hopf Elektronik GmbH 7271 User manual

_____________________________________________________________
Technical Manual
NTP/SINEC H1 LAN Board
Model 7271 and 7272
incl. Additional Technical Manual
"NTP Output with adjustable Time Base"
ENGLISH
Version: 06.00 - 20.12.2010
_____________________________________________________________
Valid for Devices 7271 and 7272 with SET
Version: 06.xx
IMAGE
Version: 06.xx
and FIRMWARE
Version: 06.xx
Industriefunkuhren

2 / 100 7271 and 7272 NTP/SINEC H1 LAN Board - V06.00
hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: in[email protected]

INPORTANT NOTES
7271 and 7272 NTP/SINEC H1 LAN Board - V06.00 3 / 100
hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: in[email protected]
Version Numbers (Firmware / Description)
THE TERM SET DEFINES THE FIXED RELATIONSHIP BETWEEN THE IMAGE VERSION
AND THE ASSOCIATED H8 FIRMWARE VERSION.
THE FIRST TWO DIGITS OF THE TECHNICAL DESCRIPTION VERSION NUMBER,THE
SET VERSION AND THE IMAGE VERSION MUST BE THE SAME!THEY DESIGNATE
THE SHARED FUNCTIONAL IDENTITY BETWEEN DEVICE,SOFTWARE AND TECHNICAL
DESCRIPTION.
THE VERSION NUMBER OF THE IMAGE AND THE H8 SOFTWARE CAN BE READ IN THE
WEBGUI OF BOARD 7271/7272 (SEE CHAPTER 8.3.5.1 Device Information AND
CHAPTER 8.3.5.2 Hardware Information).
THE TWO DIGITS AFTER THE DOT IN THE VERSION NUMBER DESIGNATE
CORRECTIONS TO THE FIRMWARE AND/OR DESCRIPTION WHICH HAVE NO EFFECT
ON FUNCTIONALITY.
Downloading Technical Manuals
All current manuals of our products are available free of charge via our homepage on the
Internet.
Homepage: http://www.hopf.com
E-mail: [email protected]om
Symbols and Characters
Operational Reliability
Disregard may cause damages to persons or material.
Functionality
Disregard may impact function of system/device.
Information
Notes and Information.

SERVICE RELIABILITY
4 / 100 7271 and 7272 NTP/SINEC H1 LAN Board - V06.00
hopf Elektronik GmbH
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Safety regulations
The safety regulations and observance of the technical data serve to
ensure trouble-free operation of the device and protection of persons and
material. It is therefore of utmost importance to observe and compliance
with these regulations.
If these are not complied with, then no claims may be made under the
terms of the warranty. No liability will be assumed for any ensuing
damage.
Safety of the device
This device has been manufactured in accordance with the latest
technological standards and approved safety regulations
The device should only be put into operation by trained and qualified staff.
Care must be taken that all cable connections are laid and fixed in
position correctly. The device should only be operated with the voltage
supply indicated on the identification label.
The device should only be operated by qualified staff or employees who
have received specific instruction.
If a device must be opened for repair, this should only be carried out by
employees with appropriate qualifications or by hopf Elektronik GmbH.
Before a device is opened or a fuse is changed all power supplies must
be disconnected.
If there are reasons to believe that the operational safety can no longer be
guaranteed the device must be taken out of service and labelled
accordingly.
The safety may be impaired when the device does not operate properly or
if it is obviously damaged.
CE-Conformity
This device fulfils the requirements of the EU directive
89/336/EWG "Electromagnetic compatibility" and 73/23/EWG "Low
voltage equipment".
Therefore the device bears the CE identification marking
(CE = Communautés Européennes = European communities)
The CE indicates to the controlling bodies that the product complies with the requirements of
the EU directive - especially with regard to protection of health and safety for the operator
and the user - and may be released for sale within the common markets.

