WS-3750G-48TS-S switches in stack mode with a max of 15.4 watts POE on each port
AIR-CAP3602E-E-K9 Wireless Access Points running 2.4 and 5GHz. Power currently being provided by switch using POE.
Cisco AIR-ANT2524DW-R (WHITE Antennas)
We wish to purchase the 802.11ac modules (AIR-RM3000AC-E-K9=) for the 3602e APs and continue to run 2.4 and 5GHz. According to the documentation (source) we need to provide 18+ watts of POE power for both 2.4 and 5GHz bands.
So we are looking at getting Cisco POE Injectors. (AIR-PWRINJ4)
Quote from the above article: Quote from the above link “Mid-span PSE—Can be used to deliver PoE if an existing non-PoE-capable Ethernet switch is used. If a mid-span PSE is used, it can only implement power delivery over the spare pairs of the copper cabling and cannot be used to deliver PoE over 1000BASE-T connections.”
Can someone confirm that we are not therefore able to use 1Gb ports on the 3750G's for the connectivity?
PWRINJ4 will work. But you need to aware of the following things:
1. PWRINJ4 doesn't dictate what speed your AP will negotiate to. The negotiated speed of your AP boils down to the configuration of your switchports and the quality of your cable. If your cable has a faulty pin, then it won't negotiate to 1 Gbps.
2. I wouldn't be bothered investing in the AC module. This is particularly true when you have multiple AC module on a single switch. Why? 802.11ac, wave 1 is capable of pushing up to 1.3 Gbps. What is your uplink speed? It just ain't worth the hassle and the trouble. You may want to look at 3700 and the soon-to-be-released 3800. AP3700 supports 802.11ac, wave 1 natively (no module required but still requires PoE+) and 3800 will support both 802.11ac wave 1 and wave 2 natively (no module required but still requires PoE+).