[Asterisk-Users] "Glare" condition - How well does asterisk handle?

[Steven Critchfield]

On Tue, 2004-05-25 at 13:53, Scott Stingel wrote:
> Hi-
> 
> I have an upcoming application that requires use of PRI channels that are
> primarily used for high-volume incoming traffic, but that are to be used for
> outbound calling as well.  Of course, one option is to have dedicated
> outbound channels reserved, but this is an inefficient use of channel
> resources.
> 
> Normally PBX's are designed to have the CPE yield to an incoming call if a
> particular channel is seized by both ends at the same time (a condition
> known as "glare"), but I'm wondering if anyone has real-world experience
> with asterisk to say how well this is handled.

While I may be wrong, I don't think "glare" happens on PRI. The
difference being that the call isn't sent over a channel until there had
been communications on the D channel. This means a send and a receive.
"Glare" would happen on a channelized T1 where it is possible for each
end to try and seize the channel at the same time, since there isn't any
out of band communications.
-- 
Steven Critchfield  <critch at basesys.com>