Telephone Manuals & Owner Guides
Find setup instructions, battery care, maintenance and troubleshooting for ENERGY STAR certified home and business telephones — cordless phones, expansion handsets, corded phones, VoIP desk phones and conference phones. Each guide uses the model's certification data, including line type, network and wireless features, and measured standby power.
Telephone brands
Recently certified telephones
All telephones A–Z
| Model | Brand | Description | Certified |
|---|---|---|---|
| ALE-30 | Alcatel-Lucent Enterprise | VoIP desk phone | April 2025 |
| ALE-30h | Alcatel-Lucent Enterprise | VoIP desk phone | December 2023 |
| ALE-500 | Alcatel-Lucent Enterprise | Wi-Fi capable VoIP desk phone | December 2023 |
| H6W | Alcatel-Lucent Enterprise | Wi-Fi capable VoIP desk phone | December 2023 |
| AWX20004 | AT&T | cordless expansion handset | September 2014 |
| AWX22104 | AT&T | cordless phone | September 2014 |
| BL102-2 | AT&T | cordless phone | April 2024 |
| BL102-4 | AT&T | cordless phone | September 2025 |
| BL108-2 | AT&T | cordless phone | September 2025 |
| CL80103 | AT&T | cordless expansion handset | March 2015 |
| CL80107 | AT&T | cordless expansion handset | March 2017 |
| CL80114 | AT&T | cordless expansion handset | May 2018 |
| CL80115 | AT&T | cordless phone | February 2015 |
| CL82114 | AT&T | cordless phone | May 2018 |
| CL82207 | AT&T | cordless phone | March 2017 |
| CL82215 | AT&T | cordless phone | February 2015 |
| CL82218 | AT&T | cordless phone | March 2025 |
| CL82219 | AT&T | cordless phone | May 2019 |
| CL83207 | AT&T | cordless phone | March 2017 |
| CL83210 | AT&T | cordless phone | March 2020 |
| CL83215 | AT&T | cordless phone | January 2015 |
| CL84107 | AT&T | corded phone | July 2017 |
| CL84115 | AT&T | corded phone | February 2015 |
| CL84118 | AT&T | corded phone | March 2025 |
| CL84207 | AT&T | corded phone | June 2023 |
| CLP99006 | AT&T | cordless expansion handset | January 2016 |
| CRL32202 | AT&T | cordless phone | June 2023 |
| CS5119-2 | AT&T | cordless phone | June 2023 |
| CS5249 | AT&T | corded phone | May 2023 |
| CS6909 | AT&T | cordless expansion handset | January 2016 |
| DAL75211 | AT&T | cordless phone with Bluetooth | November 2021 |
| DL72119 | AT&T | cordless phone | March 2019 |
| DL72210 | AT&T | cordless phone | February 2020 |
| DL72310 | AT&T | cordless phone | June 2023 |
| DLP72212 | AT&T | cordless phone | June 2023 |
| DLP73210 | AT&T | cordless phone | June 2023 |
| EL1101-2 | AT&T | cordless phone | March 2025 |
| EL1105-2，EL1105 | AT&T | cordless phone | April 2025 |
| EL2131-11 | AT&T | cordless phone | October 2025 |
| EL50019 | AT&T | cordless expansion handset | July 2019 |
| EL51203 | AT&T | cordless phone | April 2024 |
| EL52119 | AT&T | cordless phone | March 2019 |
| EL52203 | AT&T | cordless phone | June 2023 |
| EL52206 | AT&T | cordless phone | January 2016 |
| EL52303 | AT&T | cordless phone | September 2017 |
| GL2101-2 | AT&T | cordless phone | December 2021 |
| SB67238 | AT&T | corded phone | February 2024 |
| SB67248 | AT&T | corded phone | June 2023 |
Analog, cordless and VoIP phones
- Cordless phone
- A base connected to an analog phone line and AC power, with one or more battery-powered handsets.
- Expansion handset
- An extra handset and charger that registers to a compatible cordless base.
- Corded phone
- A traditional handset on a cord; some corded bases also support cordless handsets.
- VoIP desk phone
- Connects to a computer network and phone system instead of an analog line; often powered over Ethernet (PoE).
- Conference phone
- A speakerphone with microphones designed to pick up voices around a table.
Why standby power matters for phones
Phones are plugged in all the time, so their energy use is dominated by standby power. Each watt of continuous draw adds about 8.8 kWh per year. Certified models keep standby consumption low, and VoIP phones with Energy Efficient Ethernet save additional power at the network port.
Power over Ethernet classes
| PoE class | Max power at the phone | Typical use |
|---|---|---|
| Class 1 | 3.84 W | Basic phones with small displays |
| Class 2 | 6.49 W | Mid-range phones with backlit displays |
| Class 3 | 12.95 W | Color-screen phones, expansion modules |
| Class 4 | 25.5 W | Video phones and large touchscreens (802.3at) |
Telephone FAQ
Do cordless phones work when the power goes out?
Usually not — the base needs AC power. Some models include battery backup for the base; otherwise keep a mobile phone or a line-powered corded phone for emergencies.
Can I use non-rechargeable batteries in a cordless handset?
No. Use only the rechargeable battery type the manufacturer specifies. Alkaline batteries can leak or rupture when the charger tries to charge them.
What should I check if my VoIP phone has choppy audio?
Use a wired connection where possible, make sure voice traffic is prioritized (QoS) on the network, and ask your administrator to check firewall settings for SIP and RTP traffic.