RCH3000
The Motorola RCH3000 is an SB9600 Desk Console for remote control of Astro, MCS2000, and iDEN radios.
Overview
The RCH3000 was intended for dispatch centers or offices where a normal radio control head and microphone would be impractical or would look out of place. The deskset emulates a Model 3 control head for the MCS2000 and iDen mobiles, or a W9 head for the Astro Spectra, Spectra Plus, and XTL5000 radios. Connections are made between the radio and the deskset via a junction box or directly to the radio via an accessory connector. Details about the installation and connection can be found in the installation section or in the manual.
Installation & Manual
Manual
I've scanned and uploaded the RCH3000 manual as I recently found one and I've not seen it posted anywhere else.
68-81129E92-C RCH3000 Installation & Operation Manual with Schematics
Radio Connection
More information to come as I write some more!