Cronyx Fmux/s-4e1-e2 User manual

Multiplexer

FMUX/S-4E1-E2

4 E1 Channels

E2 Link

Installation and Operation Manual

Document Version: 1.0E / 14.12.2007

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Contents

Section 1. Introduction ....................................................... 5

1.1. Application ................................................................................................. 5

1.2. FMUX/4 family overview .......................................................................... 6

1.3. Ordering information .................................................................................. 7

1.4. Technical specifications ............................................................................. 7

E1 interface ...................................................................................... 7

E2 interface ...................................................................................... 7

Emergency alarm interface ............................................................... 8

Console port...................................................................................... 8

SNMP management port ................................................................... 8

Diagnostic modes .............................................................................. 8

Dimensions and weight ..................................................................... 9

Electric power supply ....................................................................... 9

Operating conditions ......................................................................... 9

Section 2. Installation ....................................................... 10

2.1. Site requirements...................................................................................... 10

2.2. Delivered items ........................................................................................ 10

2.3. Cable connections .................................................................................... 11

Power supply connector.................................................................. 11

Ground terminal .............................................................................. 12

E2 link TX and RX connectors ....................................................... 12

E1 port connectors .......................................................................... 12

SNMP port connector ..................................................................... 13

Console port connector ................................................................... 13

Emergency alarm connector ........................................................... 14

Section 3. Operations ....................................................... 15

3.1. Indicators ................................................................................................. 15

3.2. Emergency alarms .................................................................................... 17

3.3. Device responses to emergencies ............................................................. 18

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3.4. Loops ....................................................................................................... 19

Normal mode .................................................................................. 19

Port loop ......................................................................................... 20

Tributary loop ................................................................................. 20

Local loop on the link ..................................................................... 21

Link remote loop............................................................................. 21

3.5. Built-in BER tester ................................................................................... 22

Section 4. Control via the console port ........................... 24

4.1. Upper level menu ..................................................................................... 24

4.2. Menu structure ......................................................................................... 26

4.3. 'Link statistics' menu ................................................................................ 27

4.4. 'Port statistics' menu ................................................................................. 28

4.5. 'Event counters' command........................................................................ 30

4.6. 'Loopback' menu ...................................................................................... 31

'Ports loop' menu ............................................................................. 32

'Tributaries loop' menu .................................................................... 32

4.7. 'Test' menu ................................................................................................ 33

4.8. 'Configure' menu ...................................................................................... 34

'Ports usage...' menu ........................................................................ 35

'E2 sensitivity' command ................................................................. 35

'SNMP' menu .................................................................................. 36

'Sensor input' command................................................................... 37

'Factory settings' command ............................................................. 37

4.9. 'Login to remote FMUX' command .......................................................... 38

4.10. 'Reset' command..................................................................................... 38

Section 5. Management via SNMP ................................... 39

5.1. SNMP parameter settings ......................................................................... 39

5.2. Management information blocks (MIBs) ................................................. 40

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Safety precautions

!An exclamation point enclosed in a triangle warns the user about important

operations and maintenance instructions for the device.

It is mandatory to observe the existing safety rules during installation, operations, and

technical maintenance of the device. Installation, technical maintenance, and repair op-

erations must be performed only by qualified and certified personnel. Installation, tech-

nical maintenance, and repair operations must not be performed by the operator or the

user.

Cronyx reserves the right to make changes to technical characteristics and design of the

device without the prior notification of customers.

Multiplexer equipment «FMUX» manufactured by «Cronyx» in compliance with

Technical Specifications 150.RUS ÒÓ is compliant with the following requirements:

• «Technical Requirements to secondary time trunking equipment for 2/8 Mbit/s digital

transmission systems» approved by the Ministry of Information Technologies and

Communications of the Russian Federation, January 17, 1997;

• «Technical Requirements to tertiary time trunking equipment for 2/34 Mbit/s digital

transmission systems» approved by the Ministry of Information Technologies and

Communications of the Russian Federation, January 17, 1997.

Multiplexer equipment «FMUX» has the following application conditions: in public

network as secondary and tertiary time trunking equipment of plesiochronous digital

hierarchy.

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Section 1. Introduction

1.1. Application

The FMUX/S-4E1-E2 is a 4 channel multiplexer, allowing to transmit up to four E1

channels over a E2 link.

Each of the E1 channels is transmitted independently. The synchronization frequency of

each link is non dependent on the synchronization frequencies of the other links.

The picture shows the diagrams of the item's use:

E2 Link (up to 400 m)

Console

E1 Ports

...

FMUX

...

