Bruce, Bell won't allow you more than 23 calls with RLT. if using another provider, they too have limits on the amount of channels you can use with RLT.
I was one of the first business in Canada back in 1999 to use something similar called TBCT (Two B Channel Transfer) with notification back to controller (for real time billing) using the Dialogic T1 boards. You have more chance with TBCT if your provider supports it with 5ESS or NI2 protocol. Your PRI-T1 provider needs to enable this option on your D-Channel. According to Kevin P. Flemming from Digium, Asterisk supports TBCT with librpri 1.4.x. I wish I had Asterisk back in 1999! I spent 3 months coding and testing TBCT by encoding my own special IE structures to handle TBCT! The only thing missing is the notification back to controller. This feature allows the host switch to send a special FACILITY message back to your system to inform you when the transferred calls are cleared (disconnected). With this feature, you could still process CDRs with the proper call length. Good luck. Stephan Monette Unlimitel Inc. On 2010-01-14, at 6:32 PM, Bruce N wrote: > > Thanks that clears up my questions.And my final question, has anyone got RLT > = Release Line Trunking working on PRI with Asterisk/Sangoma?My understanding > of RLT is that if an outside number is called and then that is flashed or > transfered to another outside number then it is as if no B channels are in > use anymore. Full PRI capacity is still available for the call and the two > parties are connected outside of the PRI circuit. I understand that without > RLT two B channels will be used and with RLT no B channels will be used after > the transfer occurs.Thanks a lot,Bruce > Date: Thu, 14 Jan 2010 18:23:53 -0500 > From: [email protected] > To: [email protected] > CC: [email protected] > Subject: Re: [on-asterisk] PRI Configuration Form > > > > > > > > > > Glare happens when an attempt to access an outgoing channel happens at > the same time as the carrer presents an incoming call on that channel: > > > > http://en.wikipedia.org/wiki/Call_collision > > > > I'm not sure exactly what virtual group refers to, other than that > there are lots of options possible on a PRI circuit. In general these > are of limited use. Whatever it is can be controlled by asterisk (for > example, limiting the number of calls on a particular DID). > > > > > > > > > > > > On 1/14/2010 6:16 PM, Bruce N wrote: > > > Thanks for the input Jim. > > > > 1- Can you please shed some more light on why use ASEQ and what > you mean by glare? > > > > 2- Also what is virtual group option? > > > > RJ45 is used for Sangoma. And seen a note somewhere that using > Asterisk can't send CLID/Name with NI-1 so it's definitly NI-2 to go > with as you said. > > > > Thanks again, > Bruce > > >> Date: Thu, 14 Jan 2010 17:59:56 -0500 > >> From: [email protected] > >> To: [email protected] > >> CC: [email protected] > >> Subject: Re: [on-asterisk] PRI Configuration Form > >> > >> DS1 is the same thing as T1, so you would normally need a single > DS1 > >> > >> You don't have to get 23 B channels if you don't think you need > that > >> many. There may not be a cost savings, though, so might as well go > for > >> the full 23 unless your rep has other packages available. > >> > >> 1 D channel is fine. If you were getting a PRI circuit delivered > over > >> multiple T1s, you might want to have backup d-channels, otherwise > don't > >> bother. > >> > >> Ask for an RJ45. The DB-15 is an older standard, not very common > anymore > >> > >> Line Coding - B8ZS/ESF is the standard. No reason to ask for > anything else > >> > >> Ascending channel selection. you will select descending in your > >> asterisk, and this combination will reduce the chances of glare > happening. > >> > >> Digits to outpulse: how many digits do you want to get? I would > >> recommend 10, so that you get the full DNIS instead of just the > last few > >> digits > >> > >> As for NI-2 if you're connecting to Asterisk > >> > >> Overflow means what do you want them to do with incoming calls if > your > >> D-channel is down or all your circuits are unavailable. It's > basically a > >> phone number. > >> > >> No digit substitution should be required. You want them to send > you the > >> DID that was dialed. They can send something else, but there's > really no > >> need with Asterisk. > >> > >> > >> > >> > >> > >> On 1/14/2010 5:30 PM, Bruce N wrote: > >>> Hi Guys, > >>> > >>> > >>> Trying to fill up a form for an order of a PRI circuit. Will > be using either of Sangoma A101D or A102D with Asterisk 1.4 or 1.6. Not > sure about some of the terms and wondering what is supported by the > mentioned Sangoma cards and what are the disadvantages/advantages of > using one option over the other: > >>> > >>> (I have filled out some fields hoping it's right for my needs) > >>> > >>> # of DS1 Accesses = ? ; Not sure what to put? 24? > >>> # of B Channels = 23 ; I guess this is standard for 1 circuit > >>> # of D Channels = 1 ; No need to have more than 1 of this > either > >>> Back up D required = y/n ; what is the advantage of having a > backup D? > >>> Line Coding& Framing = B8ZS / ESF ; Which one to pick and > why? > >>> > >>> Trunk Selection Sequence = > Asequential/ASEQ(ascending)/DSEQ(descending)/MIDL(most idle)/LIDL(least > idle)/CW(clockwise)/CCW(counter clockwise) Using one DID and hunt all > other numbers. Which to pick? I guess (ascending) > >>> > >>> Type of interface required at demarc = RJ45/DB15 ; what is > going to be for Sangoma A101D card? > >>> > >>> Digits to Outpulse = 0-10 digit ; what is this? > >>> ISDN Protocol = NI-1 or NI-2 ; which one to pick and why? > >>> > >>> Overflow Required = y/n Include D channel failure ; how > necessary is this specially with D Channel. > >>> > >>> Hunt Grou = y/n ; obviously YES > >>> Virtual Group = y/n ; what is this? > >>> Digit Substitution Required = y/n ; what is this? > >>> > >>> > >>> Thanks for answering any or all of the above. > >>> > >>> -Bruce > >>> > _________________________________________________________________ > >>> Say Happy New Year with Messenger for Mobile. > >>> http://go.microsoft.com/?linkid=9706117 > >>> > >> > >> -- > >> > >> -- > >> Jim Van Meggelen > >> [email protected] > >> http://www.oreillynet.com/pub/au/2177 > >> > >> "A child is the ultimate startup, and I have three. > >> This makes me rich." > >> Guy Kawasaki > >> -- > >> > > > > Spread the cheer with Messenger for mobile. Learn more. > > > -- > > -- > Jim Van Meggelen > [email protected] > http://www.oreillynet.com/pub/au/2177 > > "A child is the ultimate startup, and I have three. > This makes me rich." > Guy Kawasaki > -- > > _________________________________________________________________ > --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
