Hello all, I have an IP Phone on Inside, the IP Call Manager is located on the dmz, all the the ports are open between this two devices (permit IP), moreover, I can ping one device to another. But the Ip phone is unable to make a call, no dial tone. ...

Hi all, We have an AS5850 registered with a softswitch using MGCP, but the AS5850 is sending this message:Dec 28 20:49:48.137: send_mgcp_msg, MGCP Packet sent to 200.75.xx.xx:2727 --->Dec 28 20:49:48.137: 500 121454 Endpt UnknownHere is the AS5850 co...