ELTEX TAU-36.IP User manual

TAU-72.IP TAU-36.IP
Operation Manual
Version 2.13.1 (November 2015)
Universal Network Terminal

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2 TAU-72.IP/TAU-36.IP Universal Network Terminal
Firmware version: 2.13.1
Linux version: 290 Wed Mar 4 15:28:17 NOVT 2015
Firmware version: v10_23_03_15
BPU version: v20140909 date: 2014 Sep 9 time 10:26:19
Factory default IP address 192.168.1.2
username: admin
password: rootpasswd
Document version
Issue date
Revisions
Version 1.0
10 November 2015
First issue.

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TAU-72.IP/TAU-36.IP Universal Network Terminal 3
TAU-72.IP/TAU-36.IP Firmware Update Instructions, Upgrading to the Latest Version
New firmware versions utilize new update method and new firmware file format. Exercise
caution and follow instructions while performing firmware update.
Steps necessary to update the firmware to the latest version (2.13.1).
Verify that the name of the firmware version 2.13.1 file is firmware.img32.
If the current switch firmware version is 1.9.0 or earlier (including legacy versions with 4-
digit version number):
1. Download the firmware version 1.11.4 file:
http://eltex.nsk.ru/upload/files/tau36_72/tau36_72/1_11_4/firmware.tar.gz
2. Download the firmware version 2.13.1 file:
http://eltex.nsk.ru/upload/files/tau36_72/2.13.1/firmware.img72
3. In the device web configurator, select 'Service' menu, and then 'Firmware upgrade' tab. In the dialog
window, browse to the firmware version 1.11.4 file. To do this, click the 'Browse' button in 'Universal
firmware upgrade' section and then click 'Upgrade firmware' button. Verify that the name of the file is
firmware.tar.gz.
4. Wait until firmware upgrade process is completed; after that TAU should automatically restart.
5. When the device is rebooted, open web configurator and click 'Save' button shown next to any
configuration menu item, e.g. on 'Network' tab.
6. When configuration is saved, update firmware in a similar manner using the firmware version 2.13.1
file. Verify that the name of the firmware version 2.13.1 file is firmware.img72.
If the current switch firmware version is 2.1.0 through 2.1.4:
1. Download the firmware version 2.1.4 file:
http://eltex.nsk.ru/upload/files/tau36_72/tau36_72/2_1_4/firmware.tar.gz
2. Download the firmware version 2.13.1 file:
http://eltex.nsk.ru/upload/files/tau36_72/2.13.1/firmware.img72
3. In the device web configurator, select 'Service' menu, and then 'Firmware upgrade' tab. In the dialog
window, browse to the firmware version 2.1.4 file. To do this, click the 'Browse' button in 'Universal
firmware upgrade' section and then click 'Upgrade firmware' button. Verify that the name of the file is
firmware.tar.gz.
4. When the device is rebooted, update firmware in a similar manner using the firmware version 2.13.1
file. Verify that the name of the firmware version 2.13.1 file is firmware.img72.
If the current switch firmware version is 2.2.0 through 2.5.0:
1. Download the firmware version 2.5.0 file:
http://eltex.nsk.ru/upload/files/tau36_72/tau36_72/2_5_0/firmware.img72
2. Download the firmware version 2.13.1 file:
http://eltex.nsk.ru/upload/files/tau36_72/2.13.1/firmware.img72
3. In the device web configurator, select 'Service' menu, and then 'Firmware upgrade' tab. In the dialog
window, browse to the firmware version 2.5.0 file. To do this, click the 'Browse' button in 'Universal
firmware upgrade' section and then click 'Upgrade firmware' button. Verify that the name of the file is

