/Olle
-------- Original Message -------- Subject: Re: [openss7]Project: Asterisk PBX Date: Mon, 05 Jan 2004 06:32:17 -0500 From: Tom Scott <[EMAIL PROTECTED]> Organization: Vedatel To: [EMAIL PROTECTED] References: <[EMAIL PROTECTED]> <[EMAIL PROTECTED]>
Greetings,
Have you looked at the softswitch architecture at the IPCC website (packetcomm.org and softswitch.org)? Here's the url: http://packetcomm.org/dms/contentlist.asp?catID=28&parentid=19
I put their softswitch architecture diagram here: http://vedatel.com/Isdn/cisco_ss7_interconn_ref_model.html#mozTocId32198
The five main functional types are: signaling conversion SC, media gateway MG, media gateway controller MGC, application server AS, media server MS. I think what we're looking for is the left-hand column (SS7/IMT access plane: SG, MGC and MG). The other blocks in the application plane and H.323/ISDN access plane may not be directly on-topic in this openss7.org list, but at least we could use the reference architecture to distinguish the components and decide where to discuss them (either here or at asterisk.org lists).
Could someone explain what are the main problems in adding the SS7 access plane to the asterisk pbx? what are the issues? speed? scale?
-- TT
-------- Original Message -------- Subject: Re: [openss7]Project: Asterisk PBX Date: Sun, 04 Jan 2004 17:24:34 +0200 From: Nir Simionovich <[EMAIL PROTECTED]> To: Vlasis Hatzistavrou <[EMAIL PROTECTED]> CC: [EMAIL PROTECTED] References: <[EMAIL PROTECTED]>
Hi Vlasis,
Well, we can go about and connecting a Cisco 54xx router between the Asterisk box and the SS7 entity, however, this connection costs around 80,000$ and is limited to 16xE1 lines only. I've also checked if it will support SS7 over IP (SIGTRAN), which it is supposed to support correctly, however, the price tag on that is even higher than the previous one. From my POV, it kind of misses the concept of using Open Source on this issue, as I can get a NexTone Softswitch that will support SS7 for the same price - but I guess we are all here as we want to use OpenSource, aren't we?
Nir S
Vlasis Hatzistavrou wrote:
Hello,
To the comment of Nir, I would like to add that I know from many partners of ours that they would benefit from a SS7-capable platform like Asterisk.
Are there any alternatives platforms to Asterisk which use OpenSS7?
Best regards, Vlasis Hatzistavrou.
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Nir Simionovich Sent: Sunday, January 04, 2004 10:22 AM To: [EMAIL PROTECTED] Subject: RE: [openss7]Project: Asterisk PBX
Hi All,
I've conversed with Brian on this issue a while back, and according to him, Asterisk is just TOO slow to handle SS7 (I may have misunderstood him) and in addition, the current channel implemenation method that Asterisk works with is not compatible with SS7.
However, I would like to point out that the VoIP BOOM lately sure justifies the re-animation of this project. I'm confident that many people are in need of this project (me including). I'm currently involved in a large scale installation in China, where Asterisk is involved, and the carrier being connected now popped that he DEMANDS SS7 connectivity for a capacity of over 10xE1 connections.
In addition, I've also got projects running in other countries that would benefit from SS7 connectivity for Asterisk. If the problem is directing funds to this development, I'm confident that I can arrange a contribution of funds for this development, but we would like to know that this project is re-animated.
Asterisk and GnuGK are becoming well accepted VoIP/Switching alternatives in the Telco market, and having Asterisk use OpenSS7 is no longer a nice to have, it's a MUST in order to make sure that OpenSource technologies remain a valid choice for Telco managers and descision makers.
Regards, Nir S
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Herry Sitepu Sent: Saturday, January 03, 2004 2:37 AM To: [EMAIL PROTECTED] Subject: [openss7]Project: Asterisk PBX
Does this project still running. Any available code or documentation yet??
