On 09/29/2011 12:22 PM, Tim Nelson wrote:> Greetings-
>
> From time to time, I find myself working with (or customers working with)
"dynamic T1s". They are typically standard T1s that terminate to an
Adtran device which utilizes the channels for data (64kbps X 24) until a call is
pushed inbound/outbound on the circuit. One data channel is automatically peeled
off the circuit (removing 64kbps from total data throughput capacity), and
reallocated as a voice channel.
>
> Is it possible for Asterisk/DAHDI to handle a situation such as this? If I
recall, DAHDI does have some data functions to it, but I'm not sure if it
can handle the circuit as data (presented to kernel for iptables routing/nat),
and/or if it can automagically reallocate channels for voice usage on the fly.
There are methods of peeling off channels dynamically to be used as data
channels (PPP/RAS style), but not the other way around to my knowledge.
Once an HDLC network link has been setup in the kernel's HDLC layer, I
don't believe it can be shrunk or grown.
--
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
Jabber: kfleming at digium.com | SIP: kpfleming at digium.com | Skype: kpfleming
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at www.digium.com & www.asterisk.org