The Cisco Configurator Tool shows the following models:
WS-C4948 Catalyst 4948, optnl sw, 48-Port 10/100/1000+4 SFP, no p/s USD 7,995.00
WS-C4948-S Catalyst 4948, IPB s/w, 48-Port 10/100/1000+4 SFP, 1 AC p/s USD 10,495.00
WS-C4948-E Catalyst 4948, ES s/w, 48-Port 10/100/1000+4 SFP, 1 AC p/s USD 14,495.00
WS-C4948E Catalyst 4948E, opt sw, 48-Port 10/100/1000+ 4 SFP+, no p/s USD 10,495.00
WS-C4948E-S Catalyst 4948E, IPB, 48-Port 10/100/1000+ 4 SFP+, AC p/s USD 12,995.00
WS-C4948E-E Catalyst 4948E, ES, 48-Port 10/100/1000+ 4 SFP+, AC p/s USD 16,995.00
What is the difference between WS-C4948 and WS-C4948E (not WS-C4948-E)? Is this Enhanced? Cisco.com does not display any information about 4948E. Also, a chat with a Cisco person could not answer this question.