TABLE OF CONTENTS
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Contents Page
1General..........................................................................................................................9
2Board 7271/7272 Basic Functions .............................................................................10
3Board 7271 Construction ...........................................................................................12
3.1 Board 7271 Front Panel ..........................................................................................12
3.1.1 Status LEDs of the Board 7271 ......................................................................................... 13
3.1.2 RJ45 Socket (ETH0).......................................................................................................... 14
3.1.3 Reset / Default Button........................................................................................................ 14
3.2 Overview of Board 7271 (3U/4HP) Assembly..........................................................15
3.2.1 DIP Switch DS1.................................................................................................................. 15
3.2.2 MAC Address Labels for ETH0.......................................................................................... 16
3.2.3 Heat Sink............................................................................................................................ 16
4Board 7272 Construction ...........................................................................................17
4.1 Board 7272 Front Panel ..........................................................................................17
4.1.1 Status LEDs of the Board 7272 ......................................................................................... 18
4.1.2 RJ45 Socket (ETH0 / ETH1).............................................................................................. 19
4.1.3 Reset / Default Button........................................................................................................ 19
4.2 Overview of Board 7272 (3U/4HP) Assembly..........................................................20
4.2.1 DIP Switch DS1.................................................................................................................. 20
4.2.2 MAC Address for ETH0 / ETH1......................................................................................... 21
4.2.3 Heat Sink............................................................................................................................ 21
5Board 7271/7272 System Performance .....................................................................22
5.1 Delayed Readiness for Operation after Switch-on / Reset.......................................22
5.2 Reset / Default Button .............................................................................................22
5.2.1 Board Reset....................................................................................................................... 23
5.2.2 Place LAN Parameters in Default Status........................................................................... 24
6Implementing Board 7271/7272 in a hopf Base System..........................................25
6.1 Select the hopf Base System 68xx or 7001............................................................25
6.2 Setting the System Board Number ..........................................................................26
6.2.1 Setting the Board Number for Base System 7001............................................................. 26
6.2.2 Setting the Board Number for Base System 68xx ............................................................. 27
6.3 Creating the Network Connection............................................................................27

TABLE OF CONTENTS
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hopf Elektronik GmbH
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7Network Configuration for ETH0 via the Base System.............................................28
7.1 Input Functions of Base Systems 6842, 6850 and 6855..........................................30
7.1.1 Inputting the Static IPv4 Address / DHCP Mode ............................................................... 30
7.1.2 Inputting the Gateway Address.......................................................................................... 31
7.1.3 Inputting the Network Mask ............................................................................................... 31
7.1.4 Inputting the Control Byte .................................................................................................. 32
7.1.4.1 Bit 7-1 - No function at present................................................................................................... 32
7.1.4.2 Bit 0 - Restoring Factory Settings............................................................................................... 32
7.2 Base System 7001 Input Functions.........................................................................33
7.2.1 Inputting the Control Byte .................................................................................................. 33
7.2.1.1 Bit 7-1 - No Function at Present.................................................................................................. 33
7.2.1.2 Bit 0 - Restoring Factory Settings............................................................................................... 34
7.2.2 Inputting the Static IPv4 Address / DHCP Mode ............................................................... 34
7.2.3 Inputting the Network Mask ............................................................................................... 35
7.2.4 Inputting the Gateway Address.......................................................................................... 35
8HTTP/HTTPS WebGUI –Web Browser Configuration Interface...............................36
8.1 Quick Configuration.................................................................................................36
8.1.1 Requirements..................................................................................................................... 36
8.1.2Configuration Steps............................................................................................................ 36
8.2 General –Introduction.............................................................................................37
8.2.1 LOGIN and LOGOUT as a User ........................................................................................ 38
8.2.2 Navigation via the Web Interface....................................................................................... 39
8.2.3 Inputting or Changing Data................................................................................................ 40
8.2.4 Plausibility Check during Input........................................................................................... 41
8.3 Description of the Tabs............................................................................................42
8.3.1 GENERAL Tab................................................................................................................... 42
8.3.2 NETWORK Tab.................................................................................................................. 43
8.3.2.1 Host/Nameservice ...................................................................................................................... 44
8.3.2.1.1 Hostname 44
8.3.2.1.2 Default Gateway 44
8.3.2.1.3 DNS Server 1 & 2 44
8.3.2.2 Network Interface ETH0 / ETH1 ................................................................................................. 45
8.3.2.2.1 Default Hardware Address (MAC) 46
8.3.2.2.2 Customer Hardware Address (MAC) 46
8.3.2.2.3 DHCP 46
8.3.2.2.4 IP Address 46
8.3.2.2.5 Network Mask 47
8.3.2.2.6 Operation Mode 47
8.3.2.3 Option: Network Interface Bonding / Teaming............................................................................ 48
8.3.2.3.1 Basic Configuration 49
8.3.2.3.2 Advanced Configuration Parameters 50
8.3.2.4 Routing ....................................................................................................................................... 52
8.3.2.5 Management-Protocols / SNMP ................................................................................................. 53
8.3.2.6 Time............................................................................................................................................ 54
8.3.2.6.1 Time Protocols 54
8.3.2.6.2 SINEC H1 time datagram 55
8.3.2.6.3 Transmission point of SINEC H1 time datagram 55
8.3.3 NTP Tab............................................................................................................................. 56
8.3.3.1 System Info................................................................................................................................. 57
8.3.3.2 Kernel Info .................................................................................................................................. 58
8.3.3.3 Peers .......................................................................................................................................... 59

