1 FXS telephone port (RJ11), 1 FXO PSTN line port (RJ11) with power-outage life line support;Up to 2 SIP account profiles, SIP over TCP/TLS, SRTP;Status LED for power, telephone, PSTN line, network, and message waiting indication;Advanced telephony features;Secure and automated provisioning using HTTP/HTTPS/Telnet/TFTP

• Grandstream HandyTone HT503 1 FXS telephone port (RJ11), BUNDLE of 2

Grandstream HandyTone HT503 1 FXS telephone port (RJ11), BUNDLE of 2Grandstream