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4 TAU-72.IP/TAU-36.IP Universal Network Terminal
firmware.img72.
4. When the device is rebooted, update firmware in a similar manner using the firmware version 2.13.1
file. Verify that the name of the firmware version 2.13.1 file is firmware.img72.
If the current switch firmware version is 2.5.0 or later:
1. Download the firmware version 2.13.1 file:
http://eltex.nsk.ru/upload/files/tau36_72/2.13.1/firmware.img72
2. Before firmware update, restart the device to free up cache in RAM.
3. In the equipment web interface, select 'Service' menu, and then 'Firmware upgrade' tab. In the dialog
window, browse to the firmware version 2.13.1 file. To do this, click the 'Browse' button in 'Universal
firmware upgrade' section and then click 'Upgrade firmware' button. Verify that the name of the file is
firmware.img72.
If you are unable to update the firmware using web configurator or other means, use the
alternative firmware update method. The alternative firmware update method is described
in Appendix B of this Operation Manual. Necessary files are located in reserve_soft.zip
archive.

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TAU-72.IP/TAU-36.IP Universal Network Terminal 5
SYMBOLS
Symbol
Description
Bold font face
Notes, warnings, chapter headings, titles, table titles are written in bold.
Calibri Italic
Important information is written in Calibri Italic.
Courier New
Command entry examples, command execution results and program output
data are written in Courier New semibold.
<KEY>
Keyboard keys are written in upper-case and enclosed in angle brackets.
Analogue phone unit icon
Gatekeeper icon
TAU Universal Network Terminal icon
MES3124F Ethernet switch icon
Softswitch ECSS-10 hardware-software switch icon
Digital subscriber PBX icon
Network Connection icon
Optical transmission medium
Notes and warnings
Notes contain important information, tips or recommendations on device operation and
setup.
Warnings are used to inform the user about harmful situations for the device and the user
alike, which could cause malfunction or data loss.
TARGET AUDIENCE
This operation manual is intended for technical personnel that performs switch installation, configuration,
monitoring, and maintenance using web configurator. Qualified technical personnel should be familiar with the
concepts.

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6 TAU-72.IP/TAU-36.IP Universal Network Terminal
CONTENTS
1 INTRODUCTION ........................................................................................................................................................................ 9
2 PRODUCT DESCRIPTION ......................................................................................................................................................... 10
2.1 Purpose........................................................................................................................................................................... 10
2.2 Typical Application Diagrams.......................................................................................................................................... 12
2.3 Product Design and Operating Principle......................................................................................................................... 13
2.4 Main Specifications......................................................................................................................................................... 14
2.5 Design ............................................................................................................................................................................. 15
2.6 Ventilation ...................................................................................................................................................................... 18
2.7 LED Indication ................................................................................................................................................................. 19
2.8 'F' Function Button Operation ........................................................................................................................................ 19
2.9 Delivery Package............................................................................................................................................................. 20
2.9.1 TAU-72.IP ................................................................................................................................................................ 20
2.9.2 TAU-36.IP ................................................................................................................................................................ 20
3 INSTALLATION ORDER AND SEFETY MEASURES ..................................................................................................................... 21
3.1 Safety instruction............................................................................................................................................................ 21
3.1.1 General Guidelines.................................................................................................................................................. 21
3.1.2 Electrical Safety Requirements ............................................................................................................................... 21
3.1.3 Electrostatic Discharge Safety Measures ................................................................................................................ 22
3.2 TAU-72.IP/TAU-36.IP Installation ................................................................................................................................... 22
3.3 Startup sequence............................................................................................................................................................ 22
4 GENERAL SWITCH OPERATION GUIDELINES........................................................................................................................... 23
