PairGain 150-1559-01, Manual, Page: 8 / 16

Testing a Circuit 150-101-100-02, Revision 02
4 June 8, 1999 HTC-439 List 1
Table 1. Test Connections
Connect Pin Number To Pin Number
Loopback - This switch position connects the following circuits
CO Tip 6 CO Tip 9
CO Ring 5 CO Ring 8
Field Tip 4 Field Tip 12
Field Ring 3 Field Ring 11
Loopthru - This switch position connects the following circuits
CO Tip 6 Field Tip 4
CO Ring 5 Field Ring 3
CO Tip 9 Field Tip 12
CO Ring 8 Field Ring 11
Short - This switch position connects the following circuits
CO Tip 6 CO Ring 5
CO Tip 9 CO Ring 8
Field Tip 4 Field Ring 3
Field Tip 12 Field Ring 11
Open - This switch position removes all connections between the circuits