FCO DSRZC-F001 (DAS), Composite link probs w/data compression

This document is a Field Change Order (FCO DSRZC-F001) addressing composite link problems with data compression, specifically dropped links between MUXserver 300/310 and DECmux 308/316/332 units.

It applies to all DSRZC-AA/AB (MUXserver 300) at revision E01 or lower, and DSRZC-BA/BB (MUXserver 310) at revision D01 or lower. The solution is to replace the affected unit with a new revision unit. The FCO is not required if MUXserver 300 is at REV F01 or MUXserver 310 is at E01. A prerequisite is that FCO DM300-F001 must be installed on all attached DECmux 300 units.

The document provides FCO kit numbers (EQ-01579-02 through EQ-01579-05) that correspond to different MUXserver 300/310 configurations based on voltage and version. Installation involves powering down the unit, disconnecting cables, and installing the replacement unit per existing documentation. The FCO was released on July 23, 1990, with parts available in August 1990. Charging information for warranty, non-warranty, and material-only options is also detailed.