User`s guide

Battery Installation and Removal
(WTM652G only)
Many Telephony Modem models support an optional Lithium-Ion backup battery.
The WTM652G 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 (recommended battery) or black.
• 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.
• 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).
Touchstone WTM652 Telephony Modem User’s Guide
Safety
Getting
Started
Battery
Installation
Installation
Wireless
Configuration
Ethernet
Configuration Usage Troubleshooting Glossary
14