5.1.3 OperationPROBLEM PROBABLE CAUSE SOLUTION• Cannot set the IPaddress, subnet maskaddress, and PBX IPaddress to the IP-PT.• An unusable value isbeing set.• Set an IP address within the valid range.IP address of the IP-PT/PBX: "1.0.0.0" to"223.255.255.255" Subnet mask address:"0–255.0–255.0–255.0–255" (except0.0.0.0 and 255.255.255.255)• Cannot register theIP-PT.• The necessary networkparameters are not setto the IP-PT.• When not using a DHCP server, set the IPaddress, subnet mask address, and enterthe PBX IP address. If necessary, alsoenter the IP address of the defaultgateway.• When using a DHCP server, enter thePBX IP address.• The IP-PT cannotconnect to the PBX.• The wrong IP address,subnet mask address,PBX IP address, ordefault gatewayaddress was entered.• Check each parameter and enter thecorrect value.• The Ethernet cable isnot connectedcorrectly.• Check the Ethernet cable connections.• The DHCP server is notactive.• Restart the DHCP server.• Disable DHCP and re-enter settings asappropriate.• Whenever you try tomake calls using a SIPExtension, a busy toneis heard.• The status of the portthat the SIP Extensionis connected to is Out ofService.• Change the port status from Out ofService to In Service using theMaintenance Console.• When using thespeakerphone on anAPT, nothing is audible.• The HANDSET/HEADSET selector isset to the "HEADSET"position.• When the headset is not used, set theHANDSET/HEADSET selector to the"HANDSET" position.• When using thespeakerphone/monitormode with a DPT,nothing is audible.• The "HEADSET" modeis selected by PersonalProgramming,"Handset/HeadsetSelection".• When the headset is not used, select the"HANDSET" mode by PersonalProgramming.• The PT does not ring. • The ringer volume is off. • Turn on the ringer volume.Document Version 2011-10 Installation Manual 1615.1.3 Operation
