AT&T Merlin 820 Service And Maintenance Manual page 65

Trouble on More Than One Voice Terminal
STANDARD MODULAR
TELEPHONE
(POWER FAILURE
TRANSFER
TELEPHONE)
Figure 30—Connections to Test Line Cords
Step 15. Switch the modular line cord connected to the standard modular telephone
and a line cord of the line with no trouble (see Figure 31).
STANDARD MODULAR
TELEPHONE
(POWER FAILURE
TRANSFER
TELEPHONE)
Figure 31—Showing which Line Cord to Switch
Page 62
820 CONTROL UNIT
D4CH MODULAR
LINE CORD
SWITCH THIS CORD
WITH ONE WITH NO
TROUBLE
D4CH MODULAR
LINE CORD
D4CE LINE
EXTENSION
CORD
NETWORK
INTERFACE
D4CE LINE
EXTENSION
CORD
NETWORK
INTERFACE