Abeo LAN over G.703 Extender
11
3.1.2 Timing
TIMING
determines the source for the LINE E1 transmit clock, and is set by bit-switch no1. The
options are
ON
or
OFF
.
With the switch set to
ON
, the E1 transmit clock is derived from the MXU9020’s own internal
oscillator.
With the switch set to
OFF
, the E1 transmit clock is derived from the LINE E1 receive clock.
3.1.3 E1 Port select RJ-45/BNC
3.1.4 Loopback test
This switch is used to initiate loop testing. It is fully described in the next section.
The switch is set to
ON
for normal operation of the unit without any loopbacks.
With the switch set to
OFF
, Loopback is applied, so that Trasnmit data = Received data on the
E1 port.
3.1.6 Auto MDI/MDI-X
With switch set to
ON
,the LAN ports are fixed as MDI-X for direct connection to a PC. This
may be necessary for reliability when connecting some older non-autos hubs.
With switch set to
OFF,
the LAN ports automatically sense the interface and switch between
MDI and MDI-X connections.
This single switch is used to select which type of connector (RJ-45 or BNC) is to be used to
connect the E1 line.
With the switch set to
ON
, the BNC ports are selected to give G.703 75 ohm unbalanced
interface.
With the switch set to
OFF
, the RJ-45 port is seleceted to give G.703 120 ohm balanced
interface.
3.1.5 LAN mode
Bit-switch
ON
: 100 Mbps Full Duplex operation.
Note that this option enables 100m full duplex connection to be implemented. Auto-negoti-
ate does not distinguish betweenfull versus half duplex modes when negotiating with a
fixed (i.e. non-negotiating) 100 Mbps port.
Bit-switch
OFF
: Auto-negotiate Mode (default).
3.1.7 E1 Line Port
Bit-switch
ON
: The LAN ports are fixed as MDI-X for direct connection to a PC. This may be
necessary for reliability when connecting some older non-auto hubs.
Bit-switch
OFF
: The LAN ports automatically sense the interface and switch between MDI and
MDI-X connections.
Summary of Contents for Abeo G.703 LAN
Page 18: ......
