Modular Multi-service Integrated Optical Transmission Multiplexer
User Manual
18
Performance of Ethernet interface:
Accord
with
the
standards
IEEE802.3/u
10Base-T
and
10/100Base-TX/FX
Supporting 802.3x full duplex flow control and Back Pressure half
duplex flow control
Chain alarm function of LinkLoss
Parallel or twisted pairs are mated by auto-negotiation.
§6.7.3 Bottom Board Preset Holes
There is a 4-digit patch switch inside the 4 small rectangular holes on
the bottom board of equipment.
I) When the plug-
in interface board is G.703 (4×E1) interface board,
the switch is used as impedance match for E1 interface. The switch is set
up as per ordering instructions at the ex-work time. User can also make
field
modification.
(Attention:
External
adapter
must
be
corresponding!)
1 (The 1
st
E1)
2 (The 2
nd
E1)
3 (The 3rd E1)
4 (The 4th E1)
ON
OFF
ON
OFF
ON
OFF
ON
OFF
75
Ω
120
Ω
75
Ω
120
Ω
75
Ω
120
Ω
75
Ω
120
Ω
II) When the plug-
in interface board is 2×V.35, the switch is used as
the clock setup for V.35 interface.
1
2
3
4
ON
ON
2 V.35 clocks in anti-phase
ON
ON
2 V.35 master reference
clocks
ON
OFF
The 1
st
V.35 clock in
anti-phase
ON
OFF
OFF
ON
2 V.35 external clocks
OFF
ON
The 2
nd
V.35 clock in
anti-phase
OFF OFF
Neither of the two V.35
clocks in anti-phase
OFF OFF 2 V.35 slave clocks