TABLE OF CONTENTS
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8.3.3.4 Server Configuration................................................................................................................... 60
8.3.3.4.1 General / Synchronization Source 60
8.3.3.4.2 General / Log NTP Messages to Syslog 61
8.3.3.4.3 Crystal Operation 61
8.3.3.4.4 Broadcast / Broadcast Address 61
8.3.3.4.5 Broadcast / Authentication / Key ID 62
8.3.3.4.6 Additional NTP SERVERS 62
8.3.3.5 Extended NTP Configuration...................................................................................................... 63
8.3.3.5.1 Suppression of unspecified NTP outputs (Block Output when Stratum Unspecified) 63
8.3.3.5.2 NTP Timebase 63
8.3.3.6 Restart NTP................................................................................................................................ 64
8.3.3.7 Access Restrictions / Configuring the NTP Service Restrictions................................................. 65
8.3.3.7.1 NAT or Firewall 66
8.3.3.7.2 Blocking Unauthorised Access 66
8.3.3.7.3 Allow Client Requests 66
8.3.3.7.4 Internal Client Protection / Local Network Threat Level 67
8.3.3.7.5 Addition of Exceptions to Standard Restrictions 67
8.3.3.7.6 Access Control Options 68
8.3.3.8 Symmetric Key and Autokey....................................................................................................... 69
8.3.3.8.1 Why Authentication? 70
8.3.3.8.2 How is Authentication used in the NTP Service? 70
8.3.3.8.3 How is a key created? 70
8.3.3.8.4 How does authentication work? 70
8.3.3.9 Autokey / Public Key Cryptography ............................................................................................ 71
8.3.4 ALARM Tab........................................................................................................................ 72
8.3.4.1 Syslog Configuration................................................................................................................... 72
8.3.4.2 E-mail Configuration ................................................................................................................... 73
8.3.4.3 SNMP Configuration / TRAP Configuration ................................................................................ 74
8.3.4.4 Alarm Messages......................................................................................................................... 75
8.3.5 DEVICE Tab....................................................................................................................... 76
8.3.5.1 Device Information...................................................................................................................... 76
8.3.5.2 Hardware Information ................................................................................................................. 77
8.3.5.3 Restoring the Factory Settings - Factory Defaults ...................................................................... 78
8.3.5.4 Restarting (Rebooting) the Board............................................................................................... 78
8.3.5.5 Image Update & H8 Firmware Update........................................................................................ 79
8.3.5.6 Customized Security Banner ...................................................................................................... 81
8.3.5.7 Option FG7271/PPM: Minute Pulse Length (PPM)..................................................................... 82
8.3.5.8 Product Activation....................................................................................................................... 83
8.3.5.9 Passwords (Master/Device)........................................................................................................ 84
8.3.5.10 Downloading Configurations / SNMP MIB .................................................................................. 84
9SSH and Telnet Basic Configuration.........................................................................85
10 Technical Data ............................................................................................................86
10.1 General ...................................................................................................................86
10.1.1 Design................................................................................................................................ 86
10.1.2 Ambient conditions............................................................................................................. 86
10.1.3 CE compliant...................................................................................................................... 86
10.1.4 NTP Accuracy.................................................................................................................... 86
10.1.5 Time Protocols ................................................................................................................... 87
10.1.6 TCP/IP Network Protocols ................................................................................................. 87
10.1.7 Configuration...................................................................................................................... 87
10.1.8 Features............................................................................................................................. 87
10.2 Special Technical Data of Board 7271.....................................................................88
10.2.1 Board 7271 with Option FG7271/PPM (Output Minute Pulse) .......................................... 88
10.3 Special Technical Data of Board 7272.....................................................................88

