Normalization script to remove codecs for range of extensions

[jeesemon.91]

Hi all

    For an issue that we are facing found that SIP normalization script will be a resolution. Here my goal is to restrict all video codecs for a particular range of extension.

Found a script from cisco dev guide to remove the codecs. But i need the script for particular range of extension.  
Can someone please help on this ?

M = {}

function M.outbound_INVITE(msg)
     local sdp = msg:getSdp()

     if sdp
     then
        sdp = sdp:removeLine("a=rtpmap:", "G729")
        msg:setSdp(sdp)
     end
end
return M

[Anthony Holloway]

To help nudge you in the right direction, but not straight out give you a solution, look to the following two items:

1) store a reference to the From header

from = msg:getHeader("From")

2) check if the the from number is in the from

if string.find(from, "2001")