This standard specifies the service capabilities of the Call Hold service within the context of an Integrated Services Digital Network (ISDN).
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ATIS 1000616.1992(R2009)
Original price was: $244.00.$122.00Current price is: $122.00.
Integrated Services Digital Network (ISDN) – Call Hold Supplementary Service (formerly T1.616-1992 (R2009) )
The Alliance for Telecommunications Industry Solutions , 03/01/1992
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