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APPENDIX F
MP Bus
Also known as the Communications Bus, it is used to convey configuration, diag-
nostic, and alarm information between the System Control and all other modules
in the system.
Network
Term used to refer to a group of three or more nodes connected together with ag-
gregate trunks.
Node
Any addressable location within a network capable of carrying a TMS-3000, TMS
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.
Piggyback Card
A card that plugs into a base card. The piggyback is a separate assembly that can
be tested, removed, and replaced as a unit.
Printed Circuit
Board (pcb)
See "card".
Route
A logical path through a network from the transmitting equipment to the receiving
equipment. The path can go through several nodes.
Station Clock
An external group of modules that connects into the External Timing socket on
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.
Superframe
A D4 frame consists of 1 frame bit followed by 24 eight-bit time slots. A D4 super-
frame contains 12 consecutive 193-bit frames.
Supervisory Data
Information which travels from the System Control Module via the MP Bus. It
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.
System Communica-
tions Link
A link over each aggregate trunk. It is reserved for supervisory information orig-
inating at the System Control Module and takes up the bandwidth occupied for
channel 0 on the aggregate.
TDM
A Time Division Multiplexer processes two or more channels of data for trans-
mission over a shared trunk.
Trunk
See "Aggregate Trunk."
Universal Voice Card
Provides full duplex voice communication capabilities in a TMS-3000, TMS
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