Nortel Meridian 1 Option 11C Planning And Installation Manual page 310

Page 310 of 408 Connecting an external alarm
Figure 98
Contacts in PFTU
Table 69
Power fail transfer unit connections (Part 1 of 3)
Unit
P
F
T
1
553-3021-210 Standard 7.00
Pair Color
5T W-S
5R S-W
6T R-BL
6R BL-R
7T R-O
7R O-R
8T R-G
8R G-R
January 2002
Normal mode
Makes with 6T
and 6R
Makes with 5T
and 5R
Makes with 8T
and 8R
Makes with 7T
and 7R
Failure mode
Opens 6T and 6R
Makes with 7T and 7R
Open
Opens 8T and 8R
Makes with 5T and 5R
Open