Rev. 2 - 02/09
Copyright© 1998-2009, Alpha Communications®, All Rights Reserved
42 Central Drive • Farmingdale NY 11735-1202 • Phone (631) 777-5500 • Fax (631) 777-5599
TOLL-FREE 1-800-666-4800 • Web: www.AlphaCommunications.com • Email: firstname.lastname@example.org
ARCHITECTS' AND ENGINEERS'
The rack mount master station(s) shall be Alpha
Communications®/Ring model AA903RK or ap-
proved equivalent. Master(s) shall have clear two-
way communications. Master(s) shall feature a 12-
button keypad, and shall require simple home-run
wiring. Master(s) shall be rack mounted using a
custom-supplied 19" (standard type) equipment rack.
Contractor shall provide for adequate ventilation and
electrical power, for all equipment mounted in the
rack.. Unit faceplate shall be a matte black painted
Master(s) shall be used with the RM5000EX and/or
CB901 series microprocessor intercom systems.
Contractor shall observe all local and national elec-
trical and building codes.
Due to continuous product improvement, all colors, sizes, materials,
finishes and specifications are subject to change without notice.
AA903RK Rack Mount
The AA903RK is designed for use as a rack-mounted unit, which will
fit into a customer-supplied 19" (standard type) equipment rack.
The unit features a matte black painted aluminium frontplate with
speaker and microphone for normal handsfree speech with a range of
approximately 3-5 meters or 10-15 feet. Its keyboard section contains
a warning lamp and 12 buttons plus a privacy switch, which also
functions as a microphone cut-out switch when pressed during a
On the touch-dial keyboard, the left-hand T-button is provided for
manual control of a conversation when desired. The X-button is used
to cancel a call.
The station permits the connection of a parallel speaker where
additional output is required (loudspeaker impedance 50 ohms
recommended). The station is designed to work with the RM5000EX