Meinberg IMS-ESI User manual

MANUAL
IMS-ESI Setup Guide
Hot-Plug Module
April 1, 2022
Meinberg Funkuhren GmbH & Co. KG

Table of Contents
1 Imprint 1
2 Important Safety Information 2
2.1 ProductDocumentation ........................................... 2
2.2 PreventionofESDDamage......................................... 3
2.3 PowerSupply................................................. 4
2.4 Cabling..................................................... 4
3 Replacement or Installation of a Hot-pluggable IMS Module 5
3.1 Important Information Regarding Hot-Pluggable IMS Modules . . . . . . . . . . . . . . . . . . . . 6
4 ESI - Telecom Synchronisation References 7
4.1 IMS-ESI (Extended Synchronization Interface) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Date: April 1, 2022 IMS-ESI Setup Guide

1 Imprint
1 Imprint
Meinberg Funkuhren GmbH & Co. KG
Lange Wand 9, 31812 Bad Pyrmont, Germany
Phone: + 49 (0) 52 81 / 93 09 - 0
Fax: + 49 (0) 52 81 / 93 09 - 230
Website: https://www.meinbergglobal.com
Email: [email protected]
Date: April 1, 2022
IMS-ESI Setup Guide Date: April 1, 2022 1

2 Important Safety Information
Please ensure that IMS modules designed for "hot-plugging" (modules that are removable and insertable while
a system is in operation) are always handled with the utmost care.
Before performing any maintenance work on the system:
•We recommend making a backup of any stored configurations (e.g. using a USB flash drive or from the
Web UI)
•Take note of the chapter "Prevention of ESD Damage".
•Take note of the chapter "Power Supply".
2.1 Product Documentation
Detailed product documentation is provided on a USB flash drive delivered with the Meinbeg system. The
manuals can also be downloaded from the Meinberg website at https://www.meinbergglobal.com, where you can
enter your system name into the search box at the top of the page to find the relevant manual. Alternatively,
contact Meinberg Support for further assistance.
The "Docs & Support" menu on the Web Interface also provides user manuals for time server administrators.
This manual contains important safety instructions for the installation and operation of the
device. Please read this manual thoroughly before using the device.
This device may only be used for the purpose described in this manual. In particular, the
specified operating limits of the device must be heeded. The person setting up the device is
responsible for safety matters in relation to any larger system in which the device is
installed!
Failure to observe these instructions may have an adverse impact on device safety!
Please keep this manual in a safe place.
Target audience
This manual is only intended to be used by qualified electricians, or by persons who have been appropri-
ately instructed by a qualified electrician and who are familiar with applicable national standards and with
safety rules & regulations. This device may only be installed, set up, and operated by qualified personnel.
2 Date: April 1, 2022 IMS-ESI Setup Guide

2 Important Safety Information
2.2 Prevention of ESD Damage
ATTENTION!
An ESDS device (electrostatic discharge-sensitive device) is any device at risk of damage or
malfunction due to electrostatic discharges (ESD) and thus requires special measures to prevent
such damage or malfunction. Systems and modules with ESDS devices usually bear the following
symbol:
Symbol Indicating Devices with ESDS Components
The following measures will help to protect ESDS components from damage and malfunction.
When preparing to dismantle or install devices:
Ground your body (for example, by touching a grounded object) before touching sensitive devices.
Ensure that you wear a grounding strap on your wrist when handling such devices. These straps must
in turn be attached to an uncoated, non-conductive metal part of the system.
Use only tools and devices that are free of static electricity.
When transporting devices:
Devices must only be touched or held by the edges. Never touch any pins or conductors on the device.
When dismantling or installing devices:
Avoid coming into contact with persons who are not grounded. Such contact may compromise your
connection with the earth conductor and thus also compromise the device’s protection from any
static charges you may be carrying.
When storing devices:
Always store devices in ESD-proof ("antistatic") bags. These bags must not be damaged in any way.
ESD-proof bags that are crumpled or have holes cannot provide effective protection against
electrostatic discharges.
ESD-proof bags must have a sufficient electrical resistance and must not be made of conductive
metals if the device has a lithium battery fitted on it.
IMS-ESI Setup Guide Date: April 1, 2022 3

2.3 Power Supply
WARNING!
The IMS system in which the module is used is operated at a dangerous voltage. Please refer to your IMS
Manual for more information about safety.
When removing a hot-pluggable power supply unit, always disconnect its power cable before removing it from
the IMS system.
Never open a power supply unit—there may still be hazardous residual voltages present even after disconnec-
tion from the mains supply. In the event that a power supply unit is no longer working (e.g. defective), please
return it to Meinberg for repair.
Failure to observe these safety instructions may result in serious injury and/or property damage. The IMS
system must only be installed, set up, and operated by qualified personnel.
2.4 Cabling
WARNING!
Danger of death from electric shock! Never work on the system while the power is live! Always disconnect the
cables from the devices at both ends before working on the plugs and terminals of connected cables!
4 Date: April 1, 2022 IMS-ESI Setup Guide

