5.3 E1 Setup and Status
E1 represents the 2.048 Mbit/s PDH layer. The Ports 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 structure
The E1 interface uses the electrical BNC connectors (unbalanced) or the
electrical RJ48 connectors (balanced).
MU100010A Connector Panel
5.3.1 Transmitter Setup
5.3.1.1 Physical Setup
When the transmitter is set up with only an E1 interface, touching the Tx
button in the navigation area will launch the following screen.
Switching between PDH Tx and DSn Tx is done in the SDH/SONET transmitter
setup screen.
1. Select SDH Tx or SONET Tx check box.
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