MSD-A
The MILSTAR Summing Device – Aircraft version, Telecore part number 2AA-00500, provides MILSTAR Secure Voice Conferencing in support of the National Command Authority mission. A
remote MSD feature is available to allow two MSDs to be connected across a fiber optic link. The dual MSD
configuration provides a mechanism for remotely monitoring audio and controlling the primary MSD for system redundancy/recovery.
The MSD has four primary functions:
• supplements the conferencing abilities of a switch connected to ANDVT Digital Interfaces (ADI)
• provides remote access to conferences at another MSD
• provides the ability to remote a Call Box from a TAC
• provides two RS-422 Remote Control Head (RCH) ports
Features
Ten 4W Audio Channels w/ Adjustable Gain
Four ADI RS-232 Interfaces
Six Standard Type II E&M/RS-232 or Four SVSA Interfaces
Five Speaker Outputs (1W into 8 Ohms)
Four Call Box Interfaces
Two RCH Interfaces
Front Panel LCD and Keypad for local MSD Configuration
Fiber Optic Link for Remote Output of NET and Switch port audio and remote control of local MSD NET ports
The MILSTAR network utilizes several PABX and encryption devices. In some cases, the DSS or SDS, developed
by Raytheon Systems Company is used. In other cases a generic PABX supporting a standard 4W E&M interface
may be used. In either case, a variety of encryption devices are supported. If the SDS or DSS switch is used, then
the STU-III/R interface is connected to the ANDVT via the ADI.
The MILSTAR Summing Device will reside between the PABX and four ADI interfaces. An additional fiber
interface will exist for purposes of interconnecting two MSDs. The MSD is also required to interface directly to the
MILSTAR Call Box, provide speaker outputs, and provide one handset input.
The purpose of the MILSTAR Summing Device is to integrate seamless operation between a PABX and ADI under
various conditions including normal pass through mode and MILSTAR Conferencing mode. The following diagram
shows a typical application of the MSD.
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Interfaces
• 10 4W Audio Channels
• 4 ADI RS-232 Interfaces
• 2 RCH Interfaces
• 5 Speaker Outputs
• 4 Call Box Interfaces
• Six Standard Type II E&M/RS-232 or Four SVSA Interfaces
• Fiber Network
Interface RX
• Fiber Network
Interface TX
• 4 Call Box Interfaces
• Ethernet Port (DB-9)
• External Handset Input
(DB-9) |
