User's Manual

X= 0dB - 20dB (1dB step or less)
(This value is relative value to reference AGC output level)
5.7.8 AGC for recording
The product shall have the following AGC circuit for recording the message.
• Attack time ----------- “X”
• Decay time ----------- “Y”
• Line input level versus AGC output
Input level ------ 0dBm - -40dB
AGC output level needs to be less than 6dB level changing
It is better to have the AGC level control starting level “Z” setting.
“X”, “Y” and “Z” are defined by EEPROM
X= 50ms -300mS (10ms step or less)
Y= 100mS - 2000ms (10ms step or less)
Z= -30dB - -40dB (1dB step or less)
(“Z” is line input level)
5.7.9 Audio out put level setting
The product shall have the following independent level control setting by EEPROM.
• Voice prompt playback audio output level for Base speaker (Volume control position “5”)
• Voice prompt playback audio output level for the line
• Voice prompt playback audio output level for Handset
• Recorded message playback audio output level for Base speaker (Volume control position
“5”)
• Recorded message playback audio output level for the line
• Recorded message playback audio output level for Handset
• Supervisory tone audio output level for Base speaker (Volume control position “5”)
• Supervisory tone audio output level for the line
• Supervisory tone audio output level for Handset
5.7.10 Supervisory tone
The characteristics of the main tone shall be as follows.
• Level ------------------------ defined by section 5.8 setting
• Frequency ----------------- 1400Hz +/- 50 Hz
• Duration defined by ----- individual product MMI specification
5.7.11 Tail cut
The product shall have the setting for define the tail cut length for detecting the silence or network tone
during recording the message.
5.7.12 Ring signal detection
The product shall detect the Ring signal with the following conditions.
• Detection frequency --------- 13.5 Hz - 70Hz
• Ring ON detection period -------- “X” ms
• Ring OFF detection period ------ “Y” ms
• Call hung up the telephone ------ “Z” ms
(If product detect Ring ON and Ring OFF then it will count ‘1 cycle of Ring input“)
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