We have a asterisk PBX whit a TDM2404E card, grandstream gxp-2000 ip phones connected, and linksys (SPA2002) ATA’s with analog phonnes connected.
The analog phones works great, but the grandstream phones works very bad, thay have a big noise and problems of cut voice. This same succes whit the softphone; someone know what happend or has had problems like this?