Dear Ricardo,
Thank you for reaching the Small Business Support Community.
S1 and S2 are stack ports by default. You can manually reconfigure S1/S2 and S3/S4 as network ports or stack ports on Native Stacking mode. S3/S4 port speed, as network ports, are capable to run at 1G, as long as you use the correct cable type, please refer to the admin guide, page 76, for details;
http://www.cisco.com/en/US/docs/switches/lan/csbms/Sx500/administration_guide/500_Series_Admin_Guide.pdf
I hope this answers your question and please do not hesitate to reach me back if there is any further assistance I may help you with.
Kind regards,
Jeffrey Rodriguez S. .:|:.:|:.
Cisco Customer Support Engineer
*Please rate the Post so other will know when an answer has been found.
Jeffrey Rodriguez S. .:|:.:|:.
Cisco Customer Support Engineer
*Please rate the Post so other will know when an answer has been found.