Anda Telecom FE1 User manual

FE1 Fiber Modem
Version: V2.1.3
Date: 5.12.2005

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C
Co on nt te en nt ts s
Chapter 1 Introduction..........................................................................3
1.1 Description................................................................................................ 3
1.2 Characteristics ........................................................................................... 3
1.3 Technical Parameters ................................................................................. 3
Chapter 2 Operation .............................................................................5
2.1 Front Panel ................................................................................................ 5
2.1.1 Indicators........................................................................................... 5
2.2 Back Panel................................................................................................. 6
2.2.1 Power Supply .................................................................................... 6
2.2.2 E1 Interface........................................................................................ 7
2.2.2 Optical Port....................................................................................... 8
2.2.4 Time Slots Settings ............................................................................. 8
2.2.5 Settings of SW.................................................................................... 9
Chapter 3 Installation..........................................................................13
3.1 Appearance checking............................................................................... 13
3.2 Installation process................................................................................... 13
3.3 Installation notice proceeding................................................................... 13
Chapter 4 Troubleshooting ..................................................................15
Chapter 5 Appendix Table...................................................................17

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Chapter 1 Introduction
1.1 Description
FE1 Fiber Modem is designed based on an ASIC chip. The chip adopts
special patent technology of reduced dithering, digital phase locked and
distill clock, E1 anti-jamming, etc. The inner software and hardware are all
modularity, integrating coding, decoding, message insertion and alarm,
and make the circuit simple so as to improve the reliability of the device.
1.2 Characteristics
yDithering tolerance and dithering transmission characteristic of E1
channel have high performance, which is superior to industry
standard
ySupport CAS and CCS mode
ySupport CRC-4 verifying
yFollowing remote device settings can be set
yData rate of E1 interface N×64kbps(N=1~32) is adjustable
yFour clock modes are selectable
yThe circuit is designed simply, the device works steadily
1.3 Technical Parameters
Data rate: N×64Kbps（N=1~32）
Tolerance: ±50ppm
Line code: HDB3
Electric characteristic: comply with ITU-T G.703 standard
Dithering characteristic: comply with ITU-T G.823 standard
Dithering tolerance: comply with ITU-T G.823 standard
E1
Interface
Impedance: 75Ωunbalanced/ 120Ωbalanced
Wavelength: 1310nm (Standard)/ 1550nm (Optional, declare
when order)
Distance: 40km (Standard)/ 60km-80km-120km (Optional,
declare when order)
Optical
interface
Line code: 1B1C

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Output optical power: ＞-12dBm
Receiver style : PINFET
Receiving sensitivity: ＜-36 dBm BER≤10-10
Light source : LD
Optical connector format: FC (Standard)／SC (Optional,
declare when order) / ST (Optional, declare when order)
Optical connector: Dual-fiber (Standard) / Single-fiber
(Optional, declare when order)
Clock mode
Internal clock
Line clock
External clock
Common PDH mode (default)
Voltage: AC110V/AC 220V/DC –48V/DC –48V/DC +24V
Power
supply Power consumption: ≤5W
Environment
Working temperature: 0°C~50°C
Storage temperature: -40°C~+70°C
Relative humidity: 5%~95 %
Weight 0.4Kg
Size 212mm×150mm×38mm

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Chapter 2 Operation
2.1 Front Panel
Fig 1. Front panel of FE1 Fiber Modem
2.1.1 Indicators
There are seven indicators in the front panel of FE1 Fiber Modem, from right to
left:
yPWR Green Indicator of power supply
Bright when power is on
yOLOS Red
Alarm indicator of optical code-breaking
Bright when local device optical code-breaking
Blinking when remote device optical
code-breaking
Local has higher priority
yOLOF Red
Alarm indicator of optical frame-lost
Bright when local device optical frame lost
Blinking when remote device optical frame lost.
Local has higher priority
yTX/E1LOS Dual
colors
Indicator of E1 data transmittal and E1
code-breaking alarm
Green: Blinking when E1 data transmitted.
Red: Bright when local device E1 code-breaking
Blinking when remote device E1
code-breaking
Local has higher priority
yRX/E1LOF Dual
colors
Indicator of E1 data receiving and E1 frame-lost
alarm
Green: Blinking when E1 data received.
Red: Bright when local device E1 frame lost
Blinking when remote device E1 frame lost.
Local has higher priority
yPTOK Green
Indicator of test result
OFF when device work normally
Bright when the test result is right

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yTEST/
CRC_ERR
Dual
colors
Indicator of test and CRC verify error
OFF when device work normally
Red: Bright when local CRC verify error
Blinking when remote CRC verify error
Green: Bright when device in test mode
Blinking when remote device in test mode
Table 1. Specification of front panel indicators
NOTE:
TX/E1LOS and RX/E1LOF maybe bright red and green at the same time,
take observation carefully.
2.2 Back Panel
Fig 2. Back panel of FE1 Fiber Modem (AC)
Fig 3. Back panel of FE1 Fiber Modem (DC)
2.2.1 Power Supply
AC socket: AC 220V input.
DC socket:
If the power supply is +48V, connect the device + pole with power +48V
pole, the device – pole with power GND. +24V power supply must be
used with DC+24V model device:
Fig 4. Sketch map of DC+48V connection

