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The Grandstream HT503 HandyTone 503 is a hybrid Analog Telephone Adapter (ATA)and VoIP Router. It features both an FXS (analog telephone) port and an FXO (PSTN) Port so you can have backup lifeline support using the PSTN in the case of a power outage. It also integrates 2 10/100 RJ45 ports with an integrated high performance NAT router. The HT503 includes a status LED indicator for power, telephone, PSTN line, network, and Message Waiting Indication.
The Grandstream HandyTone HT503 VoIP Adapters/IAD series offers a comprehensive line of affordable VoIP access devices based on Grandstream's innovative and proprietary technology platform.
The Grandstream HT503 offers the entry-level IP Telephony user superb audio quality, rich functionalities, interoperability with the leading 3rd party VoIP providers, and compatibility with most service providers.
A compact Grandstream Handytone model, the HT503 is compact, works with any PSTN or cordless phone and fax machines and offers the simplicity of plug and dial, making it ideal for the basic IP telephony user.
Check out these other Grandstream VoIP adapters:
Q: I have a VOIP phone line. Is there an adaptor available to use with an antique phone (ROTERY DIALING, RINGER BOX) ?
A: Good Morning,
Yes we offer many different adaptors to convert analog to VoIP. the Grandstream HT502 is available and will work with a ringer box. Below is the link to the page
http://www.voip.com.vn/voip-adapters
Q: Hi,
I have an analog pbx and I like to extend one of my current pbx extensions to a branch office natively in another city, is there an ATA that will allow this extension to ring the remote phone and viceversa, without the need of a sip account by a third party.
Thank you.
A: You might be able to use 2 ATAs that point SIP traffic towards each other with port forwarding rules through your firewalls.
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