5.1 Troubleshooting5.1.1 InstallationPROBLEM PROBABLE CAUSE SOLUTIONYou cannot make/receivecalls via an IP network.• IP-EXT/IP-GW/DSPcard malfunction• Replace the corresponding card.• IPCMPR cardmalfunction• Replace the IPCMPR card (be sure to turnoff the PBX when replacing).• Not enough activationkeys• Purchase additional activation key codes.Please consult a certified dealer fordetails.• Poor connection • Make sure that an 8-pin twisted pair cableis used for connection.• Make sure that none of the CAT 5 cablesin use are over 100 m (328 ft) in length.• Make sure that a straight cable is used forconnection to a switching hub.• Network malfunction • Make sure that all network devices in useare switched on.• Make sure that there is no unwantedfirewall in the IP network.IP-PTs/SIP Extensions donot operate.• IP-EXT/DSP cardmalfunction• Replace the corresponding card.• IPCMPR cardmalfunction• Replace the IPCMPR card (be sure to turnoff the PBX when replacing).• Not enough activationkeys• Purchase additional activation key codes.Please consult a certified dealer fordetails.• IP-PT/SIP Extensionnot registered• Register the corresponding IP-PT/SIPExtension.• IP-PT/SIP Extensionmalfunction• Replace the IP-PT/SIP Extension.• Poor connection • Make sure that an 8-pin twisted pair cableis used for connection.• Make sure that none of the CAT 5 cablesin use are over 100 m (328 ft) in length.• Make sure that a straight cable is used forconnection to a switching hub.• Network malfunction • Make sure that all network devices in useare switched on.• Make sure that the IP-PT/SIP Extensionis not blocked by the firewall or othernetwork devices.156 Installation Manual Document Version 2011-105.1.1 Installation
