handles trunk line connections between the telephone exchange and external networks, processing voice traffic through dedicated signalling channels embedded within the transmission path.

The TLU 76 is designed for deployment within Ericsson AXE digital switching platforms, which have been widely used by telecommunications operators for public switched telephone network (PSTN) infrastructure. The 30-port configuration allows connection to E1 trunk circuits using traditional CAS protocols for call setup and teardown signalling.

This is a legacy product from Ericsson’s established AXE exchange portfolio. While these systems are being phased out in many regions as operators migrate to IP-based infrastructure, significant installed bases remain operational worldwide, creating ongoing demand for replacement and maintenance units.

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