TABLE OF CONTENTS
8 / 100 7271 and 7272 NTP/SINEC H1 LAN Board - V06.00
hopf Elektronik GmbH
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11 Factory Defaults..........................................................................................................89
11.1 Network...................................................................................................................89
11.2 NTP.........................................................................................................................90
11.3 ALARM....................................................................................................................90
11.4 DEVICE...................................................................................................................90
12 Glossary and Abbreviations ......................................................................................91
12.1 NTP-specific terminology.........................................................................................91
12.2 Tally Codes (NTP-specific)......................................................................................91
12.2.1 Time-specific expressions.................................................................................................. 92
12.3 Abbreviations...........................................................................................................93
12.4 Definitions ...............................................................................................................94
12.4.1 DHCP (Dynamic Host Configuration Protocol) .................................................................. 94
12.4.2 NTP (Network Time Protocol)............................................................................................ 94
12.4.3 SNMP (Simple Network Management Protocol)................................................................ 95
12.4.4 TCP/IP (Transmission Control Protocol / Internet Protocol) .............................................. 95
12.5 Syslog Messages....................................................................................................96
12.6 Accuracy & NTP Basic Principles............................................................................96
13 List of RFCs.................................................................................................................99
14 List of Open Source Packages used .......................................................................100

GENERAL
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hopf Elektronik GmbH
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1 General
LAN Board 7271/7272 is a Network Time Server (NTS) for hopf GPS and DCF77 System
7001 and Base System 68xx (6842, 6850 and 6855) for 19“ or ½ 19“ (3U) racks and Slim
Line (1U).
Board 7271 is equipped with 10/100 Base-T (auto-sensing) Ethernet interface (ETH0).
Board 7272 is equipped with one or two Ethernet interfaces (ETH0 + ETH1) and can be
used in different Sub-Networks with respectively 10/100/1000 Base-T (autosensing). Both
interfaces allow the configuration of the board 7272.
Board 7271/7272 can be used by networks for highly accurate synchronisation over NTP
(Network Time Protocol),which is available worldwide. The following synchronisations
protocols are available:
NTP
SINEC H1 time data string
Daytime
Time
The network connection of the LAN Board 7271/7272 can be installed at any desired point
on the network.
Depending on the respective system, a number of these LAN Boards can be implemented in
the Base System on a modular basis.
A variety of management and monitoring functions are available (e.g. SNMP traps, E-mail
notification, Syslog messages).
Increased security is freely available via optional encryption methods such as symmetric
keys, Autokey and access restrictions and the disabling of unused protocols.
Extensive parameters are provided to suit the conditions of individual applications by means
of a variety of access / configuration channels.
LAN Board 7271/7272 can be accessed in the network via the hopf Base System
keyboard.
The Board is configured over Ethernet:
oHTTP/HTTPS WebGUI (Graphical User Interface) by means of a web browser
oOr text-based menus over Telnet and SSH
Various protocols (e.g. IPv4, http, https, Telnet etc.) are available for the Ethernet
connection.

