I want to put a * server in front of our legacy phone system. Currently this legacy system is connected to the CO with an ISDN PRI interface. With a dual PRI card in the * server can I only pass thru a certain number of channels to the legacy phone system and then leave the other half of the channels for Asterisk to use for a Meet Me conference bridge configuration? Can I make the * server nearly invisible to the legacy phone system? The legacy phone system would only be able to use, for example, channels 16-23 from the ISDN PRI coming out of the * server. CO---[ISDN PRI]--Asterisk--[ISDN PRI]--legacy phone system Thanks! -- Matt Burleigh Senior Systems Engineer Enterprise Integration, Inc. eiisolutions.com 703-236-0790
Matt Burleigh wrote:> The legacy phone system would only be able to use, for example, channels > 16-23 from the ISDN PRI coming out of the * server.You cannot make it invisible, because the D-channel cannot be shared. However, PRI channels are allocated dynamically, so doing what you want to do is trivial using channel group assignments and count checking before initiating a dial operation in either direction. Just a matter of defining the logic and writing some dialplan magic to do it :-) The trick is understanding that the limitation is not a specific group of channels, but a maximum number of simultaneous channels in use.
> > I want to put a * server in front of our legacy phone system.Currently> this legacy system is connected to the CO with an ISDN PRI interface. > > With a dual PRI card in the * server can I only pass thru a certain > number of channels to the legacy phone system and then leave the other > half of the channels for Asterisk to use for a Meet Me conferencebridge> configuration?Yes.> > Can I make the * server nearly invisible to the legacy phone system?Yes providing you set the settings on whatever span is connected to your PBX the same as your carrier's and no configuration changes are required on the PBX.> > The legacy phone system would only be able to use, for example,channels> 16-23 from the ISDN PRI coming out of the * server.You could assign specific zap channels but there is no need. Just define a number of channels and let asterisk decide which channels to use.> > CO---[ISDN PRI]--Asterisk--[ISDN PRI]--legacy phone system > > Thanks! > > -- > Matt Burleigh > Senior Systems Engineer > Enterprise Integration, Inc. > eiisolutions.com > 703-236-0790
Thanks for the responses. I guess the next step is to get a Digium TE210P. Are there any other 2 port PRI cards anyone would recommend for *? -- Matt Burleigh Senior Systems Engineer Enterprise Integration, Inc. eiisolutions.com 703-236-0790 -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Steve Totaro Sent: Tuesday, December 13, 2005 10:49 AM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: RE: [Asterisk-Users] Partial PRI pass thru?> > I want to put a * server in front of our legacy phone system.Currently> this legacy system is connected to the CO with an ISDN PRI interface. > > With a dual PRI card in the * server can I only pass thru a certain > number of channels to the legacy phone system and then leave the other > half of the channels for Asterisk to use for a Meet Me conferencebridge> configuration?Yes.> > Can I make the * server nearly invisible to the legacy phone system?Yes providing you set the settings on whatever span is connected to your PBX the same as your carrier's and no configuration changes are required on the PBX.> > The legacy phone system would only be able to use, for example,channels> 16-23 from the ISDN PRI coming out of the * server.You could assign specific zap channels but there is no need. Just define a number of channels and let asterisk decide which channels to use.> > CO---[ISDN PRI]--Asterisk--[ISDN PRI]--legacy phone system > > Thanks! > > -- > Matt Burleigh > Senior Systems Engineer > Enterprise Integration, Inc. > eiisolutions.com > 703-236-0790_______________________________________________ --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
Matt Burleigh schrieb:> Thanks for the responses. I guess the next step is to get a Digium > TE210P. Are there any other 2 port PRI cards anyone would recommend for > *?Yes - there are 2xPRI cards based on the CologneChip HFC-E1 chip and the A102u cards from the Canada based manufacturer SANGOMA: I personally prefer the Sangoma cards because of the good support (wich we needed only very little compared to our problems with other brands) and the stability we experienced in our setups. On top of this they are field upgradeable and work in 3,3v and 5v PCI slots and low profile cases. You can find more information on www.sangoma.com Chris
\> >I'd recommend the Digium dual port cards - generation 2 card are > excellent and the support we receive superb. > >And it supports Digiums support and development of Asterisk -Sangomas> contribution is token if any. > > Unfortunately I cant speak for the 2nd gen. cards as we haven't used > them. The 1st gen. TE4xxP cause us a lot headache. HDLC errors andother> strange behaviour wich we - at least until now - don't experience with > the Sangomas. > > We made some not-so-good experiences with the Digium support but that > may be not the ususal case. Thanks to the great community we solvedmuch> of our problems but still our Digium installations are far fromstable.> > I usually prefer to support smaller companies and it may be true that > buying at Digium helps improving Asterisk. Thats why I would even paya> higher price for a Digium card that works just as good for us as the > Sangomas. But - at least in our installations - they don't and I cannot> afford the hours and hours of solving problems anymore. > > Of course we will test the 2nd gen cards and check if they work better > for us if we get the opportunity. > > ChrisThis has not been my experience at all with any of Digium's T1/E1 products. Analog boards are a different story but I am not sure of another solution for these cards. Thanks, Steve