content_image/973594.jpg
A coupling link connection between a z15 and a z14 using CS5 CHPIDs is used as an example of how to define an STP timing-only link (see Figure 9-14). 

<img src='content_image/973594.jpg'>

A timing-only link ICA SR is defined in the IOCDS similar to a ICA SR. The only difference is the control unit type, which is STP  in this case. Example 9-7 shows a sample IOCP defining the CS5 CHPID for timing-only links on the z14 side. 

ID .. * .. * SYSTEM=(3906,1),LSYSTEM=CETUS, * TOK=('CETUS',00800112E0F73906094704240118061F00000000,00* 000000,'18-03-02','09:47:04','SYS9','IODF78') RESOURCE PARTITION=((CSS(0),(CETUS0A,A),.. * (CSS(2),(CETUS2A,A),(CETUS2B,B),(CETUS2C,C),(CETUS2D,D),* (CETUS2E,E),(CETUS2F,F),(CETUS21,1),.. * CHPID PATH=(CSS(2),E0),SHARED,PARTITION=((CETUS21),(=)), * CPATH=(CSS(1),E5), CSYSTEM=ARIES,AID=20,PORT=1,TYPE=CS5 CHPID PATH=(CSS(2),E1),SHARED,PARTITION=((CETUS21),(=)), * CPATH=(CSS(1),E0), CSYSTEM=ARIES,AID=20,PORT=2,TYPE=CS5 CNTLUNIT CUNUMBR=FFFD,PATH=((CSS(2),E9,ED,E1,E4,E5,E0)), * UNIT=STP 

Example 9-8 shows a sample IOCP defining the CS5 CHPID for timing-only links on the z15 side. 