FMUX

E1 Ports

Hereinafter the 'E1' term is used to denote a data transmission channel with an interface

complying with the ITU-T G.703 standard for transmitting data with a rated bit rate of

2,048 kbit/s in both framed mode in accordance with the ITU-T G.704 (or PCM-30)

standard, and unframed mode.

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1.2. FMUX/4 family overview

Main characteristics of the FMUX/4 family multiplexers:

• transmission of up to 4 E1 channels over a fiber optic link (or over a E2 link);

• single-mode or multi-mode fiber;

• up to 170 km distance;

• capability to operate over a single fiber;

• availability of models with a Ethernet (10/100Base-T) digital port or a universal

port (V.35/RS-530/RS-232/X.21);

• Ethernet virtual local area network (VLAN) support;

• compliance with ITU-T G.703, G.704, G.742, G.751, G.823, G.955, O.151, and

IEEE 802.3 standards;

• local and remote loops;

• built-in error rate meter (BER tester);

• RS-232 console port;

• remote management over SNMP via a dedicated Ethernet (10Base-T) port;

• emergency alarms ('dry relay contacts');

• compact design (1U) for rack-mounting;

• built-in power supply unit for mains or battery supply.

The device may be managed via the RS-232 interface using an ASCII terminal (console),

or via Ethernet using the SNMP protocol.

The indicators on the front panel of the multiplexer show link availability, serviceability

of the link transceiver, loop switched-on states, and testing modes.

The built-in BER tester allows measuring error rate in the link. The measurements are

performed using fixed or pseudo-random code according to the O.151 standard (the pat-

tern length is 223-1=8,388,607 bits).

Remote login from the local device to the remote one is provided to allow remote control,

when there are no personnel on the remote side of the link. Commands are transmitted to

the remote deice via an additional service channel.

The device is equipped with an emergency alarm relay, the 'dry' contacts of which may

switch on an external device to call the operations personnel (according to G.742 and

G.751).

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The multiplexer has the capability of firmware upgrade. The instructions for upgrading

the firmware may be found at the www.cronyx.ru website.

1.3. Ordering information

The FMUX/S-4E1-E2 device may be ordered with two power options as follows:

1. FMUX/S-4E1-E2/BNC-SNMP-AC (176-264 VAC, 50 Hz)

2. FMUX/S-4E1-E2/BNC-SNMP-DC (36-72 VDCx)

1.4. Technical specifications

E1 interface

Nominal bit rate.............................................. 2048 kbit/s

Connector....................................................... RJ-48 (female, 8-pin)

Coding ............................................................ HDB3

Frame structure .............................................. transparent G.703 stream transmission in

both framed (G.704, PCM-30), and

unframed mode

Error detection ............................................... bipolar violation

Link impedance .............................................. 120 Ohms, symmetrical (twisted pair)

Receiver signal level ...................................... 0 to -36 dB

Phase jitter suppression .................................. in the receiving path

Overvoltage protection ................................... TVS

Overcurrent protection ................................... Fuse

E2 interface

Connectors ..................................................... BNC

Coding ............................................................ HDB3

Error detection ............................................... bipolar violation

Link impedance .............................................. 75 Ohms unbalanced (coaxial)

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Receiver signal level ...................................... 0 to -2.8 dB, or

2.6 to -5.6 dB, or

3.6 to -6.8 dB,

set from the console

Permitted cable length .................................... 0 to 170 m, or

150 to 350 m, or

200 to 400 m

(for the ATT734A cable),

set from the console

Overvoltage protection................................... TVS

Overcurrent protection ................................... Fuse

Emergency alarm interface

Connector type ............................................... DB-9 (female)

Relay contact type ......................................... Up to 600 mA

Relay contact voltage ..................................... Up to 110 VDC or 125 VAC

Console port

Interface type, ................................................ RS-232 DCE connector, DB-9 (female)

Data transfer protocol .................................... Asynchronous, 9,600 bit/s,

8 bits/character, 1 stop bit, no parity

Modem signals................................................ DTR, DSR, CTS, RTS, CD

SNMP management port

Interface type ................................................. Ethernet 10Base-T

Connector....................................................... RJ-45

Diagnostic modes

Loops ............................................................. Local, remote

Error rate control............................................ Built-in

Management................................................... over the RS-232 management port,

over SNMP (for '-SNMP' models), or

from a remote device

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Dimensions and weight

Design ............................................................ 1U for a 19” rack

Size ................................................................. 444 mm x 262 mm x 44 mm

Weight ............................................................ 3.4 kg

Electric power supply

AC power source............................................ 176–264 VAC, 50 Hz

DC power source............................................ 36–72 VDC

Power consumption ........................................ No more that 12.5 W

Operating conditions

Temperature ................................................... 0 to 50 °C

Relative humidity ........................................... Up to 80 %, without condensation

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Section 2. Installation

2.1. Site requirements

The multiplexer unit should be grounded before switching on, there is a ground terminal

screw on the front panel provided for this purpose.

