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4.3.3. The setup for SW3: factory default setting all OFF
st
The 1
bit: Ethernet auto-negotiation capability enable/disable
When this bit is switched to off, auto-negotiation capability is enabled.
When this bit is switched to on, auto-negotiation capability is disabled. The working data rate and
duplex mode will be determined by the 2
nd
The 2
bit: Ethernet port data rate
When this bit is switched to off, the data rate is 100M; when switched to on, data rate is 10M.
st
If the 1
bit of SW3 is off, the 2
st
If the 1
bit of SW3 is on, the 2
rd
The 3
bit: Ethernet duplex
When this bit is switched to off, the equipment is at full duplex mode; when switched to on, it is at
half duplex mode.
st
If the 1
bit of SW3 is off, the 3
negotiation fails.
st
If the 1
bit of SW3 is on, the 3
th
The 4
bit: vacant. (it is suggested to be switched off)
th
The 5
bit: Fault-pass-through
The fault-pass-through capability is designed for users who have particular requirements. If this
function is enabled, when there is a fault or the remote Ethernet link is disconnected, the local
Ethernet port will be shut down automatically; when the fault disappeared and remote Ethernet link
is recovered, the local Ethernet port will recover automatically. If the function is disabled, the
Ethernet and V.35 port will always work.
This function is usually used to notify the switch that a link is not proper, when constructing IEEE
802.1d Spanning Tree error tolerance network.
th
The 6
bit: Ethernet auto-MDI/MDIX function
When this bit is switched to off, auto-MDI/MDIX function is enabled. The Ethernet port can be
connected using either straight-through or crossover cable.
When this bit is switched to on, auto-MDI/MDIX function is disabled. Straight-through cable shall be
used to connect with switch; and crossover cable shall be used to connect with network interface
card.
th
The 7
bit: remote loop-back function
Remote loop-back is performed at the optical interface on remote equipment to test and diagnose the
optical link. In order to perform the remote loop-back at optical interface, 2 conditions must be satisfied.
1.
RCMS2X01-30-FV35 multiplexers work point to point, and in pairs (or RCMS2201-30 series
Ethernet multiplexer at the remote site).
2.
The test can only be performed on the 'Master Clock' and 'Terminal Clock' equipment.
As the above figure, the local equipment is set to Master Clock or Terminal Clock mode. The 7
nd
rd
and 3
bits of SW3.
nd
bit is invalid.
nd
bit indicates the actual data rate.
rd
bit indicates the actual duplex mode when Ethernet auto
rd
bit indicates the actual duplex mode.
12
Raisecom Technology Co., Ltd
th
bit
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