On Jul 2, 2007, at 4:31 PM, James R. Stevens wrote: > All, > > It's been some time since this thread was alive but we are now seeing > some progress in this project. Which I will document. > We have ordered a T1 for the new building which we are moving (We are > getting 14 channels of the T1.) and have a Sangoma A101 card for a 3U > rack server. > The T1 will have B8ZF decoding and ESF framing which the sangoma card > should handle. > > They asked me if we want NI1 or NI2 ?? Is this a reference to the > PRI ? Yes. You want NI2.
> > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Pierre > Marceau > Sent: Tuesday, April 10, 2007 11:25 PM > To: asterisk-users@lists.digium.com > Subject: Re: [asterisk-users] Learn some terminalogy before mounting > this task. > > James, > > I'm sorry that I can't add anything but just wanted you to know that I > am watching this thread with great interest and suspect that many > others > will too. > > Thanks in advance for posting lots of details as you go thru the > process. > > Pierre > > >>>> [EMAIL PROTECTED] 4/10/2007 10:41:36 PM >>> > > Hi James, > > Admittedly, the terminological and conceptual barrier may present > some > impediments to the completeness and specificity of answers, so we > might > have to work at this a bit, but let's see how we can help: > > On Tue, 10 Apr 2007, James R. Stevens said something to this effect: > >> We have a T1 coming into the building(FYI-Our Voice and Data are on >> separate T's) terminating at the Smart Jack. > > Are you implying that there are two T1 circuits -- one voice, > and one > > data? Or do you mean that the T1 is channelised and some of the > channels > are used for voice and some for data? That's kind of what it sounds > like. > Sounds like you can do 7 calls on voice channels and the rest are > provisioned as a clear-channel data pipe. > > That would mean that you have some equipment for breaking them > out on > > your premises. The channel bank would break out the voice lines as > FXO > analogue lines (if you set it to) and those probably feed into your > PBX. > > The rest of the channels used for data would probably be signaled > out on > another T1 interface, but with some subrate DS0 channels missing. > That's > ust a guess. > > But what you say below suggests that my theory is wrong, so perhaps > it is > the case that you have separate voice and data T1s after all, even > though > you refer to it in the singular. > > Do be aware that under no circumstances does anyone generally refer > to a > T1 as a "T." :) > >> I can tell you our current phone system can handle 7 phone calls at a >> time: >> >> Does this mean the T only has 7 channels provisioned out of the 24 >> possible? > > This is possible. Do you happen to know what kind of signaling is > used > on it? Is it an ISDN PRI, or an E&M trunk? > >> Does a channel (In terms of the T1) = a port? > > A port on what? The channel bank? > > Channel banks generally do break the DS0s (subrate 64 kbps > channels, > of > which there are 24 on a T1) out, but some more sophisticated ones have > the > capability to do other things as well. > > If so, the answer is yes. > >> How many phone calls can one TDM400 support concurrently? (four ??) > > If it has four FXO ports and four FXO modules, yes. They come in > different combinations. Some come with 2 FXO (outside POTS lines > to CO) > > and 2 FXS (plain analogue POTS handsets) ports, etc. > >> Would I be better off getting a Zapata T1 card and forgetting the >> Channel bank all together(Use the digital signal)? > > You could do that. Personally, the easiest approach I would say > would be > to order a PRI. They've probably considerably gone down in prices, > too, > > especially if you go shopping with some friendly CLECs. The rule of > thumb > in the industry is that generally, once you pass the threshold of > six or > > seven POTS lines, it becomes economical to just order an entire > PRI, and > > once you do that, there usually aren't *very* considerable savings > to be > > gained from turning down all but a few channels. A PRI has 23 > channels > (bearer channels ("B channels")) and one signaling channel ("D > channel"); > it's a type of T1-based ISDN interface. > > So, you might potentially be able to get 23 in/outbound phone lines > for > roughly the same cost or a modest increase, which would increase your > organisation's capacity to do things like conference calling and other > things which tie up large amounts of outside lines. > > Do beware that if you go this route, PRIs can be ordered as > "inward-only" > (typically used for modem and termination-only telephony applications > like > voicemail, IVR, conferencing, etc.) or bidirectionally. > >> If we go with a Zapata T1 card for the Asterisk server would we be > able >> to provision an analog phone line, for say a FAX machine from it? > > No, not if the card doesn't have FXS ports on it. But you could > get > another Digium or Digiumlike card that does, even if it's just a > single-port (like the hugely popular X100P, which is very inexpensive) > and pull that off. > > Let me know what else we can answer, or if I substantially > misunderstood > your question. > > Good luck, > > -- Alex > > -- > Alex Balashov <[EMAIL PROTECTED]> > _______________________________________________ > --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 > _______________________________________________ > --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 > > -- > This message has been scanned for viruses and > dangerous content by Athens Hyperion Scanner, and is > believed to be clean. > > > -- > This message has been scanned for viruses and > dangerous content by Athens Hyperion Scanner, and is > believed to be clean. > > > _______________________________________________ > --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