Cisco 3521, Руководство администратора

Страница: 88 / 137

3-26
Administrator’s Guide for Cisco IPVC 3521 BRI Gateway, Cisco IPVC 3526 PRI Gateway, and Cisco IPVC 3540 PRI Gateway
OL-7995-01
Chapter 3 Configuring the Cisco IPVC 3500 Series Gateway
Configuring Gateway Settings
Auto dial voice call in case of video call fail Select to instruct the gateway to attempt to
reconnect video calls as voice calls after a video
call has failed at call setup. The gateway uses the
auto-redial mechanism for outgoing video calls
when any of the ISDN disconnect reasons listed
below occur.
When selected, the gateway first tries to redial the
call as a restricted video call at 56 Kbps. If the call
fails for any of the reasons listed below, the
gateway tries to redial the call as a voice call.
When unselected, the call disconnects.
The gateway log indicates both the disconnect
reason and the gateway attempt at redialing.
Note
The auto-redial mechanism operates
independently of the downspeeding
functionality.
The ISDN disconnect reasons are:
• 0x12—No user responding.
•
0x39—Bearer capacity not authorized.
•
0x3a—Bearer capacity not presently
available.
•
0x3f—Reports a “service or option not
available” event only when no other cause in
the “service or option not available” class
applies.
• 0x4f—Reports a “service or option not
implemented” event only when no other
cause in the “service or option not
implemented” class applies.
•
0x41—Bearer capability not implemented.
• 0x45—Requested facility not implemented.
•
0x58—Incompatible destination.
Use default service bit rate of n kbps for
services defined to use ‘auto’ bit rate
Choose the default bit rate. When using a service
with the bit rate set to
Auto , the gateway uses the
default bit rate if the received bearer rate is not
one of the supported bit rates.
ISDN to IP Calls section
Table 3-8 Advanced Settings
Field or Check Box Description