Battery Installation and Replacement
(TM722G Only)
The TM722G Telephony Modem may optionally include a Lithium-Ion battery to pro-
vide backup in the event of a local power loss. The battery backup is not intended
to take the place of AC power.
Note:
For safety and regulatory purposes, batteries are shipped outside of the
Telephony Modem and must be installed.
The TM722G supports the following battery models:
•
Basic backup battery
— provides up to 5 hours (black) or 8 hours (grey)
of backup time, depending on your Telephony Modem model and usage. It
may be light grey or black.
Basic Battery Installation and Replacement
•
Extended backup battery
— provides up to 12 hours of backup time, de-
pending on model and usage. It has a strap between the battery guides.
Extended Battery Installation and Replacement
•
Maximum backup battery
— provides up to 24 hours of backup time, de-
pending on model and usage. It replaces the battery door, and increases the
height of the Telephony Modem by about 5/8 inch (16 mm).
Maximum Battery Installation and Replacement
Touchstone TM722 Telephony Modem User’s Guide
14
Basic Backup Battery
Extended Backup Battery
Maximum Backup Battery
