Battery Installation and Replacement
(TM822G Only)
The TM822G 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 TM822G supports the following battery models:
•
Basic backup battery
— provides up to 6 hours (black) or 8 hours (green)
of backup time, depending on your Telephony Modem model and usage. It
may be green 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. It
may be light grey or black.
Extended Battery Installation and Replacement
•
Maximum backup battery
— provides up to 18 hours (6-cell) or 24 hours
(8-cell) of backup time, depending on model and usage. It replaces the bat-
tery door, and increases the height of the Telephony Modem by about 5/8
inch (16 mm).
Maximum Battery Installation and Replacement
Touchstone TM822 Telephony Modem User’s Guide
Safety
Getting
Started
Battery
Installation
Installation
Ethernet
Configuration
Usage
Troubleshooting
Glossary
13
Basic Backup Battery
Extended Backup Battery
Maximum Backup Battery
