[asterisk-ss7] Too many links defined for linkset

[Gustavo Marsico]

Changing some of the label structure breaks Q.704. Point 15.2 of Q.704 says that the label structure has 4 bits for SLC, 14 for OPC and 14 for DPC (total-32). So you have only 4 bits (D'16) to handle the links and there is no PSTN switch supporting other than 4 bits. Doesn't make any sense at all to change something to being incompatible with the rest of the network :)
Also, the ITU-T SS7 recommendations says that you shouldn't handle more than 2000 CICs per link. So with 32 E1 and 2 links you have less than a quarter of the recommended load on those two links.

Gustavo


On 17 May 2010, at 15:05, Jorge Antillon wrote:

> Gustavo,
> 
> Well, what are the implications?, will that break some intricate logic into the SS7 stack or just break the standard set forth in Q.704?
> so that's for one, for two, there is that additional patch to be applied to chan_ss7 when having more than one signaling channel on a single cluster.
> 
> 
> 
> <ticom-t.jpg>	 Jorge Antillon
> CEO - CTO
> ticom - Costa Rica Telecom
> 
> 
> 
> 
> On Mon, 2010-05-17 at 14:19 -0300, Gustavo Marsico wrote:
>> 
>> This is not CAS, you don't need a link per E1. As defined in Q.704, you cannot have more than 16 links per linkset (only 4 bits for SLC). The most common configuration is to have al least 2 links. For 32 E1 (992 CICs) you don't need more than 2 links. Or 4 links, 2 per server if you like.
>> 
>> Gustavo
>> 
>> 
>> On 17 May 2010, at 14:04, Arafath-uz-zaman khan wrote:
>> 
>> > Hello Wasim
>> > 
>> > Thanks for your mail. Yes i changed that setting's early, but i m confused
>> > if that effect, Cause i will go for a large installation after few days. so
>> > just to confirm if i need to change anything more on the code.
>> > 
>> > Thanks again
>> > Arafath
>> > 
>> > On Mon, May 17, 2010 at 1:40 PM, Arafath-uz-zaman khan <shaon.khan at gmail.com
>> >> wrote:
>> > 
>> >> Hello all
>> >> 
>> >> I was trying to configure total 32 E1( 16 E1 per server) using sangoma
>> >> card. I got following msg when i am trying to run mtp3d " *config.c:707
>> >> load_config_link Too many links defined for linkset 'MSC1' for link 'l17'
>> >> (max 16)* " . How can use more E1 with chan_ss7, does anyone have any
>> >> patch or information, so i can use. Please guide me
>> >> 
>> >> Best Regards
>> >> Arafath
>> >> --
>> >> 
>> >> 
>> > 
>> > 
>> > -- 
>> > Arafath-uz-zaman khan
>> > -- 
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