Install ground-start key, Figure 2-34, Ground start key installation – AT&T System 25 User Manual
Page 107
INSTALLATION
Install Ground-Start Key
If trunks are ground start (ZTN76 used), a ground-start key must be installed
on the Power Failure Transfer voice terminals. This key can only be installed
on voice terminals that have modular jacks.
1.
Unplug modular line cord from voice terminal.
2.Plug KS23566, L1 key into voice terminal line cord jack.
3. Plug line cord into KS23566, L1 key.
KS23566 , L1 KEY
Figure 2-34.
Ground Start Key Installation
2-82
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