Caller ID Name

Hi all.
Im new in this forum but i’m using Asterisk few months ago.
I Have Asterisk 1.2.22 and want to know if is possible to stop sending the Caller ID Name in outgoing and incoming calls.
That is becouse i dont use IP Phones, just normal Phones with a MTA.

Thanks in advance

What is wrong with sending/receiving callerid?

try setcallerpres(unavailable) in dialplan or callingpres=unavailable in sip.conf