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Alarm Issues & Other Devices

Using alarms over a VoIP connection can be difficult and some alarm equipment will just not work consistently.  Fortunately, VoIP has made such in roads into the mainstream that alarm companies have acknowledged that in order to meet the demands of technology, must work on making products that work over a VoIP connection.  Credit card machines and other equipment that use a dial up modem to communicate likewise are difficult to get to work consistently over VoIP, but there are a few settings that can be made which might make a positive difference.

Alarms over a VoIP connection.

Integrating an Alarm system with VoIP.

Alarm companies are currently coming to grips with the realization that they will need to make their services work with VoIP.  Some companies can get their equipment to make the necessary communications and line seizure, but some have not and will not support the service over VoIP.  The only way to know for sure is to call your alarm professional.  Additionally, introduction of voltages into a telephone line connected to VoIP can interfere with the VoIP connection and cause unwanted issues.  In the event that you experience dropped calls or other issues with line quality, and have an alarm system integrated into the same wiring, try to connect a phone directly to the VoIP device, as a test to make sure that the alarm is not causing unusual behavior for your VoIP connection.  If the issue stops occurring, then it could be a result from voltage introduced by the alarm system.

Credit Card machines over VoIP.

Dial-up Modems, Credit Card machines and Tivo.

When getting business VoIP a copper line for credit card machine and fax my be a choice.Unfortunately, these devices have problems and may not work with any consistency over a VoIP connection if they have dial up modems.  The codecs used by ATAs have been designed to compress voice, not the analog signals sent and received by modems.  (Some users have had limited success by slowing down the transmission rates to very slow speeds, but the network connections would need to be very stable and a G711 codec supported.  Some older machines are being used with some success, probably because they have slower BAUD rates.)  In the case that your equipment has a dial up modem making the phone connection we have put together some possible things to try.  One suggestion to try would be the following:

Try the code (*99) which can help with modems working over VoIP.  In some ATAs (The PAP2T does not have this setting.) there is a setting called "Modem Line Toggle Code".  The default is *99 and this code would need to be pre-dialed before using the modem device.

In the case of Tivo, some people have had limited success by making the following changes:

  • Make sure that your ATA connection is set to use the G711 codec.  (This codec is uncompressed and in some cases is referenced to 90kbps, as that is the approximate bandwidth needed.)
  • Turn off Dial Tone Detection and Phone Detection.
  • Some providers offer a dialing prefix of *99, if so use this setting.
  • Try other dial in numbers.  (Some Tivo users say that they have better success with certain numbers rather than others.)  To change your dial in number, change the dialing prefix from ,#319 to ,#319,,xxxx where all symbols including commas are used and the xxxx represents the actual number to dial to.

Settings to fax over VoIP for Canon fax machines.

Try these settings to for VoIP for Panasonic fax machines.

When faxing over VoIP with a Brother Fax machine make these settings changes.