How to Convert .wav Files to .gsm Files

This is how you convert wav files to gsm files used by Asterisk

for i in *.wav
do
        sox $i -r 8000 -c 1 $(basename $i .wav).gsm resample -ql
done

How to Configure Asterisk…a very basic guide!

After hours of work and frustration I was greeted with “Is that it?” by her-indoors and “Dad can we play now…this stuff is totally boring!” by the little one. Well it was worth it…

First thing get yourself Asterisk running on Centos (maybe on VMWare etc.). The following link to MiamiManni on YouTube will provide all the information on how to install the operating system and install Asterisk. This guy is brilliant! The only two files that you need to configure are the sip.conf and extensions.conf files. The following configurations should work for you. As you can see I have configured only two SIP phones in my lab.

sip.conf

[general]
port=5060
bindaddr=0.0.0.0
context=other

register => username:account_password@voip_provider_fqdn/username

[2000]
type=friend
context=my-phones
secret=a_good_password
host=dynamic

[2001]
type=friend
context=my-phones
secret=a_good_password
host=dynamic

[ext-sip-account]
type=friend
context=from-voip-provider
username=your_username
fromuser=your_DID
secret=account_password
host=voip_provider_fqdn
fromdomain=voip_provider_fqdn

qualify=yes
insecure=port,invite
nat=yes

 

extensions.conf

[globals]

[general]
autofallthrough=yes

[my-phones]
exten => 2000,1,Dial(SIP/2000,20)
exten => 2000,2,Voicemail(2000,u)

exten => 2001,1,Dial(SIP/2001,20)
exten => 2001,2,Voicemail(2001,u)

exten => 2999,1,VoiceMailMain(${CALLERID(num)},s)

exten => _X.,1,Dial(SIP/${EXTEN}@ext-sip-account)

[from-voip-provider]
exten => your_DID_Number,1,Dial(SIP/2000,20)

As said, this will provide you with just the basics.

Remember to open the following ports:

SIP 5004-5100 TCP and UDP

STUN 3400-3499 TCP and UDP

RTPSIP 10000-20000 UDP

Remember to reload asterisk in the CLI> after you make changes to the sip.conf and extensions.conf changes.

You can test trunk registration by typing “CLI> sip show registry”

 

 

Connect CentOS to Windows 7 or 2008

I needed to connect my CentOS system to a Windows 7 machine (which is in a workgroup) quickly.

• Yum install samba3x
• Yum install samba3x-client
• Yum install samba3x-swat

Once installed I was able to connect to a Windows share by typing

smbclient //WindowsNetBIOSName/ShareName –U Username (on WindowsMachine)

You should be prompted for a password for Windows user account. Using ‘get’ command I was able to copy a file to the CentOS machine.

Kaspersky Engine Does Not Update in Forefront Protection for Exchange 2010

I found that FPE Kaspersky anti-virus engine failed to update.  FPE should use the Kaspersky 8 engine and not the Kaspersky 5 engine (which has stopped being published).

1. Download the localenginemapping.cab from this location: http://go.microsoft.com/fwlink/?LinkId=196982
2. To enable Kaspersky 8, copy the localenginemapping.cab to the following location ( …\Program Files (x86)\Microsoft Forefront Protection for Exchange Server\Data\Engines\metadata). The settings will take effect automatically. The next engine update will provide the Kaspersky 8 engine.

If you need to determine your Exchange server rollup version you can run this script