When installing the multiplexer, allow for at least 10 cm of free space next to the front

panel for interface cable connections.

The ambient temperature must be 0 to +50 °Ñ at 80% humidity, no condensation.

2.2. Delivered items

Delivered items include:

• the FMUX unit of a corresponding design – 1 piece;

• bracket for mounting the FMUX unit in a 19” rack – 2 pcs.;

• self-adhesive stand for the FMUX unit – 4 pcs.;

• AC power cord (for the '-AC' model) – 1 piece;

• removable part of the power supply connector terminal unit

(for the '-DC model') – 1 piece;

• user's guide – 1 piece.

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2.3. Cable connections

The front panel of the multiplexer contains connectors as follows: E2 link (TX and RX),

the E1 ports, the SNMP Ethernet 10Base-T port, the console, the emergency alarm and

the power supply.

Emergency alarm

ConsoleE1 ports

Power

Grounding

RXTX

SNMP

Power supply connector

A standard mains connector (IEC 320 C14) is used to connect the AC power cord (for the

'-AC' model). The power cord is supplied with the device.

To connect the DC power supply cable (for the '-DC' model), the power supply connector

is used, shown below (view from multiplexer's front panel side):

+ 48 VDC- 48 VDC

Connected to body

The corresponding removable part of the power supply connector is supplied with the

device.

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Ground terminal

There is a M4 screw on the front panel for device grounding.

!Before switching the device on, and before connecting other cables, the

multiplexer unit must be properly grounded.

E2 link TX and RX connectors

Standard BNC connectors are used for connecting E2 link. Be careful to connect the

receiving cable to the RX connector, and the transmitting cable to the TX connector. Do

not allow cable bending at sharp angles.

E1 port connectors

An RJ-48 connector is used for E1 port connections:

1 - output A

2 - output B

3 - not used

4 - input A

5 - input B

6 - not used

7 - not used

8 - not used

1 8

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SNMP port connector

An RJ-45 female socket is used for the connection of the Ethernet port (10Base-T, IEEE

802.3 standard) for management via the SNMP protocol:

1 - TX +

2 - TX -

3 - RX +

4 - not used

5 - not used

6 - RX -

7 - not used

8 - not used

1 8

Use direct cable for connection to the hub.

Console port connector

A DB-9 (female) connector is used for console connection. The console port has a stan-

dard RS-232 DCE interface, and utilizes the following settings: asynchronous mode,

9,600 baud speed, 8 bits per character, 1 stop bit, no parity. Use a direct cable for connec-

tion to a PC COM port.

!An RTS signal from the managing terminal to the device console port must

be provided when connecting the console.

It is recommended to use the following cable diagrams:

FMUXconsole

(DB-9 female)

Management

terminal

Cable without modem control

GND 5

TXD 3

RXD 2

RTS 7

CTS 8

DTR 4

CD 1

GND

TXD

RXD

RTS

CTS

DTR

DSR

FMUXconsole

(DB-9 female)

Management

terminal

Cable with modem control

GND 5

TXD 3

RXD 2

RTS 7

CTS 8

DTR 4

DSR 6

CD 1

GND

TXD

RXD

RTS

CTS

DTR

DSR

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Emergency alarm connector

A DB-9 (female) connector is used for emergency alarm connection:

3 - input contact

4 - closed to the middle

contact (9) during

normal operation,

open on error

5 - open during normal

operation, closed to the

middle contact (9) on error

7 - common wire (GND)

8 - common wire (GND)

9 - middle contact

Emergency alarm relay,

no alarm state is shown

External input sensor (user-supplied

equipment); the “Alarm on closed”

configuration is shown

5 4 3 2 1

8 79 6

+5 В

The external input sensor (contacts 3 and 7) must be isolated from other electrical cir-

cuits.

Contacts 1, 2, and 6 are reserved and should not be used.

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Section 3. Operations

3.1. Indicators

The front panel contains indicators, showing the status of the device. The list of indicators

and their functions are specified in the table below. Reference number on the figure

correspond to numbers in the table.

LERR LOS

RERR LOW

TST

PWR

0 1 2 3 SNMP

7 8 10

1 2 43

CONSOLE ALARM

TX RX

5 6

No. Indicator State Description

1 LERR Red Errors on the link:

• lights or flashes during a high error rate in the

link input signal;

• lights when receiving a test pattern from the

link with loop enabled on the link;

• lights or flashes when there are BER tester

errors in the link test mode (the TST indicator

lights).

