The user’s data port has two timing modes:
z
DCE –
WireSpan 600 provides transmit and receive clocks for
the user’s equipment connected to the data port. And accepts
XTC clock from the equipment.
Figure 1-3
shows the flow of
timing signals through the user’s data port in the DCE mode.
TXC
RXC
XTC
DTE
WireSpan 600/610
Figure 1-3 DCE
Description
z
DTE –
WireSpan 600 sends the receive data accompanied by the
receive clock to the user’s equipment connected to the data port,
and accepts data from the equipment according to the equipment
transmit clock.
Figure 1-4
shows the flow of timing signals
through the user’s data port in the DTE mode.
TXC
RXC
XTC
WireSpan 600/610
DCE
Figure 1- 4
DTE
Description
E1 Interface Characteristics
The WireSpan 600 E1 link interface meets the requirements of ITU-T
Rec. G.703, G.704, G.706, G .823.
The E1 link has two line interfaces: a 120-ohm balanced line interface
terminated in a RJ-48 eight-pin female connector, and a 75-ohm
unbalanced interface terminated in two BNC female coaxial connectors.
Line coding is HDB-3 or AMI. The nominal balanced interface transmit
level is ±3V, and the unbalanced interface transmit level is ±2.37V. Jitter
performance complies with the requirements of ITU-T Rec. G.823.
1-4
