Cronyx FMUX/S-4E1-E2 User manual

Copyright © 2007 Cronyx
Multiplexer
FMUX/S-4E1-E2
4 E1 Channels
E2 Link
Installation and Operation Manual
Document Version: 1.0E / 14.12.2007

FMUX/S-4E1-E2 Multiplexer
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Copyright © 2007 Cronyx
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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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Copyright © 2007 Cronyx 3
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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Copyright © 2007 Cronyx
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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.

FMUX/S-4E1-E2 Multiplexer
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Copyright © 2007 Cronyx 5
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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Copyright © 2007 Cronyx
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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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Copyright © 2007 Cronyx 7
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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Copyright © 2007 Cronyx
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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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Copyright © 2007 Cronyx 9
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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Copyright © 2007 Cronyx
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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.