[asterisk-ss7] number of sigchans on single linkset

Tue Mar 27 08:01:58 CDT 2012

On Tue, 27 Mar 2012 17:35:34 +0500, Abdul Basit <basit.engg at gmail.com>
wrote:
> yap.
> here is my system.conf:
> 
> #
> # Global data
> 
> loadzone        = us
> defaultzone     = us
> 
> # Span 1: TE4/0/1 "T4XXP (PCI) Card 0 Span 1" (MASTER) HDB3/CCS
> span=1,1,0,ccs,hdb3
> bchan=1-15,17-31
> mtp2=16
> echocanceller=mg2,1-15,17-31
> 
> # Span 2: TE4/0/2 "T4XXP (PCI) Card 0 Span 2" HDB3/CCS
> span=2,2,0,ccs,hdb3
> bchan=32-46,48-62
> mtp2=47
> echocanceller=mg2,32-46,48-62
> 
> # Span 3: TE4/0/3 "T4XXP (PCI) Card 0 Span 3" HDB3/CCS
> span=3,3,0,ccs,hdb3
> bchan=63-77,79-93
> mtp2=78
> echocanceller=mg2,63-77,79-93
> 
> # Span 4: TE4/0/4 "T4XXP (PCI) Card 0 Span 4" HDB3/CCS
> span=4,4,0,ccs,hdb3
> bchan=94-108,110-124
> mtp2=109
> echocanceller=mg2,94-108,110-124
> 
> # Span 5: TE4/1/1 "T4XXP (PCI) Card 1 Span 1" HDB3/CCS
> span=5,5,0,ccs,hdb3
> bchan=125-139,141-155
> mtp2=140
> echocanceller=mg2,125-139,141-155
> 
> # Span 6: TE4/1/2 "T4XXP (PCI) Card 1 Span 2" HDB3/CCS
> span=6,6,0,ccs,hdb3
> bchan=156-170,172-186
> mtp2=171
> echocanceller=mg2,156-170,172-186
> 
> # Span 7: TE4/1/3 "T4XXP (PCI) Card 1 Span 3" HDB3/CCS
> span=7,7,0,ccs,hdb3
> bchan=187-201,203-217
> mtp2=202
> echocanceller=mg2,187-201,203-217
> 
> # Span 8: TE4/1/4 "T4XXP (PCI) Card 1 Span 4" HDB3/CCS
> span=8,8,0,ccs,hdb3
> bchan=218-232,234-248
> mtp2=233
> echocanceller=mg2,218-232,234-248
> 
> --
> regards,
> 
> abdul basit
> 
> 
> On Tue, Mar 27, 2012 at 12:46 PM, Kaloyan Kovachev
> <kkovachev at varna.net>wrote:
> 
>> Hi,
>>
>> On Mon, 26 Mar 2012 20:18:48 +0500, Abdul Basit <basit.engg at gmail.com>
>> wrote:
>> > I recompiled libss7 and asterisk with
>> >
>> > libss7-1.0.2/ss7_internal.h:#define SS7_MAX_LINKS        16
>> >
>> > asterisk-1.6.2.10/channels/chan_dahdi.c:#define NUM_DCHANS      16
>> >
>> > But as soon as i add 5th link, i get error
>> >
>> >  Command 'module load chan_dahdi.so' failed.
>> > [Mar 21 16:25:28] ERROR[10641]: chan_dahdi.c:15568
linkset_addsigchan:
>> > Unable to open SS7 sigchan 140 (No such device or address)
>>

sigchan 140 is not found at all, which is outside of asterisk/libss7, but
dahdi does not place such limits (1024 is far more than 16)

what does dahdi_cfg -vvt say? Do you see channel 140 being configured?

