Anda telecom Fe1 User manual

FE1 Fiber Modem

Version: V2.1.3

Date: 5.12.2005

User Manual

2-18

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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

User Manual

3-18

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

User Manual

5-18

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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6-18

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

User Manual

7-18

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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8-18

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

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11-18

OFF: Work normally

SW-6

Loop the

remote device

REM ON: Loop

OFF

Table 7. Loop settings

SW-4: ANA Loop local data back, defined as Fig 8:

Fig 8. Loop local data back

SW-5: DIG Loop line back, defined as Fig 9:

Fig 9. Loop line back

SW-6: REM Loop the remote device. Defined as Fig 10:

Fig 10. Loop the remote device

yPATT (SW-7)

BIT7 of SW is PATT test, cooperate with loop settings to check up the

device and line. The result can get by observing PTOK:

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12-18

LOCAL(Internal clock) REMOTE(Line clock) LOCAL

SW-4

ANA

SW-5

DIG

SW-6

REM

SW-7

PATT

SW-4

ANA

SW-5

DIG

SW-6

REM

SW-7

PATT PTOK TEST

CRC_ERR

SPECIFICATION

OFF OFF OFF OFF OFF OFF OFF OFF Not

bright

Not

bright Work normally

ON OFF OFF OFF OFF OFF OFF OFF Not

bright Green Loop local data

back

OFF ON OFF OFF OFF OFF OFF OFF Not

bright Green

Loop line back, the

led of test in the

remote device i s

blinking

OFF OFF ON OFF OFF OFF OFF OFF Not

bright

Blinking

Green

Loop remote

device, the led of

test in the remote

device is bright

ON OFF OFF ON OFF OFF OFF OFF Bright Green Local device test

OK.

OFF OFF OFF ON OFF ON OFF OFF Bright Green

Local device and

optical line test

OK.

OFF ON OFF ON OFF OFF OFF OFF Not

bright Green

Local device in test

mode and loop is

not set right. It is

inanition.

OFF OFF ON ON OFF OFF OFF OFF Bright Green

Local device,

remote device and

optcial line test

OK.

Table 8. PATT testing

NOTE:

After test resume all test and loop switches to the default settings,

（SW4-7）all OFF. Or the device can’t work normally.

yFollow(SW-8)

BIT8 of SW is used to set follow or unfollow the opposite device time slot

settings. Only used in LINE clock and the opposite device Internal clock:

SW Definition Specification 默认设置

OFF: follow

SW-8 Follow

ON: unfollow OFF

Table 9. Settings of follow

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Chapter 3 Installation

3.1 Appearance checking

1) After you received the devices, firstly you should check whether the

packing is well, otherwise, please contact with our company or the

local agent in time so as to solve the problem.

2) After opening the box, you should check whether the device and the

fittings are correct and well according to the incasement list,

otherwise please contact with our company or the local agent.

3.2 Installation process

1) Firstly place the device at a steady position, the working environment

should be dry, tidy, ventilative, and the temperature should be

reasonable.

2) Check whether the clock and time slots control switch are right

before connecting the power supply, the device is set to common

PDH clock when leave factory. For a pair of these devices, one can

be set to internal clock, the other line clock. If the device is used as

single E1 PDH, please set it to default settings common PDH clock.

3) Check the power collocation of FE1 Fiber Modem, if it is DC model,

please pay attention to the voltage value and polarity, then connect

the power supply referring to this manual.

4) Please test the device before using: open the power switch, indicator

(PWR) is bright, which show the power supply is normal; when it

doesn’t connect anything, PWR(Green), OLOS(Red), TX/E1LOS(Red)

are all bright, the others are off.

5) Shut down the power supply, connect the E1 cable and fiber (firstly

examine whether the fiber connectors are clean before connection),

then screw down the fiber protectors gently. Set the clock and time

slots control switch correctly referring to this manual, then open the

power switch, the device will turn into normal working state.

3.3 Installation notice proceeding

1) During the process of transportation and installation, the device

should be protected against vibration and mechanical damages.

2) Pay attention to distribute fiber reasonably, which curvature radius is

≥50mm.

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14-18

3) Please examine the voltage value and whether the polarity is in

accord with the mark on the rear panel before electrifying, or else the

device may be caused permanent damages.

4) Fiber connector can’t be polluted, and it should be cleaned with

alcohol lightly before using. If the fiber connector can’t be connected

correctly, that will cause high power consumption, so you should

adjust it according to the factual situation.

5) The device has already adjusted optimal status before leaving factory,

please don’t take apart the device privately if non technicians of our

company.

