Table of Contents
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Testing a Circuit
Connect
Loopback - This switch position connects the following circuits
CO Tip
CO Ring
Field Tip
Field Ring
Loopthru - This switch position connects the following circuits
CO Tip
CO Ring
CO Tip
CO Ring
Short - This switch position connects the following circuits
CO Tip
CO Tip
Field Tip
Field Tip
Open - This switch position removes all connections between the circuits
4
Table 1. Test Connections
Pin Number
6
5
4
3
6
5
9
8
6
9
4
12
November 12, 1999
To
CO Tip
CO Ring
Field Tip
Field Ring
Field Tip
Field Ring
Field Tip
Field Ring
CO Ring
CO Ring
Field Ring
Field Ring
150-439-102-02, Issue 2
Pin Number
9
8
12
11
4
3
12
11
5
8
3
11
HTC-439 List 2
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