why can't i rank higher for a cetain keyword?

I run a voip hardware site and I would like to be able to rank higher for ' sip phones' or 'phones for asterisk' . I currently am on the first page for google with the keywords 'voip hardware'. How can I rank higher for the other words..

my site is http://www.astawerks.com

Thanks

 

well you stand for the keyword 'voip hardware' first beacuse its in your signature add the other words too to get them listed on the first page .

Godd list of backlinks you have all from the voip related websites try to use the anchor 'sip phones' that will get you up soon

and do you know any cheap voip reseller packages like to call world wide??

 

no really but i use http://connect.voicepuilse.com to make my voip calls with asterisk. check them out.

 

Did you increase your rank somehow? Let us know.

 

you should write some useful articles and to submit them into sites with high pr, link with the keywords you want to rank for.

 

Somtimes you will rank higher because you don't recieve a high traffic or your content is not relevent to Higher adwords