The HT503 enables an integrated hybrid deployment between PSTN and VoIP environments. Users can utilize “hop-on and hop-off” calling through its FXO and FXS port that enables remote call origination and termination to and from the PSTN line. This ATA features 1 analog telephone FXS port and 1 PSTN line FXO port. Users can utilize the device for extension of a VoIP service to 1 analog phone with the FXS port. In addition to being SIP compliant, this product features support for up to 2 SIP account profiles, excellent voice quality and advanced telephony features.
