©2001 Nokia Mobile Phones. All rights reserved. 49. Care andmaintenance...................4410. Troubleshooting ......46First things to check ..............46Light indicator 3 is blinking .46No tone can be heard whenyou lift the receiver ................46Call is disconnectedimmediately after answering 47Appendix: Supplementaryservices ......................... 48How the supplementaryservices work ............................48Number identification ...........48Call forwarding(Call offering) ...........................49Call waiting(Call completion) .....................50In-call handling .......................50Call restriction .........................51Security options ......................53Call transfer ..............................53Abbreviations ............... 54