Wireless VoIP Phone Unify OpenScape WL4 — WLAN handset for voice-over-IP

Unify OpenScape WLAN Phone WL4 is a wireless VoIP handset for voice-over-IP communication over IEEE 802.11a/b/g/n/ac networks. The cordless phone supports standard SIP-based call signalling and secure media transport with RTP/SRTP, includes Bluetooth connectivity and a color LCD for call handling and device configuration. The device is available in black and is suitable for environments that require mobile voice communication within WLAN coverage.

Advantages

The WL4 supports common voice codecs (G.722, G.729, G.729a, G.711u, G.711a) and offers hands-free operation and Bluetooth integration for headsets or data pairing. With SIP, RTP and SRTP support it integrates into IP telephony systems and provides encrypted media transport where needed. The IP44 protection rating and wireless standards compliance ensure interoperability and basic environmental resistance.

Suitable for

• Office environments requiring mobile VoIP handsets
• Retail stores and service counters with need for cordless voice communication
• Healthcare facilities where staff move within WLAN coverage
• Light industrial areas requiring IP44-rated wireless phones

Key specifications

• Product type: Cordless VoIP phone with Bluetooth interface
• Wireless standards: IEEE 802.11a/b/g/n/ac (Wi‑Fi)
• VoIP protocols: SIP, RTP, SRTP
• Voice codecs: G.722, G.729, G.729a, G.711u, G.711a
• Hands-free speakerphone: Yes
• Display: Color LCD
• Color: Black
• Number of wireless handsets: 1
• Protection rating: IP44
• Manufacturer MPN: L30250-F600-C327

How to use

Connect the WL4 handset to a compatible WLAN network configured for your VoIP system. Register the device to your SIP server using the provided credentials and set codec preferences as required. Use the color LCD to navigate call menus, manage contacts and configure Bluetooth pairings for headsets. For hands-free operation, enable the speakerphone during a call or pair a Bluetooth headset.

Recommendations

Place access points to ensure stable IEEE 802.11a/b/g/n/ac coverage in operational areas and configure QoS on the WLAN to prioritise voice traffic. Use SRTP where security of media streams is required, and follow manufacturer guidance for cleaning and mounting to maintain the IP44 protection level.