Address
Function
Unit
Remarks
807F52
Tone attenuation value in DTMF
signals
-dBm x
0.5
Function 08 (parameter 19).
See Note 6.
807F53
Tone attenuation value difference
between high frequency tone and
low frequency tone in DTMF
signals
-Nx0.5
(dB)
Function 08 (parameter 20).
See Note 6.
807F54
PSTN: DTMF tone attenuation
level after dialling
-dBm x
0.5
Function 08 (parameter 21).
See Note 6.
807F55
to
807F58
Not used
Do not change the settings.
807F59
Grounding time (ground start
mode)
20 ms
The Gs relay is closed for
this interval.
807F5A
Break time (flash start mode)
1 ms
The OHDI relay is open for
this interval.
807F5B
International dial access code
BCD
For a code of 100:
807F5B - F1
807F5C - 00
807F5C
807F5D
PSTN access pause time
20 ms
This time is waited for each
pause input after the PSTN
access code. Up to 7 of
these can be input. If this
address contains FF[H], the
pause time stored in
address 807F4F is used.
807F5E
Progress tone detection level, and
cadence detection enable flags
Bit 7 Bit 6 Bit 5 dBm
0 0 0 -25.0
0 0 1 -35.0
0 1 0 -30.0
1 0 0 -40.0
1 1 0 -49.0
Bits 2, 0 - See Note 3.
807F5F
Polarity detection
Bit 4 1: Enable: Tx Polarity detection
Bit 5 1: Enable: Rx Polarity
detection
807F60
to
807F64
Not used
Do not change the settings.
807F65
Intercity dial prefix (HIGH)
BCD
For a code of 0:
807F65 - FF
807F66 - F0
807F66
Intercity dial prefix (LOW)
BCD
807F67
to
807F71
Not used
Do not change the settings.
SERVICE TABLES AND PROCEDURES
May 22nd, 1995
NCU PARAMETERS
4-48