3 Replacement or Installation of a Hot-pluggable IMS Module
3 Replacement or Installation of a Hot-pluggable
IMS Module
If the system is supplied with an antenna and antenna cable, it is advisable to first mount the antenna in a
suitable location (see chapter Antenna Mounting) and lay the antenna cable.
Please use a Torx screwdriver (T8 x 60) for removal and installation of the module.
1. Follow the safety instructions at the beginning
of this manual!
2. Remove the two marked Torx screws from the
module holder plate or the cover plate of
the empty slot.
3. Note when removing!
Pull the module carefully out of the guide
rail. Note that the module is firmly anchored
in the connector block of the housing. You need
a certain amount of force to release the module
from this link. Once the connection to the
connector block of the system’s backplane is
loosened, the module can be easily pulled out.
4. Note during installation!
Please ensure that the module is correctly inserted into the two guide rails of the system housing
as otherwise damage to the module and the housing could be caused. Make sure that the module is
securely locked into the connector block before you fasten the two screws.
5. Now you can put the installed module into operation.
Attachment points of an 1U IMS system
IMS-ESI Setup Guide Date: April 1, 2022 5

3.1 Important Information Regarding Hot-Pluggable IMS Modules
The following information should be strictly observed when replacing IMS modules during operation. Not all
IMS modules are fully hot-pluggable. For example, it is naturally not possible to replace a power supply unit in
a system without PSU redundancy without first having installed a second power supply unit while the system
is in operation.
The following rules apply for the individual IMS slots:
PWR Slot: "Hot-Swappable" If you operate your system with only one power supply unit,
a second power supply unit must be installed before removing
or replacing it in order to keep your system on.
I/O, ESI and
MRI Slots: "Hot-Pluggable".
CLK1/CLK2 "Hot-Pluggable" When a clock module is replaced or installed, it is important to rescan
Slots: the reference clocks ("Rescan Refclocks") in the "System" menu
of the Web Interface.
RSC/SPT Slots: "Hot-Pluggable" It will not be possible for your IMS system to switch between signal
generators while the RSC/SPT is not installed.
——————————————————————————————————————————————
CPU Slot: "Not Hot-Pluggable" Before the CPU is removed, the IMS system must be powered down.
Please note that after powering on and rebooting the LANTIME
Operating System, the configuration of some IMS modules may be reset
to factory defaults!
The NTP service and access to the web interface will be unavailable while the CPU
is not installed. Management and monitoring functions will also be disabled.
6 Date: April 1, 2022 IMS-ESI Setup Guide

4 ESI - Telecom Synchronisation References
4 ESI - Telecom Synchronisation References
Enhanced Synchronisation Inputs
Reference Inputs: PPS and variable frequencies unframed, 1 kHz - 20 MHz
2,048 Mbit/s / 1,544 Mbit/s - E1/T1 framed
Input 1 1PPS (BNC female connector)
TTL, pulse duration ≥5µs, active high
Input 2 1 kHz - 20 MHz (BNC female connector)
sine (400 mVpp -5Vpp) or TTL
Input 3 1 kHz - 20 MHz (RJ-45)
400 mVpp -5Vpp into 120 Ω, TTL
Input 4 E1 or T1 framed G.703 (RJ-45)
max. attenuation -12 dB (referred to the signal level)
into 120 Ω
Power Requirements: 5 V, +-5%, 250 mA
Status Indicators
LED St: ESI status
LED In: Status of the backplane’s reference signals
LED A Status of the input signals (1 & 2) at the board
LED B: Status of the input signals (1 & 2) at the board
Operation conditions:
Initialisation: LED St blue until configuration is done
LED In off until configuration is done
LED A off until configuration is done
LED B off until configuration is done
expiration LEDs: ALL LEDs 0,5 sec. red →0,5 sec. yellow →
0,5 sec. green →0,5 sec. off
Normal Operation: LED St green
LED In green
LED A green, if PPS and Frequency
flashing green, if only Frequency
flashing yellow, if only PPS
off, if no signal
LED B green, if Clock and Framed available
flashing green, if only Clock available
flashing yellow, if only Framed available
off, if no signal
ESI
A B
12 3 4
IMS-ESI Setup Guide Date: April 1, 2022 7

Pin assignment of the RJ-45 jacks (input 3 + 4)
8 Date: April 1, 2022 IMS-ESI Setup Guide

