Mitel 9109-610-101-NA SX-200 / SX-2000 / 3300 ICP telephone system PBX Card / Module

The Mitel 9109-610-101-NA is a Main Control III-EL card running at Stratum 4 clock accuracy, the central processing card for the SX-200 EL (Enterprise Line) controller variant. Main Control cards handle call processing, system timing and peripheral coordination for the whole SX-200 cabinet; Stratum 4 is a lower clocking accuracy grade than Stratum 3, typically adequate where the system derives its timing from an upstream network reference rather than needing to hold its own precise clock. It is a genuine Mitel part for the SX-200/SX-2000/3300 ICP telephone system range. Tech-Star (UK-based, shipped worldwide) sources and tests genuine Mitel parts like this one to support ongoing SX-200/SX-2000/3300 ICP maintenance work.