DTMF Method RFC2833 and/or SIP INFO

QoS Layer 2 (802.1Q VLAN/802.1p) and Layer 3 (ToS, Diffserv, MPLS)

Caller ID Bellcore type 1 & 2, ETSI, BT, NTT and DTMF-based CID

Network Protocols TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS, ARP/RARP, ICMP, DNS, DHCP, NTP, TFTP, TELNET, PPPoE, STUN

Telephone Interfaces 1 FXS telephone port (RJ11), 1 FXO PSTN line port (RJ11) with lifeline support /Network Interfaces Two (2) 10/100Mbps ports (RJ45) with integrated NAT router and auto-detection and support for either straight through or crossover cables

Telephone Interfaces 1 FXS telephone port (RJ11), 1 FXO PSTN line port (RJ11) with lifeline support

LED Indicators Power,WAN, LAN, PHONE and LINE

Operational: 32° ~ 104°F or 0° ~ 40°C; Storage: -10 ~ 130°F Humidity: 10 – 90% non condensing

گرنداستریم-Grandstream

Media SRTP /Control TLS/SIPS/HTTPS /Management Syslong support, telnet, remote management using web broswer

Telephony Features Caller ID display or block, call waiting, flash, blind or attended transfer, forward,hold, do not disturb, 3-way conference

The HT503 is an analog telephone adapter featuring 1 analog telephone FXS port and 1 PSTN line FXO port in order to offer backup lifeline support using a PSTN line. The integration of a FXO and FXS port enables remote call origination and termination to and from the PSTN line, known as hop-on and hop-off calling. The 1 FXS port allows for extension of a VoIP service to 1 analog phone.

Voice Codecs G.711 with Annex I (PLC) and Annex II (VAD/CNG), G.723.1A, G.729A/B/E, G.728, G.726-40/32/24/16, Ilbc /Fax Over IP T.38 compliant Group 3 fax relay up to 14.4kbps, Fax datapump V.17, V.19, V.27ter,V.29 for T.38 fax relay

Grandstream HT503 ATA

Provisioning and Control UPnP, HTTP, HTTPS, TELNET, TFTP, TR069, secure and automated provisioning using AES encryption, syslog

Universal Power Supply Input: 100-240VAC, 50-60Hz

500 g