Compatibility
Whozz Calling? units work with either analog phone lines or digital/VoIP lines converted to analog by a device installed at a customer premise. The diagrams and chart below should help you determine the compatibly of your phone system to our products. Contact us for more information regarding your specific requirements.
Analog Converted VoIP
Many varieties of VoIP service incorporate a VoIP-to-Analog conversion unit so that their customers do not need to replace existing telephony equipment. Whozz Calling? units function properly with these conversion devices. Analog conversion devices are also supplied by fiber optic phone providers (FiOS) and cable phone service providers (Comcast, Charter).

Whozz Calling? units work with these systems since the VoIP or Digital phone service is converted to analog service at the customer’s location.
Hosted VoIP
If you use special SIP/VoIP phones that connect to your local area network (LAN), Whozz Calling? units will not work properly unless Analog Terminal Adaptors (ATAs) are added. They will need to be configured correctly by your service provider. We plan to introduce a VoIP Caller ID unit soon that will be connected directly to the LAN designed for use with Hosted VoIP and SIP Trunking.

Whozz Calling? units work with these systems only if Analog Terminal Adapters (ATA’s) are installed at the customer’s location by the service provider. Please contact us for more information.
Compatibility Chart
Depending on the type of phone line and the particular unit installed, it may be compatible with only inbound Caller ID, or both inbound and outbound Caller ID.
|
Phone Service Type |
Inbound |
Outbound |
Unit |
|---|---|---|---|
|
Standard Local Loop (1FB) |
Yes |
Yes |
Basic or Deluxe |
| Analog Centrex | Yes |
Yes |
Basic or Deluxe |
|
Ground Start |
Yes |
Yes |
Basic or Deluxe |
|
Fiber or Cable |
Yes |
Yes |
Basic or Deluxe |
|
T1 w/ Analog Converter |
Yes |
Yes |
Basic or Deluxe |
|
VoIP – Analog Converted |
Yes |
Yes |
Basic or Deluxe |
|
VoIP – Hosted |
Yes |
No |
Basic only |
|
VoIP – Hosted |
Presently, No | Presently, No | Future Product |
|
VoIP – SIP Trunking |
Presently, No | Presently, No | Future Product |
|
ISDN PRI, Dedicated T1, |
Not Compatible | Not Compatible | Not Compatible |
In order to capture Caller ID, an analog Caller ID signal must present on the phone line. This signal can be sent directly from the phone company or a digital/VoIP-to-analog converter can generate analog Caller ID signals. Analog Caller ID will not pass through telephone switches to extension lines. Units will not operate if directly connected to digital phone lines.

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