SD Memory CardsIssue Possible Cause & Solution ReferenceI cannot record to the SDmemory card.• The SD memory card is not compatible with the unit.→ Make sure that you are using a compatible SD memorycard. (SDHC, miniSDHC, and microSDHC memory cardsare not compatible with the unit.)page 29• The SD memory card is not formatted or was not formattedproperly.→ Format SD memory cards for use with this unit in FATformat (FAT16) using a computer.page 30• The SD memory card was not inserted properly.→ Make sure that the SD memory card is inserted properlyby gently pushing it securely but gently toward the back ofthe SD memory card slot.page 29PhonebookIssue Possible Cause & Solution ReferenceI cannot add or edit entriesto the phonebook.• You are on a call or playing back recordings.→ You cannot add or edit phonebook entries while on a callor while playing back recordings.—• The "Operation Mode" setting is not correct.→ Change the setting to "Peer to Peer" if you want to addor edit peer to peer IP call entries (i.e., entries stored byspecifying the called party's IP address).→ Change the setting to "IP-PBX" if you want to add or editIP call entries that will be called when using the unit as aSIP extension of the connected PBX.page 28• A call is being received.→ The unit exits the phonebook automatically when a call isreceived. Add or edit the phonebook entry again once youhave finished the call.—• There are 100 entries in the phonebook.→ The phonebook is full. Erase any unnecessary entries. page 39Document Version 2010/02 Operating Instructions 69Troubleshooting