>> have you (re)defined it in system.conf or it is still commented out?
>>
>> >
>> > While with 4 signalling links its perfect.
>> >
>> >  [Mar 21 16:46:05]  Loaded chan_dahdi.so => (DAHDI Telephony Driver
>> w/SS7)
>> > *CLI> [Mar 21 16:46:05] MTP2 link up (SLC 0)
>> > [Mar 21 16:46:05] MTP2 link up (SLC 1)
>> > [Mar 21 16:46:05] --- SS7 Up ---
>> > [Mar 21 16:46:05] Resetting CICs 1 to 15
>> > [Mar 21 16:46:05] Resetting CICs 17 to 31
>> > [Mar 21 16:46:05] Resetting CICs 33 to 47
>> > [Mar 21 16:46:05] Resetting CICs 49 to 63
>> > [Mar 21 16:46:05] Resetting CICs 65 to 79
>> > [Mar 21 16:46:05] Resetting CICs 81 to 95
>> > [Mar 21 16:46:05] Resetting CICs 97 to 111
>> > [Mar 21 16:46:05] Resetting CICs 113 to 127
>> > [Mar 21 16:46:05] Resetting CICs 129 to 143
>> > [Mar 21 16:46:05] Resetting CICs 145 to 159
>> > [Mar 21 16:46:05] Resetting CICs 161 to 175
>> > [Mar 21 16:46:05] Resetting CICs 177 to 191
>> > [Mar 21 16:46:05] Resetting CICs 193 to 207
>> > [Mar 21 16:46:05] Resetting CICs 209 to 223
>> > [Mar 21 16:46:05] Resetting CICs 225 to 239
>> > [Mar 21 16:46:05] Resetting CICs 241 to 255
>> > [Mar 21 16:46:06] MTP2 link up (SLC 3)
>> > [Mar 21 16:46:06] MTP2 link up (SLC 2)
>> >
>> > Checking with my provider. Will update after coordination.
>> >
>> > --
>> >
>> > regards,
>> >
>> > Abdul Basit
>> >
>> >
>> >
>> > On Mon, Mar 19, 2012 at 12:16 AM, Kaloyan Kovachev
>> > <kkovachev at varna.net>wrote:
>> >
>> >> Not sure about SIG_SS7_NUM_DCHANS, but i am using SS7_MAX_LINKS and
>> >> SS7_MAX_ADJSPS = 8 (with 6 links actually) for over 3 years without
a
>> >> problem and as the max SLC is 4 bit it seems right to have 16 as the
>> >> hardcodded maximum
>> >>
>> >> On Sun, 18 Mar 2012 22:54:20 +0500, Abdul Basit
<basit.engg at gmail.com>
>> >> wrote:
>> >> > Kaloyan,
>> >> >
>> >> > Thank you for suggestion.
>> >> > I will update and recompile asterisk. Will get back with results.
>> >> >
>> >> > --
>> >> > regards,
>> >> >
>> >> > Abdul Basit
>> >> >
>> >> >
>> >> >
>> >> > On Sat, Mar 17, 2012 at 12:47 PM, Kaloyan Kovachev
>> >> > <kkovachev at varna.net>wrote:
>> >> >
>> >> >> On Fri, 16 Mar 2012 23:25:40 +0500, Abdul Basit
>> <basit.engg at gmail.com>
>> >> >> wrote:
>> >> >> > This is production machine. I found it as stable one and
working
>> >> >> > fine
>> >> >> with
>> >> >> > me.
>> >> >> > Moreover, I tested with latest asterisk 1.6.2.23 but this is
not
>> >> >> > solving
>> >> >> > slc problem.
>> >> >> >
>> >> >> > If someone has better idea/suggestion thanks in advance.
>> >> >>
>> >> >> There are few hardcoded limits:
>> >> >> in libss7
>> >> >> ss7_internal.h  SS7_MAX_LINKS   4
>> >> >> ss7_internal.h  SS7_MAX_ADJSPS  4
>> >> >>
>> >> >> in Asterisk 1.8 and up to trunk
>> >> >> sig_ss7.h       SIG_SS7_MAX_CHANNELS    672 (which is 1 DS3 = 28
T1
>> or
>> >> >> about 22 E1)
>> >> >> which is equal to MAX_CHANNELS in older versions
>> >> >> sig_ss7.h       SIG_SS7_NUM_DCHANS      4   (in older versions is
>> just
>> >> >> NUM_DCHANS)
>> >> >>
>> >> >> also NUM_SPANS = 32 unless you have compiled asterisk with the
>> >> >> 'lots
>> >> >> of
>> >> >> spans' option in which case it is 128
>> >> >>
>> >> >> in short upgrading will not solve your problem - you should
change
>> the
>> >> >> hardcoded value and recompile.
>> >> >> In my opinion it is safe to increase them all from 4 to 16
(links,
>> >> adjspc
>> >> >> and dchans)
>> >> >>
>> >> >> >
>> >> >> > --
>> >> >> > regards,
>> >> >> >
>> >> >> > Abdul Basit
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> > On Fri, Mar 16, 2012 at 8:54 PM, Kevin P. Fleming
>> >> >> > <kpfleming at digium.com>wrote:
>> >> >> >
>> >> >> >> On 03/16/2012 08:52 AM, Abdul Basit wrote:
>> >> >> >>
>> >> >> >>> While browsing through the code in
>> >> >> >>>
>> >> >> >>> asterisk-1.6.2.10/channels/**chan_dahdi.c
>> >> >> >>>
>> >> >> >>
>> >> >> >> Why are you using such an old version of Asterisk?
>> >> >> >>
>> >> >> >> --
>> >> >> >> Kevin P. Fleming
>> >> >> >> Digium, Inc. | Director of Software Technologies
>> >> >> >> Jabber: kfleming at digium.com | SIP: kpfleming at digium.com |
Skype:
>> >> >> >> kpfleming
>> >> >> >> 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
>> >> >> >> Check us out at www.digium.com & www.asterisk.org
>>