Auto dialplan entries not from extention.conf

Hi,

I have a trivial peace of dialplan for exten 100. I try to change it
to _1XX and the asterisk act according to a different (Default??) dial
plan and not the one I want.

I see in CLI> dialplan show 100@default the following 3 lines:

‘100’ => hint: SIP/100&IAX2/100 [pbx_config]
1. Dial(${HINT}) [pbx_config]
’_1XX’ => 1. Playback(digits/4) [pbx_config]

From where come the 2 first lines?? I only have the third one as the only one under my default context at extention.conf.

And what is [pbx_config]?

Thanks

Eyal

Posting that part or your extensions.conf would help.