5 DEVICE CONFIGURATION ....................................................................................................................................................... 24
5.1 TAU-72.IP/TAU-36.IP configuration via WEB Interface. Administrator Access .............................................................. 24
5.1.1 Network settings..................................................................................................................................................... 27
5.1.1.1 Network .......................................................................................................................................................... 27
5.1.1.2 VLAN conf........................................................................................................................................................ 31
5.1.1.3 Static Route ..................................................................................................................................................... 33
5.1.1.4 Local DNS (Hosts) ............................................................................................................................................ 34
5.1.1.5 SNMP protocol configuration.......................................................................................................................... 35
5.1.1.5.1 SNMP monitoring .................................................................................................................................. 37
5.1.1.5.2 Device Configuration via SNMP ............................................................................................................. 38
5.1.1.6 Syslog Protocol Configuration ......................................................................................................................... 48
5.1.1.7 Firewall configuration ..................................................................................................................................... 49
5.1.1.8 NTP Configuration ........................................................................................................................................... 51
5.1.1.9 TR-069 Monitoring and Management Protocol Configuration (ACS) ............................................................. 52
5.1.1.10 Automatic update configuration (Autoupdate) ............................................................................................ 54
5.1.2 VoIP Configuration (PBX) ........................................................................................................................................ 56
5.1.2.1 Basic Configuration (Main).............................................................................................................................. 56
5.1.2.2 SIP/H323 Profiles............................................................................................................................................. 57
5.1.2.2.1 SIP Common Parameters (SIP Common) ............................................................................................... 57
5.1.2.2.1.1. SIP- .................................................................................................................... 59
5.1.2.2.2 H.323 Protocol....................................................................................................................................... 60
5.1.2.2.3 SIP Custom Parameters (Profile N SIP Custom) ..................................................................................... 63
5.1.2.2.4 Codecs Configuration (Profile N Codecs)............................................................................................... 70
5.1.2.2.5 Routing and Pickup Code Configuration (Profile N Dialplan) ................................................................ 76
5.1.2.2.6 Alert-Info distinctive ring....................................................................................................................... 82
5.1.2.3 Configuration of network ports (TCP/IP) ........................................................................................................ 83
5.1.2.4 PortsConfiguration of Subscriber Ports (Ports) ............................................................................................... 85
5.1.2.5 Simultaneous Call Limits (Call limits)............................................................................................................... 95
5.1.2.6 Configuration of Supplementary Service Codes (Suppl. Service Codes) ......................................................... 95
5.1.2.7 Serial groups.................................................................................................................................................... 97
5.1.2.8 Pickup Group Configuration (Pickup Groups) ................................................................................................. 99
5.1.2.9 'Distinctive Ring' Service Configuration ........................................................................................................ 101
5.1.2.10 Modifiers ..................................................................................................................................................... 103
5.1.3 Switch.................................................................................................................................................................... 104
5.1.3.1 Switch ports settings ..................................................................................................................................... 104
5.1.3.2 Tracing, Network Traffic Mirroring ............................................................................................................... 107
5.1.3.3 802.1q ........................................................................................................................................................... 107
5.1.3.4 QoS & Bandwidth control ............................................................................................................................. 109

