Author: cyberco

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Case Studies

Outdoor pursuits company.

We were approached to supply  a hosted PBX solution to a Southwest England based Outdoor pursuits company replacing their on site AsteriskNow system with a more manageable and streamlined hosted Elastix based solution.

This gave them the ability to have handsets located where ever they were needed and add handsets easily with the user friendly Elastix interface. It also gave them increased viability of call usage with the inbuilt reporting and FOP2 let them see users engaged on calls.

We ported their existing BT Analogue lines to Gradwell VoIP trunks, This gave them an immediate increase in call capacity and combined with inclusive landline and mobile call packages meant call costs were kept under control.

Categories
Handsets

Snom Handsets

We Supply the full Snom range of handsets and feel that they provide both solid reliable business handsets to  touch-screen handsets that integrate with door-entry systems and much more.

 

 

For full details of handset features click on the handsets image

 

 

Snom 710 £80 inc PSU
Snom 720 £145
Snom 870 £165
Snom 821 £190
Categories
Case Studies

Xorcom Solution for Kensington Office

An existing client was moving offices from Carnaby St London to Kensington, Since the original system was installed the usage had changed with the majority of staff now being based in South Africa where we also have remotely installed an Asterisk solution previously.

For the new kensington office it was decided to use a Xorcom IPBX as this single box solution would make management easier and as ISDN2 Lines were required the overall cost would be lower than using a dedicated server and ISDN2 gateway.

xr2000-analog-250

The system was preconfigured and tested in our Lab and then taken to site and installed in one day. The clean interface allows for easy addition of handsets using the endpoint manager.

Since the company make a large volume of international calls it was decided to use Gradwell for outgoing calls as this means a great saving over BT for call charges. They also had a EFM circuit installed for both Voice and office internet usage.

Categories
Handsets

Gigaset Handsets

All the Gigaset DECT bases and handsets we sell are compatible with each other, but some handsets may only offer basic or limited compatability find out more information contact us

 

 

For full details of handset features click on the handsets image

 

Categories
Handsets

Aastra Handsets

The Aastra 67XXi Series offers features and flexibility in an open-standards based, carrier grade IP telephone. Click on the handsets for more details.

 

 

For full details of handset features click on the handsets image

Aastra 6739i £
Aastra 6737i £165 +vat
Aastra 6735i £145 +vat
Categories
Knowledge Base

Trusting Linux servers

This hopes to explain in simple steps setting up a pair (or more) servers as a trusted group.
So what do we want to achieve ? Well we wnat to be able to ssh, sftp, rsync etc between servers and not need to enter passwords
Steps required
1 Hosts File
2 Editing sshd_config
3 Create the ssh keys
4 Setting up the Auth. users file
Hosts File

Firstly we need to make sure all servers are in the hosts file
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost
127.0.0.1 asterisk2.local
# We point to eth0 on our own box
192.168.10.100 asterisk2.local
192.168.10.100 asterisk2
# We point to eth1 on the other box
192.168.10.108 asterisk1

Editing sshd_config

Now we need to edit the /etc/ssh/sshd_config file
so that the following

RSAAuthentication yes
PubkeyAuthentication yes
AuthorizedKeysFile /root/.ssh/authorized_keys

replaces

#RSAAuthentication yes
#PubkeyAuthentication yes
#AuthorizedKeysFile .ssh/authorized_keys

Now restart the sshd
/etc/init.d/sshd restart

Create the ssh keys

We now need to create the keys on each server
ssh-keygen -t rsa
and hit return for all the questions.
this will create 2 files in /root/.ssh

go the /root/.ssh directory and copy the id_rsa.pub to the other server and get its id_rsa.pub

sftp asterisk1

put id_rsa.pub asterisk2.pub
get id_rsa.pub asterisk1.pub
bye

Setting up the Auth. users file

In the /root/.ssh directory you will now have for example :-

asterisk1.pub id_rsa id_rsa.pub known_hosts

We now need to copy the asterisk1.pub to the authorized_keys file

cat asterisk1.pub >> authorized_keys

Do the same on the other server.