BOARD 7271/7272 BASIC FUNCTIONS
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2 Board 7271/7272 Basic Functions
Time Protocols
NTPv4 Server
NTP Broadcast Mode
NTP Multicast Mode
NTP Client for additional NTP Servers (redundancy)
SNTP Server
NTP Symmetric Key Encryption
NTP Autokey Encryption
NTP Access Restrictions
PPS Time Source
RFC-867 DAYTIME Server
RFC-868 TIME Server
SINEC H1 time datagram
Network Protocols
HTTP/ HTTPS
DHCP
Telnet
SSH
SNMP
NTP
SINEC H1 time datagram
Configuration Channel
HTTP/HTTPS WebGUI (browser-based)
Telnet
SSH
External LAN configuration tool
 hopf 7001 system keypad and display
 hopf 68xx system (Slim Line) keypad and display
Ethernet Interface 7271
Auto negotiate
10 Mbps half-/full duplex
100 Mbps half-/full duplex
Additionally at Board 7272
1000 Mbps half-/full duplex

BOARD 7271/7272 BASIC FUNCTIONS
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Features
HTTP/HTTPS (status, control)
SNMPv2c, SNMP Traps (MIB-II, Private Enterprise MIB)
E-mail Notification
Syslog Messages to external Syslog Server
PPSKIT
Update over TCP/IP
Fail-safe
Watchdog Circuit
Power Management
System Management
Customized Security Banner
Internal to the Board
An embedded Linux is responsible for the correct operation of the Board. The following Linux
operating system version is in use:
Linux hopf727x 2.4.33.2-NANO (Linux Kernel 2.4.33.2 with Nano Kernel extension).

BOARD 7271 CONSTRUCTION
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3 Board 7271 Construction
This Chapter describes the hardware components of Board 7271.
3.1 Board 7271 Front Panel
Board 7271 has a 3U/4HP front panel for 19’’ systems or 1U front panel for 1U systems. It is
equipped with the following components:
3U/4HP Front
Panel
3U/4HP Front
Panel
with Option
FG7271/PPM
ETH0-RJ45 socket - Ethernet LAN Interface
lnk/act LED - Activity with the Ethernet
10/100 LED - 10/100 MBit Ethernet
Send/system bus LED - Access to the Internal
System Bus
Fail LED - Readiness for Operation
Boot LED - Boot Status
Default Button - Board Reset / Default Setting
SUB-D male connector (9-pole)
Pin-No.
Assignment
1
Minute pulse of defined duration
(isolated, reference potential GND1)
2
reserved
3
reserved
4
reserved
5
GND
6
+12V DC (isolated, reference potential
GND1)
7
reserved
8
reserved
9
GND1 (isolated for minute pulse / +12V DC)
Optionally (FG7271/PPM) the Board 7271 is assembled with a SUB-D male connector to put
out a minute pulse (PPM).

BOARD 7271 CONSTRUCTION
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3.1.1 Status LEDs of the Board 7271
Board 7271 has Status LEDs on the front panel. These facilitate detection of the operating
status of installed boards.
The LEDs represent the following board conditions:
SEND LED (yellow)
Description
Flashing / flickering
Normal case –indicates access to the system bus. Board 7271 is
correctly integrated into System 7001 or 68xx.
Off
Board 7271 is not ready for operation.
On
Fault on Board 7271.
Fail LED (red)
Description
Off
Normal case –Board 7271 is not detecting any operating failure.
On
Board 7271 is not ready for operation or booting of the Board is
delayed (see Chapter 5.1 Delayed Readiness for Operation
after Switch-on / Reset).
Flashing (every
second)
Default button activated for less than 5 seconds.
Boot LED (yellow)
Description
Off
Normal case –Board 7271 is in operation.
On
Board 7271 is booting its operating system (duration approx. 1
minute).
lnk/act LED (green)
Description
Off
There is no LAN connection to a network.
On
LAN connection available.
Flashing
Activity (send / receive) on network.
10/100 LED (yellow)
Description
Off
10 MBit Ethernet detected.
On
100 MBit Ethernet detected.

