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M
Malfunctions, hardware ............................ 8-1
Manual, use of ................................... 1-1
Memory dial keys ................................ 2-2
Memory dial keys, entering of ...................... 3-12
Memory dial keys, erasing of ...................... 3-12
Memory dial keys, examining of .................... 3-12
Memory dial keys, labeling of ...................... 3-13
Memory dial keys, use of .......................... 3-13
Message display, contrast adjustment ................ 2-6
Messages, display ................................ 2-4
Miscellaneous errors ............................. 8-13
Models and Accessories, overview ................... 9-1
Models and Accessories, descriptions of ............... 9-9
Modem Diagnostics ............................... 8-2
Multiline model .................................. 9-3
N
No dial tone ..................................... 8-2
0
Off-hook Data protocol changes ..................... 6-6
Ordering information ............................. 9-11
p
Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Plain old telephone ................................ 8-1
Poor quality sound ................................ 8-2
Power requirements ............................... 1-5
Prompt messages ............................ 2-6, A-4
s
Secure call errors ................................. 8-5
Secure communication, STU 111/SECTEL 1000 ......... 4-2
Secure communication, STU"lll/SECTEL 2000 ......... 4-3
Secure mode calls, converting clear to secure .......... 5-2
Secure mode calls, receiving auto secure calls .......... 5-6
Security considerations ............................ 4-1
Security procedures ............................... 4-1
D-3
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