10/29/2019
Tech Works CI-Series Systems Planning & Installation Manual Page
5
of
42
CI-HSI-41
– Headset Interface
The Tech Works CI-HSI-41 Headset Combiner is designed to take standard Plantronics headsets
and let them talk to each other as well as other Tech Works CI-Buss products. The CI-HSI-41
accommodates up to four Plantronics CS-540 lightweight, Wireless Headsets. The headsets
communicate with each other, as a single headset with four summed microphones.
The Intercom can simply plug together using standard CAT-6 patch cables. When connected to
another unit all headsets become part of that system. Two CI-HIS-41 can be connected together
to make a single system of up to 8 headsets. The eight headsets act as one unit.
Initial setup is accomplished with built in level indicator lights and the controls on the
receiver/charging base. Once completed, no further adjustments should be required.
The CI-HSI-41 can be used as a small stand-alone Wireless Headset Intercom or as an addition
to systems using microphones, speakers, and other CI-Buss and PA-Buss devices. By adding a
PA-402 the headset conversation can be played over ceiling speakers so observers can hear the
conversation.
CI-MSI-22
– Microphone Speaker Interface
The CI-MSI-22 consists of five Functional Modules; Two Inputs; The local Microphone/Line Input
and the PA-BUSS Input, Two Outputs; a 25 Volt Speaker Output and the PA-BUSS Output, and
the CI-BUSS Interface. The Jumper Options determine how these Modules interact and function
with each other. The "Standard Configuration" is a Remote (Single Location) for use with an
Operator Console. The Power Amplifier, is used for a Procedure Room Speaker while the
Microphone Input is used for a boom mounted or hanging Procedure Room Microphone. The PA-
OUT, is used as Procedure Room Monitor Output, perhaps for Background Music. The
PA-IN, may be used for an additional Microphone. The CI-BUSS, may be used with other
Interfaces, such as a CI-HSI-41 to include Headsets.
Initial setup is accomplished with built in level indicator lights and the controls. Once completed,
no further adjustments should be required. Integral ALC, Variable Notch Filters, and Speaker
Ducking allow for full duplex conversations without feedback.
