Using Automated Phone Systems with
Voice-Over-Internet (VoIP)
Automated phone systems may encounter problems detecting dialtone for outbound calls, incoming ring, or caller-hangup, when using it on a VoIP line.
There are known compatibility issues with the following equipment...
- VoicePro PBX: VP206, VP408 or VP412
- Alarm systems
- DIRECTV®
- Tivo®
Solution: You need to have a compatible VoIP adapter...
If you have problems finding an available line to make outbound calls, or dropping calls during a conversation, it is not the fault of your automated equipment. Your VoIP adapter may not be using the standard 48 Volts DC. The Linksys adapter, for example, has a slightly lower voltage.
In some cases, inbound calls are not detected with the Linksys adapter. Linksys uses the European 25 Hz ringing signal at 60 VAC, which may not be detected.
Some other adapters are also known to have similar issues. If you have any of these problems, ask your VoIP provider to give you the Motorola VT1005V adapter.
If you have the optonline VoIP service from Cablevision, make sure you have the Motorola SBV5120 broadband modem. This is also compatible with the Voice Pro.
Motorola rings with the normal 20 Hz signal at 60 VAC, so inbound calls will be detected. Motorola provides the standard 48 Volts DC on idle lines, so an available outside line can be found to make calls.
Software Programming Solutions...
- If you have trouble detecting incoming calls, ask your VoIP provider if they can program their adapter to provide a normal 20 Hz ring signal.
- If you have trouble seizing an outside line to make calls, ask if they can set it to provide 48 Volts DC.
If your only problem is dialing out, dedicate a regular POTS line for outbound calls and program the phone system to use that line for outbound calls.
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