Regards, Herry Sitepu
--- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.558 / Virus Database: 350 - Release Date: 2/1/2004
-- __________________________________________________________________ Nir Simionovich IT Manager m-Wise Ltd. e-Mail: [EMAIL PROTECTED] cell: +972-54-482826
-------- Original Message -------- Subject: Re: [openss7]Project: Asterisk PBX Date: Mon, 5 Jan 2004 06:09:53 -0700 From: Brian F. G. Bidulock <[EMAIL PROTECTED]> Reply-To: [EMAIL PROTECTED] Organization: http://www.openss7.org/ To: Tom Scott <[EMAIL PROTECTED]> CC: [EMAIL PROTECTED] References: <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> <[EMAIL PROTECTED]>
Tom, Vlasis, Nir,
OpenSS7 has components at all the points of the reference architecture (SC-F, MGC/AS-F, MG/MS-F). Did you think it was *just* SS7?
Judging from what I have seen of Asterisk code, it could not come close to passing a simple Q.921/931 conformance suite. It might be possible to run partially implemented state machines line-side on BRI or PRI (where the switch will protect against under- or poor implementation), however, trunk-side this is unacceptable.
The reason I didn't implement just a "channel driver" for SS7 on the Digium cards was that the Asterisk soft-HDLC code could not handle SS7 (FISUs and LSSUs), was putting too many flags between frames, was discarding frames, wrapping on the receive buffers, ... It would not be possible to meet 10E-6 BER because the Asterisk soft-HDLC was introducing more errors than that leaving nothing for the transmission facility. Skips and drops and pops might be ok for voice and even line-side ISDN signalling, but is unacceptable for trunk-side transmission and signalling.
It is clear that Asterisk lacks SS7, but why do you think that OpenSS7 needs Asterisk?
On another note, what distros are people wanting to run OpenSS7 on lately? RedHat? Suse? Some embedded distro? Debian?
--brian
Tom Scott wrote: Mon, 05 Jan 2004 06:32:17 > Greetings, > > Have you looked at the softswitch architecture at the IPCC website > (packetcomm.org and softswitch.org)? Here's the url: > http://packetcomm.org/dms/contentlist.asp?catID=28&parentid=19 > > I put their softswitch architecture diagram here: > http://vedatel.com/Isdn/cisco_ss7_interconn_ref_model.html#mozTocId32198 > > The five main functional types are: signaling conversion SC, media gateway MG, > media gateway controller MGC, application server AS, media server MS. I think > what we're looking for is the left-hand column (SS7/IMT access plane: SG, MGC > and MG). The other blocks in the application plane and H.323/ISDN access plane > may not be directly on-topic in this openss7.org list, but at least we could > use the reference architecture to distinguish the components and decide where > to discuss them (either here or at asterisk.org lists). > > Could someone explain what are the main problems in adding the SS7 access plane > to the asterisk pbx? what are the issues? speed? scale? > > -- TT > > > -------- Original Message -------- > Subject: Re: [openss7]Project: Asterisk PBX > Date: Sun, 04 Jan 2004 17:24:34 +0200 > From: Nir Simionovich <[EMAIL PROTECTED]> > To: Vlasis Hatzistavrou <[EMAIL PROTECTED]> > CC: [EMAIL PROTECTED] > References: <[EMAIL PROTECTED]> > > Hi Vlasis, > > Well, we can go about and connecting a Cisco 54xx router between the Asterisk > box and the SS7 entity, however, this connection costs around 80,000$ and is limited > to 16xE1 lines only. I've also checked if it will support SS7 over IP (SIGTRAN), > which > it is supposed to support correctly, however, the price tag on that is even higher > than the previous one. From my POV, it kind of misses the concept of using Open > Source > on this issue, as I can get a NexTone Softswitch that will support SS7 for the same > price - but I guess we are all here as we want to use OpenSource, aren't we? > > Nir S > > Vlasis Hatzistavrou wrote: > > Hello, > > > > To the comment of Nir, I would like to add that I know from many partners of > > ours that they