Rev. 1 - 12/03
ARCHITECTS' AND ENGINEERS'
The speaker/microphone and control unit(s) shall be
Alpha Communications®/S.T.R.™ ReliaBUS™
model TT212 or equivalent. Unit(s) shall be pow-
ered by the model SP300 ReliaBUS™ controller.
All wiring to power supply/amplifier shall be low-
voltage Class II wiring, installed as per all federal,
state, and local electrical codes.
TT212 shall be designed to mount directly into the
'TT' or 'TTM' series lobby entry panel stations.
TT212 shall contain the speaker and microphone
and memory circuits for up to 24 of the HT3011
handsets, all in one 'snap-in' assembly. Unit shall
snap onto the panel front speaker/microphone grille.
TT212 shall provide the intercom amplification and
signalling control for the proper system operation.
TT212 shall be installed a safe distance from any
source of electrical interference.
Contractor shall observe all local and national elec-
Copyright© 2003, 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: email@example.com
These Alpha Communications® TT212 ReliaBUS™
speaker/microphone control module is used with the
HT3011 series ReliaBUS™ handset stations to provide
intercom amplification and power to operate the asso-
ciated intercom system, and certain optional compo-
nents and/or accessories, such as electric door
The TT212 is used in conjunction with the SP300
These TT212 speaker/microphone control modules
are designed to easily mount right onto the plastic
speaker/microphone grille in the 'TT' and 'TTM' series
lobby entry intercom panels.
The TT212 can accommodate up to 24 of the HT3011
ReliaBUS™ handsets, when used with conventional
push-button type door station(s).
Easily Installs Right Behind Lobby Entry Panel
• Operates on Safe Low-Voltage Clas