w w w . g o d y n a m i x . c o m
User Manual
3
Chapter 2
Technical Specifications
2.1 Technical specifications of the E1 interface
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Bit Rate: 2048Kbps±50ppm
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Coding: HDB3
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Interface Type: RJ-45
¾
Interface Impedance: 120
Ω
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Physical characteristic: comply with ITU-T G.703 recommendations
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Transfer characteristic: comply with ITU-T G.823 recommendations
¾
Jitter tolerance: comply with ITU-T G.823 recommendations
2.2 Technical specifications of Ethernet interface
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Interface type: RJ-45
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Standard compliance: IEEE802.3
IEEE802.3u
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Working mode: 10/100Mbps full-duplex/half-duplex selectable
Auto-negotiation/forced mode selectable
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Flow control: For Ethernet interface working in full-duplex mode, IEEE802.3x flow control
is supported.
For Ethernet interface working in half-duplex mode, back pressure flow control
is supported.
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Auto-MDI/MDIX function: in support of Auto-MDI/MDIX, this function will become
ineffective if the Auto-negotiation function of the interface is disabled.
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Other features: in support of IEEE802.1d Spanning Tree and IEEE802.1q VLAN packet
transparent transmission
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Maximal data frame in support: Ethernet data frame of 1784 bytes
2.3 The technical specifications of the optical interface
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Bit rate: 150Mbps
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Line coding: scrambled NRZ
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Interface type: SC interface
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Optical transmission parameter: different optical transceivers have different optical interface
parameters, please see the table below.
Optical
transceive
r
Interface
Type
LASER Receiver
Wavelength
(nm)
TX
Optical
Power
(dBm)
Overload
(dBm)
Receiving
Sensibility
(dBm)
Transmission
Distance (Km)
S1
DSC/PC
FP
PIN
1310
-15~-8
> -8
< -34
0 ~ 25
S2
DSC/PC
FP
PIN
1310
-5~0
> -8
< -34
10 ~ 60
S3
DSC/PC
DFB
PIN
1550/DFB
-5~0
> -10
< -36
15 ~ 120
SS13
SC/PC
FP
PIN
TX:1310
-12~-3
> -8
< -30
0 ~ 25
