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Descriptions

tau4_tau8-_datasheet_2.4.2_en.pdf

Documentations

TAU-4_8.IP User manual v.2.4.2

Software

Software version 2.4.2 Software version 2.4.1 Software version 2.3.0 Software version 2.1.0.132 Software version 2.0.0

Downloads

VoIP Gateway TAU-8.IP

Office PBX functionality
3G/4G channel reservation
IPsec encryption
TR-069/DHCP-based autoprovisioning
Maximum line length—6 km
Measurement of subscriber's line parameters

TAU-8.IP VoIP gateway is an optimal solution for provision of advanced VoIP services to corporate clients via analogue phone devices.

Business solution
Due to the wide function set, TAU-8.IP can be used as an independent mini office PBX with internal switching and basic set of value added services as well as in interaction with IP PBX.

High-Quality Sound
A high-performance hardware platform based on an state-of-the-art Mindspeed Technologies chip, support for all popular audio codecs used in VoIP networks (G.711, G.723.1, G.726, G.729), echo cancellation, silence detector, comfort noise generator, DTMF signals reception and generation and traffic prioritization (QoS) ensure the high quality of the voice data.

Reservation
In case of loss of the main connection to the Internet, there is a possibility of automatic switching to a backup 3G/4G channel. If there is no a backup channel, the connection between gateway subscribers is saved.

Easy-to-Use
Centralized configuration downloading, intellectual firmware update and collection of data on subscriber gateway status can be realized through Eltex.ACS system via TR-069. Eltex.ACS provides simplicity of Eltex CPE management and reduces operating expenses.

Interfaces

8 FXS ports
1 WAN 10/100Base-T
1 USB port

VoIP protocols

Voice codecs

G.711 (a-law, µ-law)
G.723.1
G.726 (24 Kbps and 32 Kbps)
G.729 (a/b)

Fax

T.38 UDP Real-Time Fax
G.711 (a-law, µ-law) pass-through

Voice standards

VAD (Voice Activity Detector)
CNG (Comfort Noise Generation)
AEC (Acoustic Echo Cancellation, G.168 recommendation)

Functional features

Payphones connection (polarity reversal, meter impulses 12/16 KHz)
Measurement of customer line physical parameters
Internal switching is saved in case of a SIP-server connection failure
VAS management via a phone
Distinctive Ring
Keep-alive during operation behind NAT

DTMF

Detection and generation of signals
Transmission by INBAND, RFC 2833, SIP INFO methods

Value Added services

Call Hold
Call Transfer
Call Waiting
Calls forwarding when busy
Calls forwarding on no reply
Calls forwarding unconditional
Number identification (FSK Type I, FSK Type II, DTMF)
Calling Line Identification Restriction (CLIR)
Hotline/Warmline
Call Group
3-Way Conference
Pickup Group
Hunt group
3-Way Conference gathered on a server (RFC 4579)

VoIP functions

Internal connection switching
Operation without a SIP server
Flexible dial plan
3G/4G reservation
Management profiles for FXS ports
SIP profiles (support for up to 8 profiles)
Geographical redundancy of a SIP server (up to 4 redundant SIP servers)
Settings appliance without reboot
Voice transmission through a protected channel (encryption through IPsec)
IMS (3GPP TS 24.623) for Call Hold, Call Waiting, 3-Way Conference, Hotline management
SIP server appliance from DHCP option 120
Support for the operation behind NAT (STUN and Public IP)
Self call-control signal settings

Quality of service (QoS)

DSCP and 802.1p assignment for SIP and RTP packets
Bandwidth redundancy

Network functions

Different protocols for connection to a service provider network (Static, DHCP, PPPoE, PPTP, L2TP)
Local DNS server
Dynamic/static routing
VLAN per service (VLAN for each service: Internet, VoIP, Management)
Firewall
Operation via 3G/4G USB modems
Print server
IPsec (for voice transmission and remote control)

Management

WEB (multilingual*)
SNMP (phone parameters configuration, monitoring and statistics gathering)
Telnet
Syslog
SSH
TR-069 (operating through Eltex.ACS server is recommended)
DHCP-based autoprovision (43, 66, 67 DHCP options)
Management via IPsec encrypted channel

Security

Username and password authentication
Firewall
Access rights differentiation for admin/user
Password encryption
Digest authentication

USB port

USB-storage connection with FAT/FAT32/EXT2/EXT3/NTFS file systems – files exchange via a network according to FTP protocol
USB 3G/4G modem connection – 3G/4G channels reservation
Printer connection – setting up of a print server

Technical characteristics

CPU Mindspeed
SDRAM 256 MB
Flash 32 MB
OS Linux

Physical characteristics

Power adapter: 12 VDC, 2A
Power consumption: up to 16 W
Temperature: +5°С to +40°С
Humidity: up to 80%
Dimensions: 218х120х49 mm, desktop case
Weight: no more than 0.3 kg

Specifications

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 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 3361 DHCP Option 120
RFC 3550 RTP A Transport Protocol for Real-Time Applications

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* Supported by firmware version 1.2.1 and higher