Dahdi show channels "pseudo"

Hi
i am using asterisk 1.4, while typing the dahdi show channels i am getting extra names lije pseudo
what is it how to get rid of this

dahdi show channels
Chan Extension Context Language MOH Interpret
pseudo default default
pseudo default default
pseudo default default
pseudo default default
pseudo default default
1 trunkinbound default
2 trunkinbound default
3 trunkinbound default
4 trunkinbound default
5 trunkinbound default
6 trunkinbound default
7 trunkinbound default
8 trunkinbound default
9 trunkinbound default
10 trunkinbound default
11 trunkinbound default
12 trunkinbound default
13 trunkinbound default
14 trunkinbound default
15 trunkinbound default
17 trunkinbound default
18 trunkinbound default
19 trunkinbound default
20 trunkinbound default
21 trunkinbound default
22 trunkinbound default
23 trunkinbound default
24 trunkinbound default
25 trunkinbound default
26 trunkinbound default
27 trunkinbound default
28 trunkinbound default
29 trunkinbound default
30 trunkinbound default
31 trunkinbound default

Howdy,

You can’t. You’re always going to have a pseudo channel available from DAHDI.

Cheers.

what does that pseudo means

It’s a virtual channel built for the purposes of mixing audio.