Re: Problem SS7 with Digium Card

[yulian_o]

Hello
First of all no thread should be created since in latest releases mtp2/3 is controlled through signaling gateway and scheduler.
What are 2 sides of e1 connections ( are you connecting sgw to other sgw , asterisk or something else ).
Please provide a log on sgw side to see whats going on there.
Also please provide linkset show output from ss7 shell.

Best regards
Yulian Oifa

[ludovic monnier]

I use a crossover cable (loopback) between 2 span for test.

For beginning, i use a snippet code, like this, just for check MTP2.

 

 

 public void run(String[] args)
 {
  String params = new String("linkset create dahdi opc "+args[0]+" apc "+args[1]+" ni 0 linkset1");
  options = params.split(" ");
  System.out.println(params);
  
  DahdiLinksetFactory factory = new DahdiLinksetFactory();
  try
  {
   DahdiLinkset linkset = (DahdiLinkset) factory.createLinkset(options);
   params = new String("linkset link create span "+args[2]+" code "+args[3]+" channel "+args[4]+" linkset1 link1");
   System.out.println(params);
   linkset.createLink( params.split(" "));
   
   linkset.getLinksetStream();
   
   Scheduler scheduler = new Scheduler();
   Clock clock = new DefaultClock();
   scheduler.setClock(clock );
   
   
   
   linkset.setScheduler(scheduler );
   scheduler.start();
   linkset.activateLink("link1");
   linkset.activate();
   
  }
  catch (Exception e)
  {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 }

[yulian_o]

Hello
Why dont you just activate sgw , add 2 linkset and add one link for each and then test the solution?

Best regards
Yulian Oifa

[ludovic monnier]

Because, i haven't found how to do that with digium card.

I use this version:

                   mobicents-ss7-2.0.0.BETA1-src

 

But, seem to work only with Dialogic cards, or with sctp.

could you explain me how to proceed.

 

Thanks

[yulian_o]

Hello
Get latest ss7 code from mobicents ss7 : http://code.google.com/p/jss7/
verify that you have java 7 and maven installed.
go to main folder and run "mvn clean install -Pdahdilinux" this will compile the project.
After that you will have taget/mobicents-sgw folder under sgw copy that folder , or simply run the code from bin ( run.sh ).

Best regards
Yulian Oifa

[ludovic monnier]

Hi Yulian,

 

After compile project SGW, configure 2 linkset and 1 link for each, mtp2 is Aligned. :)

 

But, it seem i have a problem with the configuration of my digium card:

 

If i use link configured on "dchan or mtp2" in system.conf (channel 16 of each span) then MTP2 is never aligned.

And if i use, channel 1 of each span (bchan) then MTP2 is aligned, BUT i can see with dahdi_pcap (dump) lot of bad packet (filling)

 

Must i use parameters bchan, dchan or mtp2 ?

 

#cat /etc/dahdi/system.conf

 

# Span 1: TE4/0/1 "T4XXP (PCI) Card 0 Span 1" (MASTER) HDB3/CCS/CRC4

span=1,0,0,ccs,hdb3,crc4
# termtype: nt
bchan=1-15,17-31
#dchan=16
mtp2=16
#echocanceller=oslec,1-15,17-31

 

# Span 2: TE4/0/2 "T4XXP (PCI) Card 0 Span 2" HDB3/CCS/CRC4
span=2,0,0,ccs,hdb3,crc4
# termtype: te
bchan=32-46,48-62
#dchan=47
mtp2=47
#echocanceller=oslec,32-46,48-62

Thanks,

[yulian_o]

Hello
First of all dont use dchan , you should use mtp2.
Second you have a problem with timing configuration.

Try to set
span=2,1,0,ccs,hdb3,crc4 ( pay attention to 1 at clock source ).

Best regards
Yulian Oifa

[yulian_o]

Sorry my mistake you should work on b channel only!!!

[yulian_o]

Final configuration :

# Span 1: TE4/0/1 "T4XXP (PCI) Card 0 Span 1" (MASTER) HDB3/CCS/CRC4

span=1,0,0,ccs,hdb3,crc4
# termtype: nt
bchan=1-31
#dchan=16
#mtp2=16
#echocanceller=oslec,1-15,17-31

 

# Span 2: TE4/0/2 "T4XXP (PCI) Card 0 Span 2" HDB3/CCS/CRC4

span=2,1,0,ccs,hdb3,crc4
# termtype: te
bchan=32-62
#dchan=47
#mtp2=47

Btw you will see empty frames on dump since mtp2 always sends data.
I beleive that mtp2 settings in dahdi is used for built in mtp2 driver.
So for example if you use sgw to asterisk connection you will set mtp2=16 on asterisk side.

Best regards
Yulian Oifa

[ludovic monnier]

Hi,

 

Thanks, for these informations.

I have done a test with MTP2 channel on Asterisk and SGW with success.

In this case, on MTP2 i have a dump without garbage data, and on other channel (bchan), the dump is messy.

 

Ludovic

[yulian_o]

Hello
Thats because you see actuall mtp 2 packets , while on mtp2 channel you dont see them because nothing is sent except headers.

Best regards
Yulian oifa

[ludovic monnier]

I have to buy another card (4 E1), coud you give me your opinion about wich is the best card for SGW ?