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TAU-72.IP/TAU-36.IP Universal Network Terminal 7
5.1.4 Monitoring ............................................................................................................................................................111
5.1.4.1 Subscriber Port Monitoring (Port) .................................................................................................................111
5.1.4.2 Board Parameter Status Monitoring (Status) ................................................................................................115
5.1.4.3 Switch Port Status Monitoring (Switch).........................................................................................................117
5.1.4.4 Supplementary Service Status Monitoring (Suppl.Service) ...........................................................................118
5.1.4.5 IMS SS status Monitoring ..............................................................................................................................119
5.1.4.6 Serial Group Registration Status Monitoring.................................................................................................120
5.1.5 System Information (System info).........................................................................................................................121
5.1.5.1 Service Status Monitoring (Device info) ........................................................................................................121
5.1.5.2 Route .............................................................................................................................................................122
5.1.5.3 ARP ................................................................................................................................................................123
5.1.6 Service ...................................................................................................................................................................123
5.1.6.1 Firmware upgrade .........................................................................................................................................123
5.1.6.2 Download/Upload Configuration (Backup/Restore) .....................................................................................124
5.1.6.3 Reboot ...........................................................................................................................................................125
5.1.6.4 Encryption Features (Security) ......................................................................................................................126
5.1.6.5 'Music on Hold' service configuration (MOH) ...............................................................................................127
5.1.6.6 Changing Access Passwords using Web Configurator (Password) ................................................................129
5.1.6.7 Change user ...................................................................................................................................................130
5.2 TAU-72.IP/TAU-36.IP Configuration via web Interface Operator Access......................................................................130
5.3 Non-privileged user access for device monitoring........................................................................................................132
5.3.1 Monitoring ............................................................................................................................................................132
5.3.2 System info............................................................................................................................................................132
5.4 Supervisor Access..........................................................................................................................................................133
6 COMMAND LINE MODE AND TERMINAL MODE OPERATION..............................................................................................134
6.1 Basic Commands ...........................................................................................................................................................134
6.2 Call Statistic ...................................................................................................................................................................135
6.2.1 Command Line Mode ............................................................................................................................................135
6.2.2 Statistic File Operations.........................................................................................................................................137
6.2.3 Port-specific Statistics ...........................................................................................................................................137
6.3 Configuration writing/readout......................................................................................................................................137
6.4 Setting password for  ................................................................................................................................138
6.5 Reset to Factory Defaults ..............................................................................................................................................139
7 SUPPLEMENTARY SERVICES USAGE ......................................................................................................................................140
7.1 Calltransfer....................................................................................................................................................................140
7.2 Call Waiting ...................................................................................................................................................................143
7.3 3-way conference..........................................................................................................................................................143
8 CONNECTION ESTABLISHMENT ALCORITHMS ......................................................................................................................147
8.1 Algorithm of a Successful Call via SIP Protocol .............................................................................................................147
8.2 Call Algorithm Involving SIP Proxy Server .....................................................................................................................148
8.3 Call Algorithm Involving Forwarding Server..................................................................................................................149
8.4 Algorithm of a Successful Call via H.323 Protocol.........................................................................................................150
8.5 Algorithm of a Successful Call via H.323 Protocol with Gatekeeper .............................................................................151
9 DESCRIPTION OF CONFIGURATION FILES .............................................................................................................................152
9.1 Configuration file CFG.YAML ......................................................................................................................................152
9.1.1 VoIP configuration.................................................................................................................................................152
9.1.2 Device network settings ........................................................................................................................................168
9.1.3 Switch port settings...............................................................................................................................................172
APPENDIX A. TAU-72.IP/TAU-36.IP NETWORK TERMINAL CONTACT PIN ASSIGNMENT.........................................................176
APPENDIX B. ALTERNATIVE FIRMWARE UPDATE METHOD.....................................................................................................178
APPENDIX C. GENERAL DEVICE SETUP / CONFIGURATION PROCEDURE .................................................................................180
APPENDIX D. EXAMPLE OF SWITCH CONFIGURATION USING VLAN .......................................................................................186
APPENDIX E. EXAMPLE OF PABX CONFIGURATION WITH TAU-72.IP/TAU-36.IP.....................................................................187
APPENDIX F. CALCULATION OF PHONE LINE LENGTH .............................................................................................................190
APPENDIX G. AUTOMATIC CONFIGURATION PROCEDURE AND GATEWAY FIRMWARE VERSION CHECK ..............................192
APPENDIX H. DEVICE FIREWALL CONFIGURATIONIPTABLES................................................................................................198
APPENDIX J. PROCESSING OF INFO REQUESTS CONTAINING APPLICATION/BROADSOFT AND APPLICATION/SSCC AND USED
FOR SUPPLEMENTARY SERVICES .............................................................................................................................................199
APPENDIX K. DESCRIPTION EVENTS SENT TO THE MESSAGE TRAP, TRAP V2, INFORM ..........................................................200
APPENDIX L. HELP ON TIMEZONES ..........................................................................................................................................202

