55..33 E1 Setup and StatusE1 Setup and Status
E1
represents the 2.048 Mbit/s PDH layer. The Ports SetupPorts Setup screen gives you
access to the PDH layer setup for the transmitter and/or receiver of the
currently selected port.
Plesiochronous Digital Hierarchy (PDH) refers to the technology originally used in
telecommunications networks to transport data over digital transport equipment
such as fiber optic systems.
E1 allows transmission of data streams that are nominally running at the same rate,
however allowing for some variation in the speed around a nominal rate (±125 ppm
variation around 2 Mbit/s).
The E1 frame has 32 time slots during 125μs, and one time slot contains eight bits.
The time slot 0 is used for multi frame.
E1 Frame structureE1 Frame structure
The E1 interface uses the electrical BNC connectors (unbalanced) or the electrical
RJ48 connectors (balanced).
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