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GS-HT503-6pk
Grandstream HandyTone HT503 1 FXS telephone port (RJ11), BUNDLE of 6
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
Dual 10/100 Mbps network ports (RJ45) with integrated high performance NAT router
Status LED for power, telephone, PSTN line, network, and message waiting indication
Advanced telephony features
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