Cordless SIP phones (that work with a VoIP network) offer the convenience of being able to step away from your office desk. They are a good choice for people who prefer talking into a handset over using wireless headphones.
Cordless phones are also know as DECT phones. DECT stands for Digital Enhanced Cordless Technology. The DECT technology allows the handset to connect wirelessly to a base station. The base station provides the connectivity to the SIP network. The talk range between handsets and the base station can be doubled with a repeater. Repeaters can also circumvent thick walls and other obstructions to help with indoor reception issues.
A base station is not limited to one cordless phone. It can handle multiple accounts and handsets (extra handsets need to be bought separately). Each handset can, in turn, handle several calls simultaneously.
When setting up cordless phones, in most cases you would want a separate phone number for each handset, but there is also an option to share numbers among several workers.
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| -- | W52P | W56P |
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| Range indoor / outdoor | 165 / 1000 feet | 165 / 1000 feet |
| Max handsets | 5 | 5 |
| Numbers / accounts | 5 | 5 |
| Simultaneous calls | 5 | 5 |
| Max Network speed | 100 Mbps | 100 Mbps |
| Talk time per charge | 10 hours | 30 hours |
| Standby time per charge | 100 hours | 400 hours |
| Battery type | 2 AAA Ni-Mh | Lithium |
| Additional handset model | W52H | W56H  |
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| Repeater | RT20U 5 units per base station. 2 simultaneous calls.  | RT20U 5 units per base station. 2 simultaneous calls.
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