
IPV20 TECHNICAL REFERENCE & INSTALLATION GUIDE
18
RING CADENCES*
1. External Call, Call Back,
Reminder/Wake Up Calls
1500 msec on, 3500 msec off
2. Internal Call
400 msec on, 350 msec off, 400 msec on,
3500 msec off
*These values can be changed via the programming interface.
DTMF TONES:
High Frequency Group (- 7 dBm)
1209 Hz
1336 Hz
1477 Hz
Low 697 Hz
1
2
3
Frequency 770 Hz
4
5
6
Assembly 852 Hz
7
8
9
( - 9 dBm) 941 Hz
*
0
#
The Nominal Frequencies of the IPV20 may deviate, by
±
2.5 %, from the values
listed above.