Getting
Safety
Started
Basic Backup Battery
Extended Backup Battery
Maximum Backup Battery
Battery
Installation
Installation
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:
The TM822G supports the following battery models:
•
•
•
Touchstone TM822 Telephony Modem User's Guide
Ethernet
Configuration
Usage
For safety and regulatory purposes, batteries are shipped outside of the
Telephony Modem and must be installed.
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
Troubleshooting
Glossary
13