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8 TAU-72.IP/TAU-36.IP Universal Network Terminal
TECHNICAL SUPPORT............................................................................................................................................................... 205

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TAU-72.IP/TAU-36.IP Universal Network Terminal 9
1INTRODUCTION
TAU-72.IP/TAU-36.IP Universal Network Terminal allows to connect analogue phone units to packed-
based data networks accessible through copper-wire or optical Ethernet interfaces.
TAU-72.IP/TAU-36.IP could be used as a subscriber access point utilizing SIP/SIP-T and H.323 protocols and
provides a perfect telephone communication solution for underpopulated areas, offices, dwellings and
geographically dispersed facilities.
This operation manual describes intended use, key specifications, configuration, and firmware update
methods for TAU-72.IP/TAU-36.IP network terminal (hereinafter the "device").

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10 TAU-72.IP/TAU-36.IP Universal Network Terminal
2PRODUCT DESCRIPTION
2.1 Purpose
TAU-72.IP/TAU-36.IP is a subscriber VoIP gateway with integrated Layer 2 Ethernet switch that uses
copper-wire and optical Gigabit Ethernet interfaces to establish connection to provider's IP network. In order to
transfer data via IP networks, device converts analogue voice signals to digital data packets.
When utilized at the stage of transition from TDM to NGN networks, the terminal allows you to keep the
existing network infrastructure and analogue subscribers to access IP networks.
Interface types:
–72 or 36 Analogue ports FXS;
–Three Ethernet 10/100/1000BaseT electrical interfaces.
–Two or one Mini-Gbic (SFP) Ethernet 1000Baseoptical interfaces.
Device features:
—Integrated Layer 2 Ethernet switch.
—VoIP protocols: H.323, SIP/SIP-T1.
—Static address and DHCP support.
—Echo cancellation (G.168 recommendation).
—Packet loss concealment (PLC).
—Voice activity detector (VAD).
—Silence suppression.
—DTMF tone detection and generation.
—Fax transmission: upspeed/pass-through; T.38 UDP Real-Time Fax.
—Cisco NSE support.
—V.152 support.
—Flexible numbering scheme.
—Operation with and without external gatekeeper (H.323/RAS).
—Operation with multiple SIP servers in various SIP profiles.
—Support for VoIP operation in the switch in case of SIP server connection loss.
—Active session support for SIP protocol operations through NAT.
—Transmission of cpc-rus subscriber category via SIP protocol.
—Configuration file download/upload via FTP/FTPS, TFTP, HTTP/HTTPS.
—Firmware update via TFTP, HTTP/HTTPS.
—Automatic configuration and firmware update via FTP, TFTP, HTTP/HTTPS.
—STP support.
—LLDP support.
—iptables network-level firewall.
—STUN support.
—Service (simulation service) management using IMS (3GPP TS 24.623).
—Remote monitoring, configuration and setup:
Web interface.
telnet.
1SIP-T only supports basic call establishment, additional types of service are not implemented

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TAU-72.IP/TAU-36.IP Universal Network Terminal 11
SSH.
SNMP.
TR-069.
User authentication with RADIUS server.
Supported supplementary services:
Call Hold/Retrieve.
Call Transfer.
Call Waiting notification.
Call Forward Busy
Call Forward No Answer.
Call Forward Unconditional.
Call Forward Out Of Service.
Caller ID with ETSI FSK type 1, type 2.
Caller ID in DTMF format.
'Russian Caller ID'.
Calling without Caller ID broadcasting.
Hotline/warmline.
Call Hunt.
Call PickUp.
3-way conference (local or using conference server).
Voice message waiting indicatorMWI.
Do Not Disturb.
SIP, supported recommendations:
–RFC 3261 SIP 2.0;
–RFC 3262 SIP PRACK;
–RFC 4566 Session Description Protocol (SDP);
–RFC 3263 Locating SIP servers for DNS lookup SRV and A records;
–RFC 3264 SDP Offer/Answer Model;
–RFC 3265 SIP Notify;
–RFC 3311 SIP Update;
–RFC 3515 SIP REFER;
–RFC 3891 SIP Replaces Header;
–RFC 3892 SIP Referred-By Mechanism;
–RFC 4028 SIP Session Timer;
–RFC 2976 SIP INFO Method;
–RFC 2833 RTP Payload for DTMF Digits, Flash event;
–RFC 3108 Attributes ecan and silenceSupp in SDP;
–RFC 4579 SIP. Call Control - Conferencing for User Agents;
–RFC 3372 SIP for Telephones (SIP-T);

