SIP registered but calls drop out

[rolly23]

I'm trying to use a Dlink DPH-C160s with Trixbox 2.2.
I can get the phone to register but when I try to call it from one of our other extension the phone just beep..beep..beep and the extension keeps trying to ring it.
But if I try calling an extension with it, the call just ends.
Has anyone got any ideas on what to start to look for or check what settings?

[rejil.rajan]

Such an issue occurs only if the phone is not properly registered to the device. What I would advise is check your phone settings again

In the asterisk console, give the command

sip show peers

and check if the IP address of that device is visible