Equipment VoIP

Create a second directory number and user for the Nightringer extension. You may need to fudge a digit of the MAC Address so that Call Manager allows you to associate it to the new user. Be sure [...]

Adjust the switch power selection to Power inline static, as opposed to Power inline dynamic. This will allow the device to continuously receive 15.4W of power.

According to Dell: Flow Control Support (IEEE 802.3X): Flow control enables lower speed devices to communicate with higher speed devices by requesting that the higher speed device refrains from [...]

If connected to a Linksys SRW208MP switch, the Guardian device stays up. Pantel, Cisco, or Linksys PoE endpoints all work on the Dell Powerconnect 3524P. A user tried hard coding the switch [...]

This happens because with default settings, the switch port is resetting power too quickly. Therefore, on the 3550 switch, on the switch port that the unit is attached to, please try adding the [...]

This High PIV Ultra Fast switching diode prevents CEMF kick back from an intermediary relay coil when power is cut and the coil field collapses. You could use an On-Semi MUR105 diode or an [...]

Guardian Telecom VoIP units feature a built-in “fail safe” mechanism. The Device will store the “TFTP Server IP” and “New Filename” entered on the “Update Firmware” web page. If, during the boot [...]

RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, mono 8000 Hz You can use the free utility ‘Audacity’ (http://audacity.sourceforge.net/) to convert audio files into a format the [...]

In the PBX setup page for the extension of the Guardian device, find the Qualify= value and change it to NO. If the Qualify= value requires a numeric value, then change it to 0. Note that on some [...]

This is a common problem when the re-registration time value is not set correctly. On a Guardian VoIP device, you need to make sure that the re-registration time value (in minutes) is less than [...]

Make sure your SIP phone is set to 101 for the DTMF payload type (Out of Band RFC2833).

Since the relay test button is working, it seems like the problem results from interfacing with the IP phone where the DTMF tone is generated. To resolve this problem verify that the DTMF tone on [...]