GL-2
Issue 2.0 April 2000
365-353-255
DACS II Operation and Maintenance ManualGlossary
D
DACS
Digital Access and Cross-Connect System.
Default
A value the system automatically uses for a parameter if you do not specify a value.
Demultiplexer
A device used with a multiplexed signal for recovering signals contained within it and restoring the
distinct individual channels of these signals.
DS0
Digital Signal Level 0 (64-kb/s).
DS1
Digital Signal Level 1 (1.544-Mb/s).
DS1 Data Rate
The DS1 Data Rate is calculated as follows: DS1 = (24 Channels x 8 bit/sample + 1 frame bit) x 8000
samples/sec DS1 = 193 x 8000 = 1.544 Mb/s.
DS1 Port
A DS1 port in either a DS1 interface module or a DS3 interface module.
DS3
Digital Signal Level 3.
DS3U
DS3 Unit.
E
E1 Data Rate
The E1 Data Rate is calculated as follows:
E1 = (32 Channels x 8 bit/sample) x 8000 samples/sec
E1 = 256 x 8000 = 2.048 Mb/s
With this data rate, 30 channels carry traffic and two channels are reserved; one channel contains
framing information and the other channel contains signaling information.
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