[Asterisk-Users] Extensions / Contexts

[Sebastian Silva]

Hi everybody,

I am writing here because I can't find the solution to my problem (my 
asterisk configuration). I hope somebody can give me a hand with it:

I need to provide a PBX service to several companies (extensions with 
softphones and Digium hardware to manage the analog lines), my problem 
is that I don't know how to configure the contexts to have, for 
instance, the following scenario:

Company A
ext 2000
ext 2001
ext 2002

Company B
ext 2000
ext 2001
ext 2002

Company A must not to see extensions of company B and viceversa.

I know this is possible with extensions, but I don't know how to 
distinguish when (for example) a sip phone is connecting to the 
extension 2000 from company A or company B.

It is possible to configure my sip.conf (or iax.conf) like this? If it 
is, how do I need to configure the softphone? Does Asterisk realizes 
which context to use depending on the username? Does asterisk allows two 
extension sections with the same number?:

[2000]
username=companyA_2000
context=contextCompanyA

[2000]
username=companyB_2000
context=contextCompanyB

Any help will be appreciated.
Sebas

-- 
Sebastian Silva
G R U P O  G A U S S
Depto. Sistemas
Av. Libertador 6250 4 piso
Tl.: 4 706-2222 (int. 121)
ssilva at gaussar.com