This is highly cost-effective way to connect two SFP/SFP+ devices (for example two units of CCR1036-8G-2S+) for very short distances, within racks and across adjacent racks.rnrnInterfaces:rnR52Hn, R11e-2HPnD, R11e-5HacD, R150-IPEX-NF, ACMMCX, ACRPSMA, ACMMCXRPSMA, LL-NM-SMA, IPEXRPSMA, SC-FC-UPC-D-SM-3M, LC-FC-UPC-D-SM-3M, LC-FC-UPC-D-SM-10M, S+DA0001, S+DA0003, S-RJ01, MTAD-5G-30D3, MTAD-5G-30D3-PA,