Ru En
Designer and manufacturer of communication equipment
Russia (GMT +7)

VoIP Gateway TAU-36.IP

Mass production
Key features 
  • Office PBX functionality
  • High-quality sound
  • Current and voltage port protection
  • Measurement of subscriber line physical parameters
  • The maximum length of line – 6 km 
Multiport Access VoIP-gateways TAU series   are designed and suitable for voice and  facsimile information  transmission via the IP-network. Gateways provide customers with  high-quality  Telephone Communications with Value Added Services Support: call-forward, call waiting,  3-way conference, pick up, group call,  call line identification presentation etc.
High quality Voice
The high quality of sound is ensured by the use of the high- performance hardware, support for main audio codecs used in VoIP networks (G.711, G.723.1, G.726, G.729), echo cancellation function, use of silence detector, comfort noise generation, DTMF signals reception and generation and prioritization mechanisms (QoS).

In case of the loss of main SIP server connection, TAU switches to the redundant SIP server automatically with monitoring of service capability of the main one. If there is a connection loss with both servers, local switching among gateway subscribers is saved.

A friendly multilingual management interface and support for group management means based on TR-069 and DHCP (DHCP autoprovisioning) enable easy exploitation of unlimited number of TAU on an operator’s network.

Eltex.EMS management system
For gateways mass exploitation on network Eltex offers unified monitoring and control system  Eltex.EMS. The system provides gateways group centralized management with the ability of ports monitoring via unified web-interface.

Documents and files
VoIP protocols
  • SIP
  • SIP-T
  • H.323
  • H.248
Voice codecs
  • G.729 (A, B) 
  • G.711 (a-law, µ-law)
  • G.723.1 (6,3/5,3 Cbps)
  • G.726
Fax support
  • T.38 UDP Real-Time Fax
  • G.711 (a-law, µ-law) pass-through
Voice standards
  • VAD (Voice Activity Detection)
  • CNG (Comfort Noise Generation)
  • AEC (echo cancellation, G.168  recommendation)
Functional features
  • SIP server authentication with common username and password for all subscribers
  • SIP server authentication with individual username and password for each subscriber
  • Support for redundant SIP servers
  • Support for Outbound SIP servers from DHCP Option 120
  • Direct routing to the unregistered devices on a SIP server
  • Internal switching is saved in case of SIP server connection loss
  • Independent Value Added Services’ processing (distributed mini PBX mode)
  • Regular expressions in Dialplan
  • Caller and called numbers modifications
  • Distinctive ring service
  • User tone signals
  • Limitation of simultaneous connections
  • CPC (Calling Party Control): disconnect signal by circuit disruption
  • Support for pay phone
  • Support for operation behind NAT (STUN, PublicIP)
  • Signal generation when a handset is off-hooked
  • VAS management via a phone
  • Applying of settings without reboot
  • Forming of DHCP Option 82, Agent client circuit ID, Agent remote ID suboptions  
Quality of Service (QoS)
  • 4 priority queues
  • Packages  distribution  for queues on the basis of 802.1p priority and/or DSCP
  • Assigning of DSCP and 802.1р priorities for SIP and RTP packets  
Value Added Services
  • Caller line identity presentation (CLIP)
  • Issuing of a caller name and time of a call in FSK mode
  • Calling line identification restriction (CLIR)
  • Call Transfer (CFU, CFB, CFNR, CFOOS)
  • Call Pickup
  • 3-Way Conference
  • Hotline/Warmline
  • Call Waiting
  • Call Forward (CFU, CFB, CFNR, CFOOS)
  • Call Group
  • Call Hold
  • Music on Hold (MOH)
  • Message-waiting indicator (MWI)
  • Do not Disturb (DND)
  • IMS (3GPP TS 24.623) for Call Hold, Call Waiting, 3-Way Conference, Hotline, Call Transfer services management  
Network Functions
  • 802.1Q
  • Possibility to use different VLAN for signalling, RTP and management
  • SNTP
  • Local and external DNS
  • STP
  • LLDP
  • Dual homing redundancy
  • IPSec
  • Firewall  
Types of connections
  • Static IP-address
  • DHCP client
  • PPPoE client
  • PPTP client
  • Auto update of the firmware and configuration (DHCP options 43, 66 and 67)
  • Command line interface (CLI) via Telnet, SSH, Console port RS-232
  • Parameters configuring via SNMP (Eltex.EMS management system)
  • Parameters configuring via TR-069  
Remote monitoring
  • SNMP
  • TR-06
  • Syslog
  • Subscriber lines parameters testing
  • Checking for a phone available on the line  
  • Detailed statistics per port  
  • Call history
  • Username and password verification
  • Access rights delimitation: admin / user
  • Сonfiguration file encryption
  • Access to WEB via RADIUS authentication
  • Access to WEB only via HTTPS  
Operational lifetime of the ELTEX equipment
In development
Mass production
Mass production is over
Sold out
Support is over
Regardless of the operational lifetime stage, Eltex provides a 12 months warranty on all its telecommunication equipment.
During the warranty period the manufacturer ensures technical support and free-of-charge repair at the Enterprise which is situated in Novosibirsk.
As part of the warranty service, technical support is provided on the first-in first-out principle.
The priority support packages of 8/5 and 27/7 types are subjects to additional charges.