Link exchanges serve has a centre point for reciprocal linkexchanges between one webmaster and another and are a gateway to communication between the two interested parties, the service they provide can be free with minor account limitations such as only being able to make five link requests a day or fee paid giving access to the full facilities such as checking whether the website you swapped with still has your link on their site or help with building link pages for your site etc.
One fine example is Linkmarket.net. Webmasters simplysign up and enter their website details and then are added to the link exchanges directory under relevant web content categories along with search engine ranking powered by Google or Alexa. From here webmasters can browse through and find websites which have relevant web content to their site and add them to their link basket.
Once they have finished choosing which links they are interested in, they can checkout and the chosen website webmasters are then informed automatically via emailthat they are interested in exchanging links with their site and then have a specified time limit in which to decide whether to exchange links or not.
This method works both ways and webmasters will beinformed frequently via email when someone is interested and requesting to exchange links.