This is the second time that I run into this issue. A weeks back a customer called me at explained that they have a fxs card with 4 ports with 4 analogs phones connected to them.However, they cannot make simultanous calls(two phones and more cannot calls out at the same time). Once they pick up ont of the phones and dial a number, all three other phones are dead(no dialtone). The router does have one DSP module with 8 voice resources and all the phone calls out individualy, and remote site can receive simultenous call on the FXS ports!!
I thought that the fxs card was damage. As a temp fix, I moved the numbers from the fxs ports to ephone-dn number and everything was fine.
Yesterday, I had the same issue with a different site and with a different router. The only similarities between the site is that they all have 2801 with CME. Now, I am thinking that the issue may not be the card, but this customer never has spare part to swap out and they always want qucik fix. Therefore, it is real hard to investigate and find the root of an issue!
Just wondering whether someone had similar issue in the past?
Thank you all,