BOARD 7271 CONSTRUCTION
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3.1.2 RJ45 Socket (ETH0)
Pin No.
Assignment
1
Tx+
2
Tx–
3
Rx+
4
Not in use
5
Not in use
6
Rx–
7
Not in use
8
Not in use
9
Not in use
The meanings of the RJ45 socket LEDs are described in Chapter 3.1.1
Status LEDs of the board 7271.
3.1.3 Reset / Default Button
The default button is activated by means of a thin object through the hole in the front panel
next to the "Default" inscription (see Chapter 5.2 Reset / Default Button).

BOARD 7271 CONSTRUCTION
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3.2 Overview of Board 7271 (3U/4HP) Assembly
ETH0
LEDs
Default
on
1 2 3 4 5 6 7 8
X4
DS1
MAC Address
Embedded PC
Connector, DIN41612, 64-pin VG male
3.2.1 DIP Switch DS1
The Base System in which the Board is to be operated is set via DIP switch DS1. The Board
number in the Base System is also set here.
DIP Switch
DS1
Function
8
Selection of the Base System 68xx or 7001
(see Chapter 6.1 Select the hopf Base System 68xx or 7001)
7
No function at present
6
Transmissions point of SINEC H1 time datagram
(see Chapter 8.3.2.6.3 Transmission point of SINEC H1 time datagram)
5
Board number in System 7001 / 68xx
(see Chapter 6.2 Setting the System Board Number)
4
3
2
1

BOARD 7271 CONSTRUCTION
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3.2.2 MAC Address Labels for ETH0
Each LAN interface is uniquely identifiable in the Ethernet by means of a MAC address
(hardware address).
The MAC address assigned to the respective LAN interface ETH0 can be found on the label
assigned to the board 7271. A unique MAC address is assigned by hopf Elektronik GmbH
for each LAN interface.
hopf Elektronik GmbH MAC addresses begin with 00:03:C7:xx:xx:xx.
3.2.3 Heat Sink
Due to the installation height, care should be taken to ensure that the heat sink does not
make contact with surrounding system components when removing or inserting Board 7271.

BOARD 7272 CONSTRUCTION
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4 Board 7272 Construction
This Chapter describes the hardware components of Board 7272.
4.1 Board 7272 Front Panel
Board 7272 has a 3U/4HP front panel for 19’’ systems or 1U front panel for 1U systems. It is
equipped with the following components.
The board is available in two versions. The L1 version is equipped with one Ethernet
interface and the L2 version with two Ethernet interfaces for two independent subnets.
3U/4HP
Front Panel
L1
7272
L1
Default
ETH0
1
8
1000 100 10
Send Fail Boot
NTP Stratum1 Accuracy
Status
3U/4HP
Front Panel
L2
7272
L2
Default
ETH0
1
8
1000 100 10
Send Fail Boot
NTP Stratum1 Accuracy
ETH1
1000 100 10
Status
1
8
10/100/1000 LED -
10/100/1000 MBit Ethernet + Activity
ETH0-RJ45 socket - Ethernet LAN Interface
Send/system bus LED -
Access to the Internal System Bus
Fail LED - Readiness for Operation
Boot LED - Boot Status
Default Button - Board Reset / Default Setting
NTP - Activity NTP-Service
Stratum1 - Actual Stratum Value
Accuracy - Actual Accuracy
10/100/1000-LED -
10/100/1000 MBit Ethernet + Activity
ETH1-RJ45 Buchse - Ethernet LAN Interface