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12 TAU-72.IP/TAU-36.IP Universal Network Terminal
–RFC 3398 ISUP/SIP Mapping;
–RFC 3204 MIME Media Types for ISUP and QSIG (ISUP support);
–RFC 3361 DHCP Option 120;
–SIP OPTIONS Keep-Alive (SIP Busy Out);
–NAT support.
2.2 Typical Application Diagrams
This manual covers the following TAU connection methods:
1. Subscriber access point In this case, the device acts as a gateway between analogue phone units and
remote PBX, see Fig. 1. Gateway subscriber ports are registered at the software switchSoftswitch.
Supplementary services in this method are provided by the software switch.
Fig. 1TAU-72.IP/TAU-36.IP subscriber access point

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TAU-72.IP/TAU-36.IP Universal Network Terminal 13
2. Distributed mini-PABX mode In this case, the device acts as a mini-PABX that is able to access other
gateways (TAU-32.IP, AU-72.IP, etc.) and Softswitch using SIP/H.323 protocols. The device allows for
unassisted processing of supplementary services, call routing, see Fig. 2.
Fig. 2TAU-72.IP/TAU-36.IP distributed mini-PABX
2.3 Product Design and Operating Principle
Subscriber voice signals are served to audio codecs of subscriber units, where they are encoded using one
of the selected standards, and then sent as digital packets to the controller via internal backbone. In addition to
voice signals, digital packets contain control and interaction signals.
Fig. 3 shows TAU-72.IP/TAU-36.IP functional chart.
Fig. 3TAU functional chart

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14 TAU-72.IP/TAU-36.IP Universal Network Terminal
2.4 Main Specifications
Table 1 lists main specifications of the terminal.
Table 1Main specifications of the terminal
Protocols and Standards
Protocol stack
ITU-T H.323 v3/v4/v5
Communication protocol for session initiation, monitoring
and cancellation
SIP
Fax support
T.38 UDP Real-Time Fax
pass-through (G.711A/U)
Modem support
V.152
CISCO NSE
Voice standards
VAD (voice activity detector)
AEC (echo cancellation, G.168 recommendation)
CNG(comfort noise generator)
Voice codecs
Voice codecs
G.729AB
G.711(A/U)
G.723.1 (6.3 Kbps, 5.3 Kbps)
G.726 32 kBps (for SIP only)
The number of simultaneous channels supported by the device, depending on the type of codec
Codec
Number of Channels
G.711 (A/U)
G.729 / 20-80
G.729 A / 10
G.723.1
G.726

TAU-72.IP
TAU-36.IP
72
72
62
58
72
54
36
36
36
36
36
36
Parameters of electrical Ethernet interface
No. of ports:
3
Electrical connector
RJ-45
Transfer rate, Mbit / s
Autonegotiation, 10/100/1000 Mbps/s
duplex
Standards support
10/100/1000Base-T
Parameters of the optical Ethernet interface
No. of ports:
V1.0, V2.0
V3.0, V4.0
1
2
Optical connector
Mini-Gbic (SFP):
1) full-duplex, two-fiber with 1310 nm (Single-Mode),
1000BaseX (LC connector), the supply voltage - 3.3V
2) duplex, single fiber with wavelengths in the
transmission/reception 1310/1550 nm, 1000BaseX (SC
connector), the supply voltage - 3.3V
Transfer rate, Mbit / s
1000 Mb/s, duplex
Standards support
1000Base-X
Analogue interfaces
No. of ports:
TAU-72.IP
72
TAU-36.IP
36
Loop resistance:
up to 3.4
Dialling reception
pulse/frequency (DTMF)
Caller ID
FSK (ITU-T V.23, Bell 202), DTMF, Russian caller ID

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TAU-72.IP/TAU-36.IP Universal Network Terminal 15
Comprehensive protective circuit
Comprehensive protective circuit (current and voltage)
To protect subscriber line surge linear side cross
must be equipped with a three-pole arresters voltage
230V operation. Recommended arresters company
KRONE "МК, 230 V" with heat protection spring.
Remote measurement of parameters of the subscriber line
yes
Parameters set
programmable
Console
RS-232 Serial port
Data rate, Mbit / s
115200
Electrical parameters of signals
According to ITU-T Recommendation V.28
Network and Configuration
Connection types
Static IP, DHCP client
Management
WEB, RS-232 console, Telnet, SSH
Security
User name and password verification, HTTPS, FTPS
Physical specifications and ambient conditions
Power voltage
V1.0, V2.0, V3.0
V4.0
DC: -36..- 
DC: -36..-
AC: ~150-25050 
When using a small unvented
closet (access setting)
load capacity structure-one to
Earl 0.4 / port.
If you use of forced-tional
ventilation cabinet to operate at
heavy load.
Power consumption without active subscribers
30 W
Current consumption of active subscriber set
30 mA
Operating temperature range

