Power backup for your phone (Physical line)
Guide reference: HG-0182
Quote this reference if you contact us about this guide.
Approx. 3 min read
Battery backup for a Physical line router or adapter box. For Physical line customers. A
Don't worry if power cuts concern you. On a Physical line, a battery backup unit can keep your router or adapter box running for a limited time.
Quick answer
A battery backup unit can keep your Physical line router or adapter box running for a limited time during a power cut.
More detail
A battery backup unit can keep your Physical line router or adapter box running for a limited time during a power cut.
A battery backup unit, sometimes called a UPS, keeps the router or adapter box running when mains electricity fails.
Backup time is limited. Many units give from about 30 minutes to a few hours, depending on the model and your box.
The backup powers the router or adapter only, not the whole house and not cordless phone base stations.
Keep a charged mobile phone as a second way to reach 999.
What you'll need
- Compatible battery backup unit if you buy one
- Your router or adapter box make and model
- Optional charged mobile phone
Before you begin
- Do not use unapproved batteries or power units that could damage the box.
- Battery backup is optional. A charged mobile may be enough for your household.
Plan battery backup on a Physical line
Read emergency calls during a power cut first so you understand the limits of digital phone services.
Decide whether you need the home phone to work briefly during cuts, or whether a charged mobile is enough for 999.
Note the make and model of your router or adapter box.
Ask us about compatible battery backup for your box.
Follow the maker instructions to connect the backup unit to the box.
Test once safely by unplugging mains briefly and checking dial tone still works for the rated time.
Tell carers or family where the backup unit is and how long it lasts.
What success looks like
When mains power is removed briefly during a safe test, the box stays on and dial tone remains for the backup rated time.
Common mistakes
- Expecting a small backup unit to power the box all day.
- Never testing backup until a real power cut.
- Plugging kettles, heaters, or cordless bases into the backup unit.
Frequently asked questions
How long does backup last?
It depends on the unit and your box. Often from about 30 minutes to a few hours for the box only.
Does Simple Telecoms supply backup?
Ask us when you order. Some customers buy an approved unit separately.