Gigabit Color IP Phone Using the Advanced Phone FunctionsDTMFYou are allowed to send out the desired DTMF number during the conversation. Thenumber needs to be set in advance.To assign the key as DTMF:1) Choose DSS Key->Memory Key or Line Key, choose one of the keys you want tomake the assignment, there is a pull-down menu in the Type field, choose DTMFfrom the list.2) In the “Value” field, enter the specific number.3) Press Confirm button to save the changes.PrefixWhen you set up the function of prefix, press this key, the phone will be ready to makea new call, and show up the content which you’re set previously on the dial interface.And you could enter other figure and call outTo assign the key as Prefix:1) Choose DSS Key->Memory Key or Line Key, choose one of the keys you want tomake the assignment, there is a pull-down menu in the Type field, and choosePrefix from the list, and enter the number you want to show up on the dial interfacein the Value field.2) Press Confirm button to save the changesLocal GroupThe keys can be configured as Local Group key. Then pressing this key under the idlestatus, you can enter the Local Group interface.To assign the key as Local:1) Choose DSS Key->Memory Key or Line Key, choose one of the keys you want tomake the assignment, there is a pull-down menu in the Type field, and choose LocalGroup from the list.2) In the Line field, choose a Contacts or group, if you want to select a group, youmust add a group at first.3) Press Confirm button to save the changes.XML GroupThe keys can be configured as XML Group key. Then pressing this key under the idlestatus, you can enter the XML Group interface.