Polycom RealPresence 4000 Administrator's Manual page 572

Polycom® RealPresence Collaboration Server (RMX) 1500/2000/4000 Administrator's Guide
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The IVR Services - Video Services tab is displayed.
Define the following parameters:
Table 17-13 IVR Services Properties - Video Services Parameters - Invite Participants
Video Services
Dial out protocols
order
DTMF forward
duration
Click the DTMF Codes tab.
Description
Select the order of the network protocols that will be used by the
system to dial the destination number. The system will start dialing
using the first protocol, and if the call is not answered it will continue
with the second, third and fourth protocols (if they are enabled) until
the call is answered. By default, H.323 is set as the first protocol and
SIP as the second while the remaining protocols are disabled (set to
Off).
For PSTN calls, select the PSTN protocol and not ISDN.
Set PSTN before ISDN if both PSTN and ISDN protocols are
required.
Use this field when connecting to another conferencing entity with an
IVR, requiring the input of a password, destination number or ID.
Enter the number of seconds that the system will wait for the input of
additional DTMF digits such as a password or conference number.
The range can be from 10 seconds to 600 seconds. Default is 60
seconds.
Polycom, Inc.