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APPENDIX F
Also known as the Communications Bus, it is used to convey configuration, diag-
MP Bus
nostic, and alarm information between the System Control and all other modules
in the system.
Term used to refer to a group of three or more nodes connected together with ag-
Network
gregate trunks.
Any addressable location within a network capable of carrying a TMS-3000, TMS
Node
Compact, Univ. MM+ V4 or MINIMUX TDM circuit. In a network, a TMS-3000 in
Philadelphia or a Univ. MM+ V4 in Boston are nodes.
A card that plugs into a base card. The piggyback is a separate assembly that can
Piggyback Card
be tested, removed, and replaced as a unit.
See "card".
Printed Circuit
Board (pcb)
A logical path through a network from the transmitting equipment to the receiving
Route
equipment. The path can go through several nodes.
An external group of modules that connects into the External Timing socket on
Station Clock
the Main Harness Card. It monitors two incoming master clock sources (such as
DDS). One of the clock sources is kept on stand-by in case the other goes down.
The incoming signal is used as the master clock for the network.
A D4 frame consists of 1 frame bit followed by 24 eight-bit time slots. A D4 super-
Superframe
frame contains 12 consecutive 193-bit frames.
Information which travels from the System Control Module via the MP Bus. It
Supervisory Data
does not have any immediate bearing on the data being multiplexed. Instead, it
keeps supervisory software in various parts of the system up to date.
A link over each aggregate trunk. It is reserved for supervisory information
orig-
System Communica-
inating at the System Control Module and takes up the bandwidth occupied for
tions Link
channel 0 on the aggregate.
A Time Division Multiplexer processes two or more channels of data for trans-
TDM
mission over a shared trunk.
See "Aggregate Trunk."
Trunk
Provides full duplex voice communication capabilities in a TMS-3000, TMS
Universal Voice Card
Compact, Univ. MM+ V4 or MINIMUX TDM. Pulse Code Modulation (PCM),
Adaptive Differential Pulse Code Modulation (ADPCM) and Advanced Speech
Processing (ASP) card configurations are available. The card converts analog
voice signals to a sync data rate of 64 kHz for PCM and 32 kHz, 24 kHz and 16
kHz for ADPCM.
F-3
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