BOARD 7272 CONSTRUCTION
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1U Slimline Front Panel
1000
100
10
Boot
Fail
Send
Accuracy
Stratum1
NTP
ETH0 Status
Default
10 / 100 / 1000
7272/L1
1000
100
10
Boot
Fail
Send
Accuracy
Stratum1
NTP
ETH0 Status
Default
10 / 100 / 1000
7272/L2
10
100
1000
ETH1
4.1.1 Status LEDs of the Board 7272
Board 7272 has Status LEDs on the front panel. These facilitate detection of the operating
status of installed boards.
The LEDs represent the following board conditions:
Board Status LEDs
SEND LED (yellow)
Description
Flashing / flickering
Normal case –indicates access to the system bus. Board 7272 is
correctly integrated into System 7001 or 68xx.
Off
Board 7272 is not ready for operation.
On
Fault on Board 7272.
Fail LED (red)
Description
Off
Normal case –Board 7272 is not detecting any operating failure.
On
Board 7272 is not ready for operation or booting of the Board is
delayed (see Chapter 5.1 Delayed Readiness for Operation
after Switch-on / Reset).
Flashing
(every second)
Default button activated for less than 5 seconds.
Boot LED (yellow)
Description
Off
Normal case –Board 7272 is in operation.
On
Board 7272 is booting its operating system (duration approx. 1
minute).

BOARD 7272 CONSTRUCTION
7271 and 7272 NTP/SINEC H1 LAN Board - V06.00 19 / 100
hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: in[email protected]
NTP Status LEDs
NTP-LED (Green)
NTP Service of the Board 7272
On
Normal case, is started
Off
is started
Stratum1-LED (Green)
NTP Service of the Board 7272 works with:
On
Stratum 1
Flashing
Stratum 2-15
Off
Stratum16
Accuracy-LED (Yellow)
NTP Service of the Board 7272 works with:
On
High accuracy
Flashing
Medium accuracy
Off
Low accuracy
The board internal NTP service works with the highest accuracy if all NTP
Status LED are lightning.
LAN Status LEDs
LAN LED ETH0/ETH1 (Yellow)
Description
10
100
1000
Flashes
Off
Off
10MBit link with activity
On
Off
100MBit link with activity
Off
On
1000MBit link with activity
Off
---
---
no activity LAN
4.1.2 RJ45 Socket (ETH0 / ETH1)
ETH0
1
8
Pin No.
Assignment
1
Tx+
2
Tx–
3
Rx+
4
Not in use
5
Not in use
6
Rx–
7
Not in use
8
Not in use
9
Not in use
4.1.3 Reset / Default Button
The default button is activated by means of a thin object through the hole in the front panel
next to the "Default" inscription (see Chapter 5.2 Reset / Default Button).

BOARD 7272 CONSTRUCTION
20 / 100 7271 and 7272 NTP/SINEC H1 LAN Board - V06.00
hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: in[email protected]
4.2 Overview of Board 7272 (3U/4HP) Assembly
Version L2:
ETH0
LED1
Default
X4
on
1 2 3 4 5 6 7 8
DS1
Connector, DIN41612, 64-pin VG male
ETH1
LED3
LED4
LED2
MAC Address
4.2.1 DIP Switch DS1
The Base System in which the Board is to be operated is set via DIP switch DS1. The Board
number in the Base System is also set here.
DIP Switch
DS1
Function
8
Selection of the Base System 68xx or 7001
(see Chapter 6.1 Select the hopf Base System 68xx or 7001)
7
No function at present
6
Transmissions point of SINEC H1 time datagram
(see chapter 8.3.2.6.3 Transmission point of SINEC H1 time datagram)
5
Board number in System 7001 / 68xx
(see Chapter 6.2 Setting the System Board Number)
4
3
2
1