Top Selling SIP 2 Ports FXS FXO VoIP Media Gateway for Call Terminal

Introduction
    BTA-20 is a high-performance VoIP adapter with 2 FXO ports. With two LAN ports, it can be used as a small switch to provide Internet access for other devices.
    BTA-20 is a portable and powerful adapter with rich functions, enjoying convenient data connection and HD voice communication.

Key Features
   * 2 FXO Ports
   * 2 LAN Ports
   * High-performance NAT
   * SIP V2.0 Protocol
   * LED Indicators
   * SAS
   * Support TR069 & SNMP
   * Identify Toll Calls


Specifications

Audio Codec
> G.711(A/u), PAMS>4.3
> G.729A/AB, PAMS>4.0
> Adaptive jitter buffer
> Voice activity detection
> Comfort noise generation
> Echo cancellation

FXO Features
> SAS
> Identify toll calls
> Dial plan
> Flash
> PSTN calling
> Busy tone detection
> Two stage dialing
> Impedance measurement
> Caller ID(DTMF and FSK)
> Call routing

Management
> Upgradeable firmware
> Web management interface
> BSD syslog protocol (RFC3164)
> Auto provisioning
> SNTP time synchronization
> Multi-user access
> SNMP v2
> TR069

Protocols
> SIP V2.0 (RFC 3261, 3262, 3263, 3264)
> Session initiation protocol (RFC 2543) 
> Session timers(RFC 4028)
> SDP (RFC 2327)
> RTP/RTCP (RFC 1889/RFC 1890)
> NAPTR for SIP URI lookup (RFC 2915)
> STUN (RFC 3489)
> ARP/RARP (RFC 826/903)
> NTP/SNTP (RFC 2030)
> TFTP/HTTP/HTTPS for auto provisioning
> Message waiting indicator (RFC 3842)
> DHCP option for SIP servers (RFC 3361)
> DNS/DNS SRV (RFC 1706/RFC 2782)
> TR069 (TR098,TR104)
> IEEE802.1Q VLAN/802.1p/DSCP
> SNMP v2

Applications
> Supports NAT mode and bridge mode
> Supports DDNS
> MAC address cloning
> SIP proxy redundancy 
> NAT passthrough (STUN)
> Wire-speed NAT routing
> DHCP client and DHCP server
> IP conflict detection
> Port forwarding, DMZ, super DMZ
> 802.1Q VLAN/802.1p,DSCP,rate limiting
> VPN passthrough (PPTP, L2TP, OpenVPN), IPSec
> SNTP
> IGMP v2
> Firewall (DDoS attack)

Power
> AC/DC adapter
> AC Input: 100~240V, 50~60Hz
> DC Output: 12V, 1A

Operating System
> Linux 2.6.36

I/O Interfaces
> 3 x 10/100 Mbps RJ45 ports
> 2 x RJ11 FXO ports

Environmental
> Operation temperature: 0~50
> Storage temperature: -25~85
> Relative humidity: 10%~90% Non-condensing