How to terminate incoming call with out DID and callerid to perticular sip ext

Dear All,
Could some figure out how to setup the incoming route setup on individual channel group or channel no base with out DID or Caller id information. I have tdm401 card (all FXO )on asterisk 1.8.x which is interconected old legacy PBX. I want to dump different channel to different sip extension.The legacy pbx don’t provide any caller id information. Please help me ?


you will need to use the context from-analog (the new version of from-dahdi or from-zaptel) and assign pseudo DID’s to each channel.

(What exactly is a TDM401?)