Relative humidity
Up to 80 %
Dimensions (W x H x D)
42045240 mm, 19" form-factor, 1U size
Weight
3.2kg
2.5 Design
TAU-72.IP/TAU-36.IP network termi-factor rack-mount 1U shelf
installation.
The front panel of the device TAU-72.IP is shown in Fig. 4a-d.
Fig. 4aTAU-72.IP v2.0 front panel appearance
1
2
3
5
4
5
5
5
6
7
8

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16 TAU-72.IP/TAU-36.IP Universal Network Terminal
Fig. 4bTAU-72.IP v3.0 front panel appearance
Fig. 4cTAU-72.IP v4.0 front panel appearance mains DC
Fig. 4dTAU-72.IP v4.0 front panel appearance mains AC
The front panel of the device TAU-72.IP is shown in Fig. 4e-f.
Fig. 4eTAU-36.IP front panel appearance mains DC
Fig. 4f TAU-36.IP front panel appearance mains AC
1
2
3
5
4
5
5
5
6
7
8
1
2
3
5
4
5
5
5
6
7
8
2a
3
5
4
5
5
5
6
7
8
1
2
3
4
5
5
6
7
8

3
4
5
5
6
7
8

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TAU-72.IP/TAU-36.IP Universal Network Terminal 17
Connectors, LEDs and controls located on the front panel of the device are listed in Table 2.
Table 2Description of connectors, LEDs, and controls located on the front panel
№
Front panel elements
Description
1
Power
Power switch
2
-48V
Connector for DC power supply with rated voltage -48VDC
(permissible voltage from -36VDC to -60VDC)
2a
~150 –250 VAC, 50 Hz max 2A
Connector for AC power supply with voltage 150250VAC, 50Hz
(depending on the order)
3
F
Function button
4
Power
Power indicator
Status
Device operation indicator
Alarm
Alarm indicator Shows three types of alarms
SFP (SFP0, SFP1)
SFP optical interface activity indicator
5
Line 1...18, 19…36, 37…54, 55…72
CENC-36M connectors (for contact pin assignment, see Appendix A)
6
10/100/1000
3 x RJ-45 ports of Ethernet 10/100/1000 Base-T interfaces
7
Console (COM)
RS-232 console port for local control of the device
8
SFP (SFP0, SFP1)
Chassis for optical SFP modules of 1000Base-X Gigabit uplink
interface used for IP network connection
The rear panel of the device is shown in Fig. 5.
Fig. 5TAU-72.IP/TAU-36.IP rear panel appearance
An earthing bolt is located on the rear panel of the device.
For contact pin assignment, see Appendix A.

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18 TAU-72.IP/TAU-36.IP Universal Network Terminal
2.6 Ventilation
Fig. 6 Fans location
On the sides of the device are air vents that serve to dissipate heat. On the inside of the side panel is
equipped with two fans (shown in the figure).
The air flow passes through the perforated right side of the unit, passes through the entire range of the
internal components to cool each of them, and displayed by fans perforated side panels on the left side. The rest
of the unit do not contain ventilation holes that allow to maintain the necessary internal pressure of air flow.
Do not block air vents with foreign objects. This can lead to overheating of components of the device
and cause trouble in its operation.
When installing the product in a closed ventilated cabinet volume of less than 180 liters per device
with DC-powered performance of the product does not exceed 0.8 Erlang per subscriber set.
When installing the product in a closed ventilated cabinet volume of less than 180 liters per device
powered by AC performance of the product does not exceed 0.4 Erlang per subscriber set.