4 ESI - Telecom Synchronisation References
4.1 IMS-ESI (Extended Synchronization Interface)
The ESI (External Synchronization Input) card is capable of adding additional synchronization sources to an
IMS system. It accepts E1 or T1 signals, both as framed signals (2.048MBit/s/1.544MBit/s, supporting SS-
M/BOC) or clock inputs.
The clock inputs are configurable (1 kHz - 20 MHz). Furthermore a 1PPS input is provided as well.
An ESI card is, as the MRI card, dedicated to one specific clock module (depending on the slot it is in-
stalled in) and can be installed in both ESI as well as MRI slots.
Extended reference input signals
- 1PPS, BNC
- var. frequencies (1 kHz - 20 MHz) unframed, BNC
- var. frequencies (1 kHz - 20 MHz) unframed, RJ45
- BITS E1/T1 framed, RJ45
Hint:
If the specified frequency range is exceeded, an error message is displayed in the web interface and the entered
value is not accepted in this case.
IMS-ESI Setup Guide Date: April 1, 2022 9

Input 1: The input 1 is dedicated to 1PPS pulse synchronization.
Signal Type – PPS in
ITU Quality Settings
(settings can be made individually for inputs 1 to 4)
ITU Mask.
Predefined masks can be selected, in which quality requirements regarding jitter and wander of the input signals
are defined. If the default values are exceeded, the affected input port is switched off.
Hysteresis.
To avoid that signal inputs are continuously switched off and back on when exceeding the ITU mask, a hysteresis
for switching on again can be defined. The signal input port is only reactivated when all the selected mask
points are below the defined percentage value’s limits.
Discard input signal if selected ITU mask violated.
Only if this box is selected, the input signal is switched off when exceeding an ITU mask.
10 Date: April 1, 2022 IMS-ESI Setup Guide

4 ESI - Telecom Synchronisation References
Input 2: The input 2 accepts as input either 2048/1544 kHz frequency or configurable frequency in range be-
tween 1 kHz and 20 MHz, also 1.544kHz if required.
Type: Frequency input
Frequency: 1 kHz - 20 MHz of input signal, 10 MHz is set as default.
Maximum Slip: A discontinuity of an integer number of cycles in the measured carrier phase resulting from
a remporary loss of input signal. The maximum slip number can be selected in range between
0.5 – 3 cycles, with 1.5 as a default value.
Input 3:
See Input 2, but with RJ45 Connector and as default Frequency input 2048 kHz.
IMS-ESI Setup Guide Date: April 1, 2022 11

Input 4: As fixed frequency you can choose between E1 framed and T1 framed.
Type: BITS in.
Fixed Frequency: E1 framed (2.048 MHz), T1 framed (1.544 MHz).
Quality: Synchronization Status Messages (SSM), Bit-Oriented Code (BOC).
Sa Bits Group: Location of transmitted SSM/BOC
Quality Maximum SSM / Maximum BOC (quality levels for T1 framed signal)
Synchronization Status Message (SSM) in accordance with ITU G.704-1998 standard includes 4 bit long SSM
quality messages received via incoming E1 framed signal. The lower is the bit sequence the higher is quality
of the source clock. The clock source quality levels according to G.704-1998 are as follows:
0000 QL-STU/UKN: Quality unknown
0001 QL-PRS: Primary Reference Source
0010 QL-PRC: Primary Reference Clock
0011 QL-INV3: not used
0100 QL-SSU-A/TNC: Synchronization Supply Unit A or Transit Node Clock
0101 QL-INV5: not used
0110 QL-INV6: not used
0111 QL-ST2: Stratum 2 Clock
1000 QL-SSU-B: Synchronization Supply Unit B
1001 QL-INV9: not used
1010 QL-EEC2/ST3: Ethernet Equipment Clock 2
1011 QL-EEC1/SEC: Ethernet Equipment Clock 1 / SDH Equipment Clock
1100 QL-SMC: SONET Minimum Clock
1101 QL-ST3E: Stratum 3E Clock
1110 QL-PROV: Provisionable by the Network Operator
1111 QL-DNU/DUS: Do not use for synchronization
12 Date: April 1, 2022 IMS-ESI Setup Guide

4 ESI - Telecom Synchronisation References
With the Quality Selection box, you can select the Minimum SSM level of the incoming signal that is still
acceptable as input signal. If clock reports a lower quality level than the configured minimum SSM level the
system will not use it for synchronization.
Example:
User configured QL-SSU-B as Minimum QL for his system. An E1 input signal reporting either QL-SSU-A or
QL-PRC will be allowed for synchronization, whereas a signal with quality level QL-EEC1/SEC will not be
accepted.
Sa Bits Group
Here you can select between the Sa4 to Sa8 bit group to choose the location for SSM quality bits.
IMS-ESI Setup Guide Date: April 1, 2022 13