| 1 x RJ45 10/100M Ethernet port | |
| Power over Ethernet (IEEE 802.3af), Class 1 |
| Frequency bands | 1880 – 1900 MHz (Europe), 1920 – 1930 MHz (US), 1902 – 1906 MHz (THA) |
| DECT Standards | CAT-iq2.0 |
| Full-duplex speakerphone | |
| Hearing Aid Compatibility (HAC) compliant | |
| FNR (Flexible Noise Reduction)/Noise Cancellation | |
| Wideband codec | Opus, AMR-WB (optional), G.722 |
| Narrowband codec | PCMU, PCMA, G.726, G.729, G.729A, iLBC |
| VAD, CNG, AGC, PLC, AJB | |
| AEC (supported by W53H) | |
| Support VQ-RTCPXR (RFC6035), RTCP-XR | |
| SIP v1 (RFC2543), v2 (RFC3261) | |
| SNTP/NTP | |
| VLAN (802.1Q and 802.1P) | |
| 802.1x, LLDP | |
| STUN Client (NAT Traversal) | |
| UDP/TCP/TLS | |
| IP assignment | Static/DHCP |
| Support outbound proxy server backup | |
| Up to 20 simultaneous calls | |
| Up to 10 handsets | |
| Up to 10 SIP accounts | |
| Up to 6 repeaters per base station (RT30) | |
| No Perception Upgrade | |
| Paging/Intercom/Auto answer/Dial plan | |
| Call hold/Call transfer/Call waiting | |
| 3-way conference | |
| Switching between calls | |
| Mute/Silence/DND | |
| Caller ID with name and number | |
| Anonymous call/Anonymous call rejection | |
| Call forward | Always/Busy/No Answer |
| Speed dial/Voicemail/Redial | |
| Message Waiting Indication (MWI) | |
| Music on hold (server-based) | |
| Local phonebook for up to 1000 entries (store in the base) | |
| Remote phonebook/LDAP/XML phonebook | |
| Phonebook search/import/export | |
| Call history | All/Missed/Placed/Received |
| Direct IP call without SIP proxy | |
| Reset to factory, reboot | |
| Emergency call | |
| Broadsoft directory, BroadSoft call log | |
| Broadworks feature key synchronization | |
| Shared Call Appearance (SCA) | |
| Action URI | |
| XML browser | |
| Auto-provision via TFTP/FTP/HTTP/HTTPS/RPS | |
| Auto-provision with PnP | |
| Handset upgrade | OTA (Over-The-Air)/No Perception |
| Configuration | browser/phone/auto-provision |
| Trace package and system log export | |