asterisk users - Dec 2013 - [OT] Does Energy Savings mode exist with BRI/PtP ?

Hello,

I always thought that Energy Savings mode existed with ISDN Basic Rate
Interface in Point -to-multi-Point but it didn't with Point-to-point.

Is this correct ?
Have you ever met a public PSTN switch configured to "cut" B ISDN
channels
in Point-to-point.signalling ?

Regards.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.digium.com/pipermail/asterisk-users/attachments/20131211/4b27f6a6/attachment.html>

Yes, I can confirm that. P2P always requires a PBX and you can easily build up
trunks of P2P
connections. So all channels always need to work in a coordinated way, if you
allow this sloppy
formulation. Another reason for not allowing the energy saving mode is probably
that in some
countries part of the phone number resolution has to happen inside the pbx on
the customer side.
This could be a problem if it takes too much time to wake up a device, or if the
state of the
connection cannot be determined beforehand.

P2MP does have an energy saving mode which depends on the PSTN and on the TE
device. Sometimes
phone companies allow special sequences (like *121#) that explicitly allow to
disable the energy
saving mode, if the P2MP connection is connected up to a PBX. Some customer
devices have
configuration options like "connect to a pbx" which send exactly this
sequence to the next
telephone switch.

All the technicals docs are available online, but I have yet to find a person,
myself included,
who actually read them all. All of this applies to Western Europe, only.