7.1 Troubleshooting7.1.1 InstallationPROBLEM PROBABLE CAUSE SOLUTIONYou cannot make/receivecalls via an IP network.• DSP card malfunction • Replace the corresponding card.• Mother boardmalfunction• Replace the mother board (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/CAT 5ecables in use are over 100 m 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 phones do notoperate.• DSP card malfunction • Replace the corresponding card.• Mother boardmalfunction• Replace the mother board (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 phone notregistered• Register the corresponding IP-PT/SIPphone.• IP-PT/SIP phonemalfunction• Replace the IP-PT/SIP phone.• Poor connection • Make sure that an 8-pin twisted pair cableis used for connection.• Make sure that none of the CAT 5/CAT 5ecables in use are over 100 m 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 phone is notblocked by the firewall or other networkdevices.292 Installation Manual7.1.1 Installation
