The ICA SR supports distances up to 150 meters (492 feet) and a link data rate of 8 GBps.  OM3 fiber optic cable is used for distances up to 100 meters (328 feet), and OM4 or OM5  for distances up to 150 meters (492 feet). ICA SR supports four CHPIDs per port and  seven subchannels (devices) per CHPID. ICA SR supports transmission of Server Time  Protocol (STP) messages. The coupling link options are listed in Table 4-8. GLYPH<SM590000> Coupling Express Long Reach: Coupling Express LR (FC 0433) is needed for Long  Distance Coupling z14 ZR1/z14 M0x/z13/z13s to z13 and above. It supports a maximum  unrepeated distance to 10 kilometers (6.2 miles) and up to 100 kilometers (62 miles) with  a qualified DWDM. CE LR coupling links are defined as CHPID CL5. CE LR uses same  9 µm single mode fiber cable as 1x IFB. Type Description Use for  connecting Link rate Distance z14 ZR1  maximum  number  of ports CE LR Coupling  Express LR z14/z13/z13s to  z14/z13/z13s 10 Gbps 10 km unrepeated (6.2 miles) 100 km repeated (62 miles) 32 ICA SR Integrated  Coupling  Adapter z14/z13/z13s to  z14/z13/z13s 8 GBps 150 meters  (492 feet) 16 IC Integrated  Coupling  Adapte r Internal  communication Internal  speeds N/A 32 Table 4-8 Coupling link options that are supported on z14 ZR1 Figure 4-4 z14 ZR1 Parallel Sysplex coupling connectivity The maximum number of combined external coupling links (active CE LR, ICA SR links) is 44  per z14 ZR1 server. z14 ZR1 servers support up to 176 coupling CHPIDs per CPC. A z14  ZR1 coupling link support summary is shown in Figure 4-4. 154  IBM 14 Model ZR1 Technical Guide