10/29/2019
Tech Works CI-Series Systems Planning & Installation Manual Page
11
of
42
The CI-BUSS
(Collaboration Buss) is a wired network using CAT6 patch cords that have four
signal pairs for bi-directional communication:
“Call”
(Control)
Indicates a Station wants service
“Slave”
(Audio)
Communications
“Master”
(Audio)
Communications
“Alert”
(Control)
Indicates Action is requested
Typical CI-BUSS Chain:
The Collaborative Intercom is made up of a collection of functional active modules, each with its
own functional design.
The CI-ODC, Operator Desk Console is designed to meet the needs of the Operator.
The CI-MSI, Microphone Speaker Interface is designed to meet the needs of the procedure room
microphone and speakers.
The CI-HSI is designed to combine control and process a group of 4 headsets.
By connecting functional modules together, the audio from one can be routed to and shared with
other modules to make a custom system.
CI-Buss Active Unit
CI-Buss Active Unit
CI-Buss Active Unit
CI-Buss Active Unit
MASTER
SLAVE
MASTER
SLAVE
MASTER
SLAVE
AUDIO
AUDIO
AUDIO
Functional module units are always connected CI-Master connector to CI-Slave connector
The signals do not just pass from one unit to another. Each unit has distinct Buss inputs, outputs,
and make up gain so that the Buss stays at a consistent audio level. Each unit has Buss option
jumpers to select what audio from “this” unit is passed to the next unit.
By arranging the order of the units in the chain and selecting what audio is passed along the
installer can determine what each unit “hears”. For instance, if a chain is CI-ODC to CI-MSI to CI-
HSI, the MSI jumpers determine if the Operator hears the HSI and if the HSI hears the Operator.
If you change the order to ODC to HSI to MSI then the HSI determines who hears each other. If
you add a PA-402 Paging and Music amplifier to the system you can plug it into either the MSI or
the HSI and get different content listening results as well as different Music Muting.
