Hi List, I need to change my provider, at this time Asterisk box is on VOIP trunk. I have two options, T1 or 15 analog lines. I have some experience with analog and I have had two main issues with it. first is echo (I have not tried HPEC yet) and second unpredictable volume. The question is, if I use TE100 with PRI , will I have same issues? I would appreciate any comments and sample zaptel.conf and zapata.conf -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20070416/21087fbd/attachment.htm
In general, you're going to have better luck with a PRI. A lot of echo occurs at the point where analog lines are broken out of a digital transport. Also, from an economic standpoint, you *really*, *really* don't want to order 15 analog lines. Generally the rule of thumb in most areas of the US is that if you're ordering six or more analog lines, you might as well just buy a PRI, the way the price points are structured. Plus, with 15 analog lines, that's a lot of termination hardware. And if you're thinking of putting it in the same chassis, expect possible bus problems / IRQ issues / etc. of the sort that are regularly discussed here. Sorry if I misunderstood your question... -- Alex On Mon, 16 Apr 2007, Al said something to this effect:> Hi List, > I need to change my provider, at this time Asterisk box is on VOIP trunk. > I have two options, T1 or 15 analog lines. > I have some experience with analog and I have had two main issues with it. > first is echo (I have not tried HPEC yet) and second unpredictable volume. > The question is, if I use TE100 with PRI , will I have same issues? > I would appreciate any comments and sample zaptel.conf and zapata.conf-- Alex Balashov <sasha@presidium.org>
Quoting ar_daei@hotmail.com:> I have two options, T1 or 15 analog lines. > The question is, if I use TE100 with PRI , will I have same issues? > I would appreciate any comments and sample zaptel.conf and > zapata.conf15 lines should be well beyond the cost justification point for a T1 and you will get significantly better quality (disconnects) and functionality out of digital trunk. Plus you clean up the telco closet. Remember, you don't need to activate all 23 lines so if you just need 15 then you can activate only that number. You also can have potentially hundreds of numbers that terminate on this group of lines. This makes some of your coding a little different because you no longer make an association between which port(s) ring and what number the caller dialed to get here. This is called DNIS (Dialed Number Identification System) (people don't flame me for the ANI/DNIS thing OK? Not relevant for this discussion). When ordering the PRI the telco will ask you what type of signaling you want and how many DNIS digits. Personally, as we have intermixed area codes, I always ask for 10 digits DNIS. This means when asterisk answers the phone the $EXTEN will equal the full phone number the caller dialed to get here. loadzone = us defaultzone = us span = 1,2,0,esf,b8zs bchan = 01-23 dchan = 24 span = 2,3,0,esf,b8zs bchan = 25-30 dchan = 48 This is a zaptel.conf for 2 PRI's. 23 chan on 1 and 6 on the second. It stipulates ESF (Extended SuperFrame) with b8zs coding. Both PRI's have their D channel on the last (24th) channel. As for emulation I try to ask for NI2 (which is a config that goes in zapata.conf for switchtype). Hope this gets you started. -- dbc.
Thanks for response. Well, at this time i'm looking at TE100 card. Do i need to compile libpri in order to use this card and PRI connection to provider? Lets say i'm getting 16 channel (line) from provider. What configuration i need to use in zaptel and zapata? is channel 24 always d channel? _________________________________________________________________ Get a FREE Web site, company branded e-mail and more from Microsoft Office Live! http://clk.atdmt.com/MRT/go/mcrssaub0540002919mrt/direct/01/ -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20070416/c37e0110/attachment.htm
Since we are on the topic of t1/PRI i was just curious as to how people running a t1/PRI card in their asterisk boxes would handle a failure. We use a PRI but instead of having it run to our asterisk box we use a cisco 3600 router to terminate the PRI and then sip to the asterisk box. Now a failure for us is simple just change the ip on the backup box and your done. Im just curious ive heard pros and cons for a t1/PRI card in the asterisk box and interested to see how people deal with failures in that type of setup. On 4/16/07, Alex Balashov <abalashov@evaristesys.com> wrote:> > On Mon, 16 Apr 2007, Eric "ManxPower" Wieling said something to this > effect: > > > T-1s do not have to be PRI. In fact many of them are not. You can have > a > > T-1 with a mix of signaling methods, FXO, FXS, E&M, E&M/Wink, loop > start, > > ground start, etc. > > Yes, and it is worth pointing out that some LECs will give considerable > discounts for non-ISDN trunks. BellSouth will charge rather less for an > E&M trunk than a PRI I heard. > > -- > Alex Balashov <sasha@presidium.org> > _______________________________________________ > --Bandwidth and Colocation provided by Easynews.com -- > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users >-------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20070416/0e644abb/attachment.htm