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Voice switch vs Data switch-Difference between voice switch and data switch

This page on Voice switch vs Data switch describes difference between voice switch and data switch.

As we know switches are used at electronic exchanges for providing connections between various input and output lines in general. The switches are designed based on the applications of their use. There are switches for voice and data switching/routing.

Voice Switch

The switch which takes care of switching of voice analog lines is referred as voice switch. Following table summarizes basic technical specifications of voice switch used at satellite hub station.


Voice switch specifications Description
Capacity 36 ports, connectivity configuration as desired by user through software programming
Interface 32 ports on 4W E&M towards the Hub, 4 ports on A/A (-48V)
Traffic Non blocking switch
Signalling type Decadic
Numbering 3 to 7 digits for local
32 VSATs on local numbering on a single route
Features 3 digit analysis for outgoing route,
2 digit insertion on Incoming side
3 digit absorption on outgoing route
rotating priority on trunk allotment
Power input -48V , 2A approx.

Data Switch

The switch which takes care of switching of data digital lines is referred as data switch. The data lines can be based on RS232/RS485/RS422 interfaces available. Following table summarizes basic technical specifications of data switch used at satellite hub station.


Data switch specifications Description
Ports 32 Async. RS 232C at a max. speed of 4.8Kbps including VSAT and user connections(4.8Kbps per line card having 4 ports)
; 64 Kbps sync. line with RS422 interface
Services SVC/PVC
protocol CCITT 1984, X.3/X.28
Flow Control XON/XOFF, RTS/CTS
Link activate signals DTR/DSR
Power supply -48V DC

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