Cisco Cisco Expressway Wartungshandbuch
Field
Description
Usage tips
Port on B2BUA
for transcoder
communications
for transcoder
communications
The IP port used on the B2BUA for
communicating with the transcoders. Default is
65080.
communicating with the transcoders. Default is
65080.
All transcoder communications are carried
out over TLS.
out over TLS.
Use transcoder
policy rules
policy rules
Specifies whether the transcoder policy rules
are used to control access to the transcoders.
Default is No.
are used to control access to the transcoders.
Default is No.
If Enable transcoders for this B2BUA is
Yes, then all calls are routed via the
transcoders by default.
Yes, then all calls are routed via the
transcoders by default.
If transcoder resources need to be
reserved for specific types of calls, you
can use this option to limit the types of
calls that are routed via the transcoders.
Set this option to Yes and then define the
required
reserved for specific types of calls, you
can use this option to limit the types of
calls that are routed via the transcoders.
Set this option to Yes and then define the
required
TURN
section:
Offer TURN
services
services
Controls whether the B2BUA offers TURN
services. Default is No.
services. Default is No.
This is recommended for calls traversing a
Microsoft Lync Edge server.
Microsoft Lync Edge server.
To configure the associated
TURN servers, click
TURN servers, click
Advanced settings
: you should only modify the advanced settings on the advice of Cisco customer support.
Encryption
Controls how the B2BUA handles encrypted
and unencrypted call legs.
and unencrypted call legs.
Required: both legs of the call must be
encrypted.
encrypted.
Auto: encrypted and unencrypted combinations
are supported.
are supported.
The default is Auto.
A call via the B2BUA comprises two legs:
one leg from the B2BUA to a standard
video endpoint, and one leg from the
B2BUA to the Lync client. Either leg of the
call could be encrypted or unencrypted.
one leg from the B2BUA to a standard
video endpoint, and one leg from the
B2BUA to the Lync client. Either leg of the
call could be encrypted or unencrypted.
A setting of Auto means that the call can
be established for any of the encrypted
and unencrypted call leg combinations.
Thus, one leg of the call could be
encrypted while the other leg could be
unencrypted.
be established for any of the encrypted
and unencrypted call leg combinations.
Thus, one leg of the call could be
encrypted while the other leg could be
unencrypted.
B2BUA media
port range
start/end
port range
start/end
The port range used by the B2BUA for handling
media. Default range is 56000–57000.
media. Default range is 56000–57000.
Ensure that the port range does not
overlap with other port ranges used by this
Expressway or this Expressway's TURN
server.
overlap with other port ranges used by this
Expressway or this Expressway's TURN
server.
Hop count
Specifies the Max-Forwards value to use in SIP
messages. Default is 70.
messages. Default is 70.
Session refresh
interval
interval
The maximum time allowed between session
refresh requests for SIP calls. Default is 1800
seconds.
refresh requests for SIP calls. Default is 1800
seconds.
For further information see the definition of
Session-Expires in
Session-Expires in
.
Minimum
session refresh
interval
session refresh
interval
The minimum value the B2BUA will negotiate for
the session refresh interval for SIP calls. Default
is 500 seconds.
the session refresh interval for SIP calls. Default
is 500 seconds.
Port on B2BUA
for Expressway
communications
for Expressway
communications
The port used on the B2BUA for communicating
with the Expressway. Default is 65070.
with the Expressway. Default is 65070.
Port on B2BUA
for Lync call
communications
for Lync call
communications
The port used on the B2BUA for call
communications with the Microsoft Lync server.
Default is 65072.
communications with the Microsoft Lync server.
Default is 65072.
Cisco Expressway Administrator Guide (X8.5)
Page 191 of 394
Applications
B2BUA (back-to-back user agent) overview