would benefit from a SS7-capable platform like Asterisk. > > > > Are there any alternatives platforms to Asterisk which use OpenSS7? > > > > Best regards, > > Vlasis Hatzistavrou. > > > > > > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf > > Of Nir Simionovich > > Sent: Sunday, January 04, 2004 10:22 AM > > To: [EMAIL PROTECTED] > > Subject: RE: [openss7]Project: Asterisk PBX > > > > > > Hi All, > > > > I've conversed with Brian on this issue a while back, and according to > > him, Asterisk > > is just TOO slow to handle SS7 (I may have misunderstood him) and in > > addition, the current > > channel implemenation method that Asterisk works with is not compatible > > with SS7. > > > > However, I would like to point out that the VoIP BOOM lately sure > > justifies the re-animation > > of this project. I'm confident that many people are in need of this > > project (me including). > > I'm currently involved in a large scale installation in China, where > > Asterisk is involved, > > and the carrier being connected now popped that he DEMANDS SS7 > > connectivity for a capacity > > of over 10xE1 connections. > > > > In addition, I've also got projects running in other countries that > > would benefit from > > SS7 connectivity for Asterisk. If the problem is directing funds to this > > development, I'm > > confident that I can arrange a contribution of funds for this > > development, but we would like > > to know that this project is re-animated. > > > > Asterisk and GnuGK are becoming well accepted VoIP/Switching > > alternatives in the Telco market, > > and having Asterisk use OpenSS7 is no longer a nice to have, it's a MUST > > in order to make sure > > that OpenSource technologies remain a valid choice for Telco managers > > and descision makers. > > > > Regards, > > Nir S > > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > > Behalf Of Herry Sitepu > > Sent: Saturday, January 03, 2004 2:37 AM > > To: [EMAIL PROTECTED] > > Subject: [openss7]Project: Asterisk PBX > > > > > > Does this project still running. Any available code or documentation > > yet?? > > > > Regards, > > Herry Sitepu > > > > > > --- > > Outgoing mail is certified Virus Free. > > Checked by AVG anti-virus system (http://www.grisoft.com). > > Version: 6.0.558 / Virus Database: 350 - Release Date: 2/1/2004 > > > > -- > __________________________________________________________________ > Nir Simionovich > IT Manager > m-Wise Ltd. > e-Mail: [EMAIL PROTECTED] > cell: +972-54-482826 > > >
-- Brian F. G. Bidulock � The reasonable man adapts himself to the � [EMAIL PROTECTED] � world; the unreasonable one persists in � http://www.openss7.org/ � trying to adapt the world to himself. � � Therefore all progress depends on the � � unreasonable man. -- George Bernard Shaw �
------------------------------------------------------------------------
-------- Original Message --------
Subject: Re: [openss7]Project: Asterisk PBX
Date: Mon, 5 Jan 2004 17:08:51 -0500
From: Vance Shipley <[EMAIL PROTECTED]>
Organization: Motivity Telecom Inc.
To: Nir Simionovich <[EMAIL PROTECTED]>, Tom Scott <[EMAIL PROTECTED]>, [EMAIL PROTECTED]
References: <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> <[EMAIL PROTECTED]>
The problem with Asterisk is that they have taken the VoIP concept way too far. The hardware implementation doesn't include a telephony bus such as H.100. That's fine if you're in a VoIP environment but if you have a TDM call and want to switch it you have to packetize it over the PCI bus and that is just plain wrong. The lack of HDLC engines on board is an extension of this problematic attitude. Their argument is that it is cheaper to build the boards with a smaller chip count. For that argument to hold water the cost of their boards should be a small fraction of the market rate for these types of boards however it is not.
Just my (service provider centric) opinion.
-Vance
_______________________________________________ Asterisk-Dev mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-dev
