Nexotek Callisto Spark NT-B300 - Manual (Page 40)

CHAPTER 8: ADVANCED OPTIONS 37
Adaptor default channel
If you think you will be making Skype and SkypeOut calls on this phone more
frequently than regular phone calls, you will want to change the default call
setting to Internet calls. This means you will be in Internet mode instead of
landline mode when you pick up the receiver. When your default call setting is
adjusted for Internet calls, the USB LED should be on continuously to indicate so.
Leave the channel on PSTN for landline mode, or you can change it to USB for
Internet mode.
Caller ID format (FSK/ DTMF)
You may need to change the caller ID format to your phone’s default setting in
order for your Skype caller ID to show up correctly on your phone’s display.