User guide

118 SCOPIA 400/1000 Gateway User Guide
Configuring Gateway Settings
ABOUT DTMF
DETECTION ON
IP-TO-ISDN OR
SERIAL CALLS
The Gateway passes incoming in-band DTMF signals to the ISDN or serial-side
endpoint unchanged. In addition, you can configure the Gateway to convert
H.245 out-of-band DTMF signals from the IP side to in-band signals on the
ISDN or serial side. Figure 3-2 illustrates IP-to-ISDN or serial DTMF
processing.
Figure 3-2 IP-to-ISDN or Serial DTMF Processing
Table 3-17 DTMF Tone Assignments
1209 Hz 1336 Hz 1477 Hz 1633 Hz
697 Hz
1
ABC
2
DEF
3A
770 Hz
GHI
4
JKL
5
MNO
6B
852 Hz
PRS
7
TUV
8
WXY
9C
941 Hz
*
oper
0#D
ISDN or Serial IP
in-band
in-band
ISDN or Serial IP
H.245 out-of-
band
in-band
in-band
Duplicate DTMF signal from ISDN or Serial side as out-of-band on IP side
Unchecked
Checked