2 LOS Red Lights at the link receiver carrier loss.

3 PORT LOS Red E1 port errors:

• flashes during HDB3 coding errors in the corre-

sponding E1 port;

• lights during loss of carrier in the corresponding

E1 port;

• lights when receiving the AIS signal at the input

of the corresponding E1 port.

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4 PORT STATE Green E1 operating mode:

• lights - normal operation;

• does not light - port is not used;

• flashes - loop enabled on the port;

• double flashes - tributary loop enabled on the

port.

5 SNMP EACT Green Ethernet data transmission in progress.

6 SNMP ELINK Green Ethernet cable connected.

7 PWR Green Device power present.

8 TST Red Test modes:

• flashes when the bit error rate tester is enabled

towards the link;

• flashes when the loop is enabled on the link;

• double flashes when remote loop is enabled.

9 RERR Red Errors in the remote device (when the link trans-

ceiver carrier is present):

• loss of the link receiver carrier at the remote

end;

• link synchronization loss at the remote end.

10 LOW Red Not used.

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3.2. Emergency alarms

The multiplexer is equipped with an emergency alarm interface.

The emergency alarm interface is designed for switching on an external executive device

(bell, buzzer, or console indicator) during an abnormal situation. It is switched on by 'dry'

(that is, not connected to any multiplexer electrical circuits) relay contacts.

Contact 9 is closed to contact 4 during normal operating mode. In the 'alarm' state contact

9 disconnects from contact 4, and closes with contact 5 (see the 'Emergency alarm con-

nector' connection diagram in the 'Cable connections' section).

The relay switches to the 'alarm' state in the following situations:

• power failure;

• no signal or loss of frame synchronisation on the link;

• for links in the 'In use' state: no signal in one of the E1 ports;

• a signal from en external input sensor on the remote device is received – contact 3 on

the emergency alarm connector of the remote device is closed to contact 7 (or open,

of the on open mode is set in the configuration menu – 'Sensor input: Alarm on open').

If the multiplexer is installed in an unserviced room, then the external input sensor

contacts may be used, for example, for transmitting climate sensor signal, door open-

ing signals, etc.

!The external input sensor contacts must be closed by an actuator, which is

isolated from electrical circuits! Non compliance with this requirement may

lead to multiplexer malfunction.

The external sensor has two operating modes: closing-sensitive and opening-sensitive.

By default the on close mode is set – when contact 3 closes to 7, the remote device

switches to the alarm state.

It is possible to set the on open mode from the console (see the description of the 'Sensor

input' command in the “'Configure' menu” section), in this case the sensor must be nor-

mally closed, and when it opens, the 'alarm' state is set on the remote device.

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3.3. Device responses to emergencies

Local device Remote device

Condition Indicators

and relay

AIS Outp ut

to E1 Ports

Indicators

and Relay

AIS O ut p ut

to E1 Ports

Power failure All indicators: Off

Relay: Alarm

LOS: On

Relay: Alarm To all ports

Loss of input signal from

link

LOS: On

Relay: Alarm To all ports RERR: On

High link input signal error

rate

LERR: On

Relay: Alarm To all ports RERR: On

E1 port N configured as

«Unused»

PORT N STATE: Off

Loss of E1 port N input

signal (port is «In use»)

PORT N LOS: On

Relay: Alarm To port N

Loss of E1 port N input

signal (port is «Unused») PORT N STATE: Off To port N

AIS is being received at the

E1 port N To port N

Local link loopback is

enabled TST: flashes To all ports

Remote link loopback is

enabled

TST: flashing by

double flashes TST: flashes To all ports

E1 port N loopback is

enabled

PORT N STATE:

flashes To port N

E1 port N tributary

loopback is enabled

PORT N STATE:

flashing by double

flashes

To port N

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3.4. Loops

Normal mode

Local multiplexer:

normal operation

Remote multiplexer:

normal operation

In the normal mode, the indicators must be in the following states:

Indicator Color Normal state

PWR Green On

TST Red Off

LOS Red Off

LOW Red Off (not used)

LERR Red Off

RERR Red Off

PORT LOS Red Off

PORT STATE Green On, when the port is in use

SNMP ELINK Green On, when the Ethernet cable is connected

to the SNMP port

SNMP EACT Green Flashes when Ethernet data transmission is in progress

over the SNMP port

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Port loop

Local multiplexer,

loop enabled on port 0,

the PORT STATE indicator of port 0 flashes

Remote multiplexer

AIS

Tributary loop

Local multiplexer,

tributary loop enabled on port 0,

the PORT STATE indicator of port 0 flashes

Remote multiplexer

AIS

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