6) When the device has failure, you can make sure the failure range

through self-loop function with the device, and contract with

technique service center of our company in time.

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Chapter 4 Troubleshooting

Normal working status: when FE1 Fiber Modem works normally,

PWR(Green) indicator is bright, TX/E1LOS(Green)、RX/E1LOF(Green)

indicators are blinking, the others are off.

When the device has failure, firstly make sure the failure range according

to the status of the indicators, then deal with the problem.

yTrouble phenomenon: no reaction after electrifying

Diagnosis:

Examine the power supply, if it is DC model, make sure the polarity, if

the wire is connected inversely, please correct it! If it is AC model,

please make sure whether the power switch is open.

Exclusion:

Correct the power connection or open the power switch.

yTrouble phenomenon: TX/E1LOS indicator is blinking

Diagnosis:

The E1 cables connection of local device is normal, those of remote

device is abnormal or don’t be connected.

Exclusion:

Examine whether the receiving and transmitting E1 cables are inverse,

if so please correct them; whether the E1 connectors are loosened, if

so please make them again.

yTrouble phenomenon: RX /E1LOS indicator is blinking

Diagnosis:

E1 of the remote device is frame-asynchronous.

Exclusion:

Adjusttheclockandtimeslots settings of remote device referring to

this manual, so that the device works at correct status.

yTrouble phenomenon: OLOS indicator is bright

Diagnosis:

The device is set to internal clock, loopback the input and output

ports via fiber, if this indicator is off, then mainly examine the fiber

line.

Exclusion:

If the fiber connector is polluted, then clean it with alcohol or

exchange it. If the line has failure, then examine the line by technical

engineers.

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yTrouble phenomenon: some data has lost during the course of

communication

Diagnosis:

There are two internal clocks or no internal clocks in the whole line,

which will lead to some data lost or not through.

Exclusion:

Make sure that there is only one internal clock and others are line

clock in one line.

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Chapter 5 Appendix Table

(PCM31)

1920K (PCM31)

1856K (PCM31)

1792K (PCM31)

1728K (PCM31)

1664K (PCM31)

1600K (PCM31)

1536K (PCM31)

1472K (PCM31)

1408K (PCM31)

1344K (PCM31)

1280K (PCM31)

1216K (PCM31)

1152K (PCM31)

1088K (PCM31)

1024K (PCM31)

960K (PCM31)

896K (PCM31)

832K (PCM31)

768K (PCM31)

704K (PCM31)

640K (PCM31)

576K (PCM31)

512K (PCM31)

448K (PCM31)

384K (PCM31)

320K (PCM31)

256K (PCM31)

192K (PCM31)

128K (PCM31)

64K (PCM31)

Rate SW

OFF

0

ON

1

ON

2

ON

3

ON

4

ON

5

ON

6

ON

7

ON

8

ON

9

ON

10

ON

11

ON

12

ON

13

ON

14

ON

15

ON

16

ON

17

ON

18

ON

19

ON

20

ON

21

ON

22

ON

23

ON

24

ON

25

ON

26

ON

PCM31

27

ON

Blank is OFF!

28

ON

29

ON

30

ON

31

Reference Table of Time Slot Settings

——

PCM31

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2048K

1920K (PCM30)

1856K (PCM30)

1792K (PCM30)

1728K (PCM30)

1664K (PCM30)

1600K (PCM30)

1536K (PCM30)

1472K (PCM30)

1408K (PCM30)

1344K (PCM30)

1280K (PCM30)

1216K (PCM30)

1152K (PCM30)

1088K (PCM30)

1024K (PCM30)

960K (PCM30)

896K (PCM30)

832K (PCM30)

768K (PCM30)

704K (PCM30)

640K (PCM30)

576K (PCM30)

512K (PCM30)

448K (PCM30)

384K (PCM30)

320K (PCM30)

256K (PCM30)

192K (PCM30)

128K (PCM30)

64K (PCM30)

Rate SW

ON

OFF

0

ON

1

ON

2

ON

3

ON

4

ON

5

ON

6

ON

7

ON

8

ON

9

ON

10

ON

11

ON

12

ON

13

ON

14

ON

15

OFF

16

ON

17

ON

18

ON

19

ON

20

ON

21

ON

22

ON

23

ON

24

ON

25

ON

26

ON

PCM30

27

ON

Blank is OFF!

28

ON

29

ON

30

ALLOFF

ANY Settings

ON

31

Reference Table of Time Slot Settings

——

PCM30

Anda Telecom FE1 User manual

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