On Tue, Dec 8, 2009 at 4:01 PM, Kevin P. Fleming <[email protected]> wrote: > Andrew Latham wrote: > >> This is where my query lives... What if... Imagine 2+ E1s sharing >> the first E1's D-channel for timing and some manufacturer thought >> about selling some hardware that would allow the use of 32 channels on >> the next E1 and so on. So something like "dchan=16 >> bchan=1-15,17-31,32-63" could happen. > > The D-channels are not used for timing, the timing channels are. As far > as I am aware (but my knowledge base is limited) the 32nd channel on an > E1 cannot be used for data transfer under any circumstances. > > Please be sure you are not confusing the 32nd channel (used for timing) > with the 16th channel (used as a D-channel for ISDN PRI usage). Asterisk > already supports using all 31 available channels on an E1 as B-channels > if the D-channel signaling is coming from a different span.
Yes we are on the same page here. After some further reading I could not find a single instance (other than data) which could use the 32nd channel. I see why the DAHDI (and Zaptel) software is the way it is. The mistake I made was regarding a 32 Channel MUX which was 32 channels _of_ E1s... So the 32nd channel in an E1 should never (knocks on wood) be used by voice circuits. Is the numbering alone worth changing DAHDI? Probably not. I can even imagine users wondering why they can't do anything with this new magical 32nd channel. Sorry for the waste of time. > > -- > Kevin P. Fleming > Digium, Inc. | Director of Software Technologies > 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA > skype: kpfleming | jabber: [email protected] > Check us out at www.digium.com & www.asterisk.org > > _______________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
