Page 458 of 488 Installing and cross-connecting an external alarm from a PFTU
553-3041-210 Standard 4.00 September 2007
Figure 155
Contacts in PFTU
Table 62
PFTU connections (Part 1 of 3)
Unit Pair Color Normal mode Failure mode
P
F
T
1
5T
5R
W-S
S-W
Makes with 6T and 6R Opens 6T and 6R
Makes with 7T and 7R
6T
6R
R-BL
BL-R
Makes with 5T and 5R Open
7T
7R
R-O
O-R
Makes with 8T and 8R Opens 8T and 8R
Makes with 5T and 5R
8T
8R
R-G
G-R
Makes with 7T and 7R Open
8T (R-G)
8R (G-R)
6T (R-BL)
6R (BL-R)
7T (R-O)
7R (O-R)
5T (W-S)
5R (S-W)
Normally
connected
to a
CO trunk
Normally
connected
to a
telephone
Normally
connected
to a
trunk line card
Normally
connected
to a
telephone line card
PFT 1 on PFTU
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