Global Tech GT-IAD Series VoIP Gateway is kind of multi access equipment. Its uplink port can access with IP network and downlink port able to carry with multiple analog telephone.  Being user access layer equipment in next NGN network, GT-IAD series voice access gateway forwards data and voice of end user into Packet Switched Network and accomplish relative functions.
Processing data and voice of traditional voice service which VoIP ATA provides, it contains functions such as forwarding the data packet, processing the analog voice and streaming media forwarding. These advance features makes VOIP ATA products support existing and new service of NGN network. The unit  Support Call hold, Call waiting, Call forward, Do not disturb, Blind transfer, Attended transfer, 3-way conference

Global Tech IAD Series VoIP gateway support 1 up to 32 ports FXS/FXO/Mix for 1U,19inch.End user can select H.248/SIP/MGCP by WEB browswer.  It can also support H.248 protocol with special feature such as internal call and PSTN escaping.

Feature

* Complete product line, support up to 128 ports of fxs/fxo.
* Support main protocol such as SIP,H.248 and MGCP.
* G.711 A-Law/u-Law,G.723.1 ,G.729 A/B ; High quality voice, support for voice encoding / compression the G.711 A-Law/u-Law, G.723.1, G.729 A, / B;
* Support VLAN tagging and QoS which able to distinguish services
* Flexible access, Strong network adaptability. Network setting support various kind of ways such as static address, PPPoE and DHCP. 
* Provide data port for network connection of terminal such as PC.

Technical Parameter

● Protocol
■  VoIP: SIP, MGCP, H.248
■  Facsimile: T.30, VBD, T.38
■  Media Transmission: RTP/RTCP, SDP
■  Network layer protocol: TCP/IP, PPPoE, DHCP Client/Server, NAT, Bridge, IEEE802.1p/Q
■  Network Management Protocol: SNMP,TFTP
■  QoS: IEEE802.1p, IEEE802.1Q, VLAN, IPv4, ToS

● Voice Encoding and Decoding
■  ITU-T G.711(A-law/μ-law)
■  G.729 A/B
■  G.723.1

● Voice Parameter
■  Voice Activation Detection
■  Comfort Noise Generator
■  Dynamic Jitter Buffer Processing
■  Echo Cancellation: maximum 32ms

● Network Management and Configuration
■  WEB
■  SNMP
■  CLI

● Software Upgrade
■  CLI
■  TFTP
■  WEB

● Hardware Parameter
■  Ethernet Interface: 2 ports of 10M/100M RJ-45 Ethernet, 1 port of WAN and LAN
■  PSTN Interface: RJ11/RJ21/HBR68, FXO and FXS(Maximum 128 ports in flexible configuration)
■  Testing Interface: RS-232
■  Power Adapter: 220V Adapter

● Operation Environment
■  Working Temperature: 0℃ to 50℃
■  Storage Temperature: -10℃ to 70℃
■  Relative Humidity: 10% to 90％
■  Power Consumption: 6 up to 250W
■  Physical Dimension:
Standalone   197mm×47mm×264mm
Rack Mounted   482mm×44mm×280mm