Guide for SS7 deployment over CentOS 5.3 with 1 port Sangoma card

Part 1: Installing Asterisk

1) Install the classic dependences for Asterisk/DAHDI
Install GCC: yum install gcc gcc-c++
Install SSL: yum install openssl openssl-devel 
Install Zlib: yum install zlib zlib-devel
Install Bison: yum install bison
Install source code de Linux: yum install kernel-devel
Install ncurses: yum install ncurses ncurses-devel
Install newt: yum install newt newt-devel

2) Download from www.asterisk.org to /usr/src/ and extract the tarballs
DAHDI dahdi-linux-2.1.0.4.tar.gz
      dahdi-tools-2.1.0.1.tar.gz
ASTERISK asterisk-1.4.24.1.tar.gz

3) Make the symbolic links
ln -s /usr/src/dahdi-linux-2.1.0.4 /usr/src/dahdi
ln -s /usr/src/asterisk-1.4.24.1 /usr/src/asterisk

4) Compile and install dahdi-linux,dahdi-tools and asterisk


Part 2: Installing the SS7 channel

1) Download from http://www.dicea.dk/company/downloads the chan_ss7-1.1.tar.gz

2) Extract it into /usr/src

3) Edit the Makefile

vim /usr/src/chan_ss7-1.1/Makefile

4) Replace the follow lines for pointing to dahdi and asterisk directories.

INCLUDE+=-I../dahdi/include
INCLUDE+=-I../asterisk/include

5) Uncomment the DAHDI flag

CFLAGS+=-DDAHDI

6) Compile and install it

make; make install

7) Copy the generated module to asterisk module directory

cp /usr/src/chan_ss7-1.1/chan_ss7.so /usr/lib/asterisk/modules/


Part 3: Installing Sangoma drivers

1) Download the wanpipe stable driver from Sangoma site 

wget ftp://ftp.sangoma.com/linux/current_wanpipe/wanpipe-3.4.4.tgz

2) Extract the driver on /usr/src

3) Install the classical packet dependences for Sangoma Wanpipe

    Perl developement tools: yum install perl-devel
    AWK: yum install awk
    FLEX: yum install flex
    libtermcap-devel: yum install libtermcap-devel
    
4) Install the wanpipe driver

./Setup dahdi

5) After the compilation and linking phase, choose configure only DAHDI file (system.conf) not Asterisk file (chan_dahdi.conf)

6) Finally, accept to run dahdi_cfg after wanrouter and config the services coming up on startup 


Part 4: Configuring the SS7 channel

1) Erase zapata.conf and chan_dahdi.conf because you don't need it

2) Create a symbolic link for the old device dahdi

ln -s /dev/dahdi /dev/zap

3) Edit the DAHDI configuration file

vi /etc/dahdi/system.conf

4) Change all the chanells to bchan, comment hardhdlc line

#Dahdi Channels Configurations 
#For detailed Dahdi options, view /etc/dahdi/system.conf.bak
#echocanceller=mg2,1-15
#echocanceller=mg2,17-31

loadzone=uk
defaultzone=uk

span=1,0,0,ccs,hdb3
bchan=1-31
#hardhdlc=16

5) Edit the sangoma configuration file for the span 1

vi /etc/wanpipe/wanpipe1.conf

6) Change the signalling channel from 16 to  0 (no signalling because ss7 will manage it)

TDMV_DCHAN	= 0

7) Restart the services
service asterisk stop
wanrouter stop
service dahdi stop

wanrouter start

6) Configure your chan_ss7 file according to your SS7 link data

vi /etc/asterisk/ss7.conf 

-------------------------
[linkset-siuc]
enabled => yes
enable_st => no
use_connect => yes
hunting_policy => even_mru
context => ss7
language => da
t35 => 15000,timeout
subservice => auto
variant => ITU

[link-l1]
linkset => siuc
channels => 1-15,17-31
schannel => 16
firstcic => 1
enabled => yes

[host-my_server_hostname]
enabled => yes
opc => 14000
dpc => siuc:14001,l1:14002
links => l1:1                         ;span 1 of dahdi/system.conf
globaltitle => 0x00, 0x03, 0x01, 7773
ssn => 7

6) Finally, in order to have a clean booting, add the lines to /etc/rc3.d/S99local

ln -s /dev/dahdi /dev/zap

Part 5 (Optional) Testing the SS7 link with loopback connection

1) Edit the sangoma configuration file for the span 1

vi /etc/wanpipe/wanpipe1.conf

2) Change the clock source from NORMAL to MASTER

TE_CLOCK 	= MASTER

3) Stop asterisk

service asterisk stop

3) Stop wanrouter

wanrouter stop

4) Start wanrouter

wanrouter start

5) Put a loopback RJ45 connector in the port of the board

6) Test if the led goes to green or use dahdi_tool to see the link OK

7) Enter to CLI (asterisk -r) and try "ss7 link status". The result must show INSERVICE

CENTOS*CLI> ss7 link status 
linkset siuc, link l1, schannel 16, sls 0, INSERVICE, rx: 0, tx: 3/3, sentseq/lastack: 85/85, total 806579120, 806579216

8) Remove the loopback

9) Edit the sangoma configuration file for the span 1

vi /etc/wanpipe/wanpipe1.conf

10) Change the clock source from MASTER to NORMAL

TE_CLOCK 	= NORMAL

11) Stop asterisk

service asterisk stop

12) Stop wanrouter

wanrouter stop

13) Start wanrouter

wanrouter start