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TAU-72.IP/TAU-36.IP Universal Network Terminal 19
2.7 LED Indication
Power1, Alarm, Status, SFP LEDs located on the front panel indicate the current state of the device. Table
3 lists possible states of the LEDs.
Table 3Device status LED indication
Indicator
Indicator State
Device State
Power1
solid green
power on
off
power of
Status
solid red
operating system is not loaded (together with LED Alarm)
main application is not running (together with LED Alarm,
flashing mode Fatal)
solid yellow
device initialization in progress, subscriber ports are not
initialized yet
address is not obtained through DHCP (if dynamic address
obtaining method is enabled)
solid green
subscriber ports are initialized, device is in operation
off
operating system loaded, board type identified
flashes red, yellow, and
green
factory Safemode (together with LED Alarm, flashing
mode Fatal)
Alarm
solid red
alarm port blocking, the output value of the parameter
sensor platform within range
solid on
Warningport blocking, operating system loading
flashes slowly
(once per second)
Error (failure)module sensor failure (SFP module
installed, but there is no link)
flashes rapidly
(once per 200ms)
Fatal (critical failure)connection of the main application
to subscriber ports is lost
off
normal state
SFP (SFP0, SFP1)
solid green
optical link is present
off
no optical link
Ethernet interface state is shown by 1000/100 socket built-in LED indicators.
Table 4Light indication of Ethernet 10/100/1000 interfaces
LED/Status
LED/Status
Yellow LED
10/100/1000
Green LED
10/100/1000
solid on
solid on
Port operates in 1000Base-T mode, data transfer is inactive
solid on
flashes
Port operates in 1000Base-T mode, data transfer is active
off
solid on
Port operates in 10/100Base-TX, data transfer is inactive
off
flashes
Port operates in 10/100Base-TX, data transfer is active
2.8 'F' Function Button Operation
To reboot the operating device, press and hold 'F' button located on the front panel of the device for 5
seconds. Alarm LED will become solid red. Also, this button allows you to reset the device to factory settings
when you forget or don't know device IP address or password used for login. To do this, turn the device on while
holding 'F' button. Hold the button until Status LED begins to flash yellow, green and red alternatively, and
1For TAU-72.IP/TAU-36.IP v1.0, v 2.0 only

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20 TAU-72.IP/TAU-36.IP Universal Network Terminal
Alarm LED becomes solid red. After that, you can access the device by IP address 192.168.1.2. When connecting
with web configurator, default password for admin user is rootpasswd.
For detailed description of the factory reset procedure, see Section 6.5 'Reset to factory settings in
protected mode'.
2.9 Delivery Package
2.9.1 TAU-72.IP
TAU-72.IP standard delivery package includes:
–TAU-72.IP universal network terminal.
–CENC-36M connector4pcs (if 18 pairs of UTP CAT5E cable were not included in order).
–RS-232 DB9(F) DB9(F) cable for console port connection.
–Earthing cable.
–A mounting set for 19'' rack.
–Operation manual on CD-disk.
–Declaration of conformity.
–Passport.
For devices version v2.0, v3.0, v4.0 (TAU-72.IP power DC):
–PVS cable  2m.
For devices version v4.0 (TAU-72.IP power AC):
–Power cable Europlug.
If ordered, delivery package may also include:
—1000Base-T/Mini-Gbic (SFP) optical interface1/2pcs.
—18 pai-2pcs.
2.9.2 TAU-36.IP
TAU-36.IP standard delivery package includes:
–TAU-36.IP universal network terminal.
–CENC-36M connector2pcs (if 18 pairs of UTP CAT5E cable were not included in order).
–RS-232 DB9(F) DB9(F) cable for console port connection.
–Earthing cable.
–A mounting set for 19'' rack.
–Operation manual on CD-disk.
–Declaration of conformity.
–Passport.
For devices TAU-36.IP power DC:
–PVS cable  2m;
For devices TAU-36.IP power AC:
–Power cable Europlug;
If ordered, delivery package may also include:
—1000Base-T/Mini-Gbic (SFP) optical interface1/2pcs.
—-1pcs.