I had to reset a KX-TA824 to factory default. I have configured DISA with an OGM that lists the extensions. When a caller dials an extension during OGM it rings that extension for 10 secs per the DISA timer setting. Then it rings all extensions for 2 rings before transferring to the dialed extensions voicemail on the KX-TA50. How do I turn off the "ring all" that is happening after the extension is rang 2 times and before the VM transfer?