參數(shù)資料
型號： SA589
廠商： SAMES
英文描述： LD/DTMF SWITCHABLE DIALLERS WITH DEDICATED KEYS FOR 20 MEMORIES
中文描述： 勞工處/雙音多頻撥號器可切換20個記憶諾基亞N93
文件頁數(shù)： 10/14頁
文件大?。?/td> 94K
代理商： SA589
SA589 FAMILY
sames
10/14
TABLE 3: Tone Frequencies
Keypad
R1
697
-0.07
R2
770
-0.10 +0.19 -0.15 -0.17
R3
852
R4
941
C1
1209
C2
1336
-0.20
C3
1477
-0.22
C4
1633
-0.31
Nominal frequency (Hz)
Deviation from nominal (%)
NOTE:
There will be an additional frequency error caused by any deviation of the resonator
frequency from the nominal 560kHz.
LOOP DISCONNECT DIALLING
The MASK output is provided in order to disable the speech circuit during LD dialling.
Consequently the MASK output is normally at logic '1' in the off-hook condition, but changes
to logic '0' during LD dialling. MASK also changes to logic '0' in order to signal a Timed Break
Recall (Flash) to the line.
Both MUTE and MF OUT remain low during LD dialling. LD dialling is signalled on the IMP
output. A break is signalled by a logic '0'. Make periods and IDP times are signalled by a logic
'1'. When not dialling, the IMP output sits at logic '0'.
Fig. 6 LD mode timing diagram
KEY PRESS
COLUMN
ROW
MASK
IMP
MUTE(LOW)
MF OUT
"5"
"8"
"TBR"
"IDP"
2 . 2 3 4 0
ON HOOK TIME OUT
HOOK SWITCH
"5"
"8"
D R - 0 0 6 8 8
"9"
(PARTIAL)
"9"
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