About Dtmf Detection On Isdn-To-Ip Calls; Configuring Dtmf Settings - Cisco 3521 Administrator's Manual

Chapter 3 Configuring the Cisco IPVC 3500 Series Gateway

About DTMF Detection on ISDN-to-IP Calls

The gateway passes incoming in-band DTMF signals to the IP-side endpoint unchanged. In addition, you
can configure the gateway to convert in-band DTMF signals from the ISDN side to H.245 out-of-band
signals on the IP side.
Figure 3-3

Configuring DTMF Settings

You can enable DTMF detection and settings in the Advanced section of the Settings tab.
Procedure
In the Gateway interface, on the sidebar, click Gateway (if not already selected).
Step 1
Click the Settings tab.
Step 2
Click the Advanced button.
Step 3
Step 4 In the IP to ISDN Calls section, you can select the Translate DTMF from IP out-of-band (H.245) to
ISDN in-band (ISDN G.711 only) check box.
When selected, the gateway performs the following:
•
•
This setting is selected by default. If unselected, the gateway passes in-band DTMF signals to the
ISDN-side endpoint unchanged.
Step 5 In the ISDN to IP Calls section, you can select the Duplicate DTMF signal from ISDN side as
out-of-band on IP side check box.
When selected, the gateway performs the following:
Administrator's Guide for Cisco IPVC 3521 BRI Gateway, Cisco IPVC 3526 PRI Gateway, and Cisco IPVC 3540 PRI Gateway
OL-7995-01
Figure 3-3
ISDN-to-IP DTMF Processing
Duplicate DTMF from ISDN in-band as IP out-of-band (H.245)
Disabled
ISDN IP
In-band
Gateway
Converts H.245 out-of-band DTMF signals coming from the H.323 IP-side endpoint to in-band
signals on the ISDN side.
Passes incoming in-band DTMF signals to the ISDN-side endpoint unchanged.
illustrates ISDN-to-IP DTMF processing.
In-band In-band
Configuring Gateway Settings
Enabled
ISDN IP
H.245
out-of-band
In-band
Gateway
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