You should now be able to ssh and rsync between servers.

Categories
Gateways

Xorcom Astribank

Astribank is a versatile and powerful channel bank that was specifically designed for the Asterisk IP-PBX. Astribank supports all the common telephony lines and trunks: FXS, FXO, BRI, E1/T1 PRI, T1 CAS and E1 R2. The Astribank driver is a part of the standard Asterisk distribution.

DataSheet

Categories
Knowledge Base

Sip debugging with wireshark

Wireshark and Cloudshark are invaluable tools for debugging sip and iax issues on your Asterisk server.

Here we have a short Video that goes over the basics of getting a call captured and opened in Cloudshark

we also have a short tutorial for download here in PDF format

First we need to get the packets we want. This is far simpler than its thought. We use a simple command line tool called tcpdump, if its not installed install it now, You wont be able to live without it.

Here we have 2 commands, The first captures packets on interface eth0, -n means we won’t convert addresses, -w means we just capture raw packets and udp means its only the udp packets we want and finally port 5060 means its only the sip messaging we want. In the second we dont specify port 5060 so that we get the rtp stream as well.

/usr/sbin/tcpdump -n -i eth0 -w /tmp/wireshark.pcap -s2000 udp port 5060
 /usr/sbin/tcpdump -n -i eth0 -w /tmp/wireshark.pcap -s2000 udp
screen -S "udpDump" -dm tcpdump -n -i eth0 -C 9 -W 15 -w /var/log/asterisk/dumpsip.pcap -s2000 udp port 5060

The command above will write to file in the background and will rotate at 9 meg so suitable for cloudshark

Once you have started the capture and made a call as required you will get a file called for example /tmp/wireshark.pcap copy this to your workstation via ftp or sftp as you would copy any file.

Categories
Products and services Services Support

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Categories
Asterisk Support Elastix Support Knowledge Base

Backing up to Amazon s3 from Elastix

We decided to do this as we have recently installed a new elastix server in the office which had limited disk space and wanted to keep offsite backups of recordings

s3cmd is a command line client for copying files to/from Amazon S3 (Simple Storage Service) and performing other related tasks, for instance creating and removing buckets, listing objects, etc.

Install s3cmd

wget http://sourceforge.net/projects/s3tools/files/s3cmd/1.5.2/s3cmd-1.5.2.tar.gz
 tar -xzvf s3cmd-1.1.0-beta3.tar.gz
 mkdir /usr/local/s3cmd/
 cd s3cmd-1.1.0-beta3
 cp -Rf * /usr/local/s3cmd/
 cd /usr/local/s3cmd/
 ./s3cmd --configure

Follow the prompts and enter your keys.

Test the installation
./s3cmd ls s3://yourbucket/

If the test works then the script below is a simple backup script to backup elastix monitor files and backups daily.

vi /etc/cron.daily/rec2s3c.sh

#!/bin/sh
 /usr/local/s3cmd/s3cmd --config=/some/where/.s3cfg sync /var/spool/asterisk/monitor s3://yourbucket
 /bin/rm -f /var/spool/asterisk/monitor/*.gsm
 /bin/rm -f /var/spool/asterisk/monitor/*.wav
 /usr/local/s3cmd/s3cmd --config=/some/where/.s3cfg ls s3://yourbucket/monitor/ > /var/log/s3dirlist.log
 /usr/local/s3cmd/s3cmd --config=/some/where/.s3cfg sync /var/www/backup s3://yourbucket
 /usr/local/s3cmd/s3cmd --config=/some/where/.s3cfg ls s3://yourbucket/backup/ >> /var/log/s3dirlist.log

 

enjoy :-)

For more details of what can be done with s3cmd see http://linux.die.net/man/1/s3cmd and http://aws.amazon.com/s3/