 

Sangoma, Digium or Dialogic ? and wich model ?

 

Thanks

 

Ludovic

[Amit Bhayani]

Obviously Dialogic is above Diguim and Sangoma for simple reason DIalogic allows MTP2/3 on-board which reduces the load heavily on the CPU. 

However Dahdi based cards are much cheaper than Dialogic.

[yulian_o]

Hello
I am using Digium 8 E1 card.
Each slot allows 30 calls per second on ISUP , therefore one E1 allows 930 calls per second ( you dont have d channel ).in minute one E1 allows 55800 calls.
So even one E1 allows you high traffic.

About the cards.
There are several options :
1) Dialogic has built in cpu and protocols implemented so it does reduces the load from system.Together with that i dont think the load with even 8 e1 is not something sgw should handle.
I did not made a load tests but optimization will be done in future to allow 480 channels ( thats the goal ).So paying extra $ for dialogic card for my opinion is not a must.
2) Since dahdi has built in mtp2 driver its possible to work with it , so possibly in future sgw dahdi will be changed to work with built in driver instead of mtp2 implemented in sgw , this can also optimize
the perfomance.

Because dahdi is implemented by asterisk team i choosed digium card and not sangoma.
But of course its the matter of choise.

Best regards
Yulian Oifa

[ludovic monnier]

Hello,

 

Now, i try to compile the smscgateway project.

 

I use Java 1.7

 

1- git clone https://code.google.com/p/smscgateway/
2- mvn install clean

    but i have too many error...

 

Could you give me the procedure for build this project.

 

Thanks,

 

Ludovic

[ludovic monnier]

Hello Amit,

I seen you work on project smscgateway, and i try to compile this project.

I use Java 1.7

I got source from :

git clone https://code.google.com/p/smscgateway/

i run maven : 

mvn install clean

but i have too many error...

Could you help me for build this project. Can you give me all step. 

 

Thanks,

Ludovic

On Tuesday, July 3, 2012 6:33:19 PM UTC+2, Amit Bhayani wrote:

Obviously Dialogic is above Diguim and Sangoma for simple reason DIalogic allows MTP2/3 on-board which reduces the load heavily on the CPU. 

However Dahdi based cards are much cheaper than Dialogic.

[Amit Bhayani]

Please show us error here.

Amit.

[ludovic monnier]

first error :

 

Cannot find classes :

 

import org.mobicents.ss7.management.console.CommandContext;
import org.mobicents.ss7.management.console.CommandHandlerWithHelp;
import org.mobicents.ss7.management.console.CommandLineCompleter;

Thanks

On Wednesday, July 11, 2012 12:00:07 PM UTC+2, Amit Bhayani wrote:

Please show us error here.

Amit.

[ludovic monnier]

Hi,

 

Ok, i found it.

 

I have installed again jss7 and compile it.

After i have installed smscgateway

 

But now, i have this error :

Missing:
----------
1) org.mobicents.smsc:oam:jar:1.0.0.ALPHA-SNAPSHOT

  Try downloading the file manually from the project website.

  Then, install it using the command:
      mvn install:install-file -DgroupId=org.mobicents.smsc -DartifactId=oam -Dversion=1.0.0.ALPHA-SNAPSHOT -Dpackaging=jar -Dfile=/path/to/file

  Alternatively, if you host your own repository you can deploy the file there:
      mvn deploy:deploy-file -DgroupId=org.mobicents.smsc -DartifactId=oam -Dversion=1.0.0.ALPHA-SNAPSHOT -Dpackaging=jar -Dfile=/path/to/file -Durl=[url] -DrepositoryId=[id]

  Path to dependency:
   1) org.mobicents.smsc:bootstrap:jar:1.0.0.ALPHA-SNAPSHOT
   2) org.mobicents.smsc:oam:jar:1.0.0.ALPHA-SNAPSHOT

----------
1 required artifact is missing.

for artifact:
  org.mobicents.smsc:bootstrap:jar:1.0.0.ALPHA-SNAPSHOT

from the specified remote repositories:
  jboss-releases (http://repository.jboss.org/nexus/content/repositories/releases/),
  central (http://repo1.maven.org/maven2),
  mobicents-public-repository-group (https://oss.sonatype.org/content/groups/public),
  jboss-deprecated-repository (https://repository.jboss.org/nexus/content/repositories/deprecated/),
  cloudhopper-public (http://maven.cloudhopper.com/repos/third-party),
  jboss-public-repository-group (http://repository.jboss.org/nexus/content/groups/public)

 

Thanks for your help,

 

Ludovic

[ludovic monnier]

Hi,

 

Missing the directory :

http://smscgateway.googlecode.com/git//core/oam/src

 

We can found

ShellExecutor.java

Subject.java

here: http://code.google.com/searchframe#WZ-ZXh4lBLA/core/oam/src/main/java/org/mobicents/smsc/oam/&q=mobicents.smsc.oam.%20package:smscgateway%5C.googlecode%5C.com

But these files aren't in git. ( git clone https://code.google.com/p/smscgateway/ )

 

so, i can't compile : org.mobicents.smsc:oam:jar:1.0.0.ALPHA-SNAPSHOT

 

Thanks

 

Ludovic

On Wednesday, July 11, 2012 12:00:07 PM UTC+2, Amit Bhayani wrote:

Please show us error here.

Amit.