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If the power supply is -48V, connect the device + pole with power GND
pole, the device – pole with power -48V:
Fig 5. Sketch map of DC-48V connection
NOTE:
Please check the power polarity carefully, and connect after everything is
confirmed. Otherwise the equipment may be caused the forever damages
and we won’t take any responsibility because of this!
2.2.2 E1 Interface
E1 75Ω/120Ωcontrol switch
STATE 75 /120 INTERFACEΩΩ
120Ωbalanced interface
75 unΩbalanced interface
Table 2. Definition of E1 75 /120 switchΩΩ
75Ωunbalanced E1 interface connector are BNC connector, RX indicate
E1 input, TX indicate E1 output;
120Ωbalanced E1 interface connector is RJ45 connector, the pin
assignment definition as follows:
Fig 6. Sketch map of RJ45 connector
120Ωbalanced E1 interface pin assignment:
PIN 1 2 3 4 5 6 7 8
Definition TxD+ TxD- RxD+ RxD-
Table 3. Pin assignment of 120Ωbalanced E1 interface

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2.2.2 Optical Port
Standard SC / FC /ST connector, TX indicates input, RX indicates output.
NOTE:
Don’t stare at optical module TX port!!!
2.2.4 Time Slots Settings
Time slot settings switch for FE1 Fiber Modem is located at the bottom of
the device. On the bottom board of FE1 Fiber Modem, there is a quadrate
slot. Under the slot, there are four 8-bit Dips (totally 32 bits) for setting E1
time slots. From left to right NO.0~NO.31 bit corresponding E1 TS0~TS31,
ON when opening up the corresponding time slot, OFF when closed.
Fig 7. Bottom panel of FE1 Fiber Modem
Settings of time slot defined as below table (see the Chapter 5 Appendix
Table in detail):
SW Status Function Status Function Default
ON Unframed 2048KBps / /
0 OFF OFF OFF
16 ON
CCS (PCM31) OFF CAS (PCM30) OFF
1 ON TS1 is available OFF TS1 is invalid OFF
2 ON TS2 is available OFF TS2 is invalid OFF
3 ON TS3 is available OFF TS3 is invalid OFF
4 ON TS4 is available OFF TS4 is invalid OFF
5 ON TS5 is available OFF TS5 is invalid OFF
6 ON TS6 is available OFF TS6 is invalid OFF
7 ON TS7 is available OFF TS7 is invalid OFF
8 ON TS8 is available OFF TS8 is invalid OFF

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9 ON TS9 is available OFF TS9 is invalid OFF
10 ON TS10 is available OFF TS10 is invalid OFF
11 ON TS11 is available OFF TS11 is invalid OFF
12 ON TS12 is available OFF TS12 is invalid OFF
13 ON TS13 is available OFF TS13 is invalid OFF
14 ON TS14 is available OFF TS14 is invalid OFF
15 ON TS15 is available OFF TS15 is invalid OFF
16 ON TS16 is available OFF TS16 is invalid OFF
17 ON TS17 is available OFF TS17 is invalid OFF
18 ON TS18 is available OFF TS18 is invalid OFF
19 ON TS19 is available OFF TS19 is invalid OFF
20 ON TS20 is available OFF TS20 is invalid OFF
21 ON TS21 is available OFF TS21 is invalid OFF
22 ON TS22 is available OFF TS22 is invalid OFF
23 ON TS23 is available OFF TS23 is invalid OFF
24 ON TS24 is available OFF TS24 is invalid OFF
25 ON TS25 is available OFF TS25 is invalid OFF
26 ON TS26 is available OFF TS26 is invalid OFF
27 ON TS27 is available OFF TS27 is invalid OFF
28 ON TS28 is available OFF TS28 is invalid OFF
29 ON TS29 is available OFF TS29 is invalid OFF
30 ON TS30 is available OFF TS30 is invalid OFF
31 ON TS31 is available OFF TS31 is invalid OFF
Table 4. Settings of Time Slot
NOTE:
1) E1 framing status depends on NO.0 bit, OFF is framed, ON is
unframed.
2) E1 PCM30 or PCM31 depends on NO.16 bit, OFF is PCM30, TS16 is
used for transmitting singling; ON is PCM31, TS16 is used for
transmitting 64K data, if more than 64K, keep NO.16 bit ON and
open other bits.
3) All OFF is unframed, the rate is 2048KBps.
4) Default settings is all OFF.
2.2.5 Settings of SW
ySummary
An 8-bit switch is in the back panel, signed by “SW”. Definition (from left
to right):

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SW CLOCK NC LOOP PATT FOLLOW
BIT 1 2 3 4 5 6 7 8
DEFAULT OFF OFF OFF OFF OFF OFF OFF OFF
TITLE SW-1 SW-2 SW-3 SW-4 SW-5 SW-6 SW-7 SW-8
Table 5. Default settings of SW
yCLOCK Settings (SW-1、SW-2)
CLOCK SETTINGS
SW-1 (close the power) SW-2 Clock mode
ON ON INTERNAL clock
OFF ON
LINE clock (follow the opposite
device Time Slot settings)
ON OFF EXTERNAL clock
OFF OFF PDH mode (default)
Table 6. Clock settings
Internal clock (ON, ON): The clock generated by internal oscillator.
Line clock (OFF, ON):
The clock recovered from receiving E1
signal, under this settings the device can
auto follow the opposite device Time slot
settings if the opposite device is Internal
clock.
External clock (ON,OFF): Recovery clock from receiving E1 signal.
Common PDH mode
(OFF, OFF):
Device used as a PDH, and can transmit
any E1 signal.
NOTE:
1) Guarantee that there is only one Internal clock device in one chain.
2) Avoid that all device in one chain don’t set as Line clock. But usually
FE1 Fiber Modem used as PDH, set it PDH mode.
yLOOP Setting (SW-4, SW-5, SW-6)
BIT4, BIT5, BIT6 of SW (SW-4、SW-5、SW-6) are LOOP Setting, defined as
below:
SW DEFINITION SPECIFICATION DEFAULT
OFF: Work normally
SW-4
Loop local data
back
ANA ON: Loop
OFF
OFF: Work normally
SW-5 Loop line back
DIG ON: Loop
OFF