TANDBERG MXP 550 - Manual (Page 22)

D1374201_User_Manual_T550_T770_MXP_CCM
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via the system Phone Book for easy
placement of calls. See chapter 3.6
Directory for details.
17. Use the red End Call key to end the
current call. See 3.5.3 Ending a Call
for details.
18. Number/Letter keys function in the
same manner as with a mobile or
cellular phone.
19. See 3.2.7 Touch Tones for details.
20. Help.
21. Configuration / Administrator settings.