I have a quadro 2xi with latest 5.0.19 firmware.
I have this 2xi for more than 1 year and everything was fine but lately all Linksys SPA 921 phones have an issue when dialing out. When we call another pbx and the automated message says, Press 1 to sales, press 2... we press "1" and nothing happens. The weird thing is that there is a Grandstream 2000 in our office and that one works fine. The problem occurs to all linksys phones.

The 2 things I changed lately was:

1) upgrade to 5.0.19
2) Install this Grandstream 2000
3) Changed some settings in order to support monitoring of lines and some extensions to grandstream.

Any idea?