OpenScape WLAN Phone WL4

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Unify WL4 Front with menu.png

The OpenScape WLAN Phone WL4 telephones are an advance variant of telephones for mobile workplaces that use WLAN technology for transmission. These telephones can be deployed in environments with the appropriate SIP platforms and use WLAN infrastructure which supports the dominant infrastructure standards IEEE 802.11a/b/g/n/ac. The OpenScape WLAN Phone WL4 supports now not only wireless telephony, but also messaging and alarming as options.

The OpenScape WLAN Phone WL4 family consists of:

  • the handsets: OpenScape WLAN Phone WL4 and OpenScape WLAN Phone WL4 Plus
  • the tools: Portable Device Manager (PDM) and Wireless Service Gateway (WSG)
  • different chargers and accessories

Communication with the platforms is enabled through SIP.

Key Features

The following information provides an first overview. This list is not exhaustive. Please refer to the detailed operating instructions for more information.

Portfolio Elements

The OpenScape WLAN Phone WL4 handset family consists of two telephone models:

  • the OpenScape WLAN Phone WL4 is the entry telephone for VoWLAN telephony,
    • an additional message license can be applied to this telephone to benefit from the advanced messaging functionality
  • at the top of the product offering stands the OpenScape WLAN Phone WL4 Plus, it offers not only VoWLAN telephony, but also messaging and personal alarm functionality.

Description of Features of the OpenScape WLAN Phone WL4


  • Weight: 135 g (excluding clip)
  • Color: Black
  • Dimensions (l × w × d): 137 × 52 × 21 mm
  • Display size (w × h): 31 x 41 mm
  • Battery Type: Li-polymer, 3.7 V, 920 mAh


  • Multi-purpose connector for battery charging, software download and configuration
  • Headset connector: 3.5 mm standard jack

User interface

  • Display:
    • TFT display with multiple colors with high resolution
    • 240 × 320 pixel LCD
    • white LED backlighting
    • Indication of call states, voice mails, messages etc. in the display
    • Display languages: Multi Language User Interface in 20 languages, those are: Arabic, Chinese (simplified), Czech, Danish,

Dutch, English, Finnish, French, German, Greek, Hungarian, Italian, Norwegian, Polish, Portuguese (Brazilian), Russian, Slovak, Spanish, Swedish and Turkish The interfaces of the admin./management tools are in English language


  • 12 dial keys (3x4): 0-9, # and *
  • 3 Soft keys for dynamic feature access
  • Off-hook key
  • On-hook and Power On/Off on the same key
  • Five way navigation key
  • Sound off/Mute side key
  • Volume button up/down side key
  • Multifunction button at the top
  • Hot keys ("0", "2" - "9") for fast feature access


  • Ring signal: Adjustable in 8 steps
  • Duplex loudspeaker function
  • Hearing Aid Compatible (HAC)

Phonebook options

  • Local Phonebook:
    • Maximum 250 entries
    • Selectable ring tones per contact
  • Company Phonebook:
    • Maximum 1.000 entries
  • Central Phonebook:
    • Access to LDAP (WSG required)


  • Indication: 14 ring signals, illuminated display and Silent Alarm (vibration)
  • Call list storage capacity: 25 calls (call received, dialed and missed) with time stamp
  • Voice codecs: Opus Wideband, G.711 A-law (EU), G.711 μ-law (US), G.729, G.729A, G.729B, G.722
  • SIP registration to a SIP proxy/registrar


  • Interactive messaging (telephone user can reply messages)
  • Colored messaging to prioritize messages
  • Maximum message length: 160 characters sent from OpenScape WLAN Phone WL4
  • Storage capacity: 30 received/sent messages


  • Push button alarms
  • Man-down alarm
  • No-movement alarm
  • Acoustic Location Signal
  • Location of the Handset via OSCAR

Radio Specification

  • Receiver sensitivity (typical values):
    • -87 dBm (802.11a, 6 Mbps),
    • -93 dBm (802.11b, 1 Mbps)
    • -87 dBm (802.11g, 6 Mbps),
    • -86 dBm (802.11n, MCS0)
  • Frequency range:
    • EU:
      • b/g: 2.4 to 2.4835 GHz (ch. 1 to 13)
      • a: 5.15 to 5.35 GHz (ch. 36 to 64)
      • 5.47 to 5.725 GHz (ch. 100 to 140)
    • USA:
      • b/g: 2.4 to 2.4735 GHz (ch. 1 to 11)
      • a: 5.15 to 5.35 GHz (ch. 36 to 64)
      • 5.47 to 5.85 GHz (ch. 100 to 165)
    • Canada:
      • b/g: 2.4 to 2.4735 GHz (ch. 1 to 11)
      • a: 5.15 to 5.35 GHz (ch. 36 to 64)
      • 5.47 to 5.6 GHz (ch. 100 to 116)
      • 5.65 to 5.85 GHz (ch. 132 to 165)
    • Maximum output power:
      • 100 mW / 20 dBm
    • Modulation speed:
      • b: 1, 2, 5.5, 11 Mbps
      • a, g: 6, 9, 12, 18, 24, 36, 48, 54 Mbps
      • n: MCS-0–MCS-7
      • ac: MCS-0–MCS-9
    • Bluetooth radio spectrum:
      • Output power: ISM 2.4000–2.4835 GHz


  • TCP/IP
  • IP addressing: DHCP, fixed
  • Configurable DSCP
  • DNS support (primary/secondary)
  • UDP
  • SNMP


  • Number of IP networks:
    • 4 systems, auto selection or manual selection
  • Quality of Service (QoS)
    • WMM
    • TSPEC-based Call Admission Control (CