All This is a small issue that I stumbled onto that has to do with the channel numbering on an E1 connection into an Asterisk Zaptel/DAHDI system.
As most of us already know an E1 has 32 channels of which 30(1-15 17-31) are B-channels and 1 (16) is a D-Channel. The 32nd channel is not presented in Asterisk Zaptel/DAHDI. There are other configurations but this is the most common. *** Everything currently works and the community is humming along with the current implementation. *** Is it or would it be worth the time to note the 32nd channel of the E1? I noticed this issue on a 4 port card with 4 E1s. I quickly expected the last B-channel at 127 where it was actually at 124 (my first time with E1s). As telcom lingo goes I have seen this 32nd channel referred to as "time slot 0" and as "framing channel" and expect there to be other names as well. As an example, the current method: bchan=1-15 dchan=16 bchan=17-31 ... bchan=32-46 dchan=47 bchan=48-62 ... bchan=63-77 dchan=78 bchan=79-93 ... bchan=94-108 dchan=109 bchan=110-124 and an example of my first thoughts: bchan=1-15 dchan=16 bchan=17-31 uchan=32 ... bchan=33-47 dchan=48 bchan=49-63 uchan=64 ... bchan=65-79 dchan=80 bchan=81-95 uchan=96 ... bchan=97-111 dchan=112 bchan=113-127 uchan=128 I quickly grabbed the "uchan" to mean "Unused" or "Unallocated". I am going to assume that there are some better ideas and names for this. One thought was "Framing" or "fchan" which does not exactly describe the channel. I did notice that depending on your locale the channel had several names. What are your ideas? ~ Andrew "lathama" Latham [email protected] * Learn more about OSS http://en.wikipedia.org/wiki/Open-source_software * Learn more about Linux http://en.wikipedia.org/wiki/Linux * Learn more about Tux http://en.wikipedia.org/wiki/Tux _______________________________________________ -- 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
