A voice card that allows four E&M interfaces to be multiplexed to four 64 kbps DS0 (digital signal 0) signals. There are two usage modes for this card, either 1) phone to phone or phone to switch 2) switch to switch.
switch
QFXS Plug-in Card
A voice card that provides four foreign exchange service connections. When CAS (channel associated signaling) is off, it can be used to transmit data. This card goes at the telephone end.
switch
QFXO Plug-in Card
A voice card that provides connections for the PBX (private branch exchange) end. When CAS (channel associated signaling) is off, it can be used to transmit data. This card goes at the PBX end.
switch
Quality of Service (QoS)
A set of performance measures for a communications network that ensures transmission quality and service availability for different types of network traffic.
switch
Quasi-Random Signal Sequence (QRSS)
A test pattern used in BERT (bit error rate testing) to simulate voice signals. Containing many different test patterns, it is the standard test to measure jitter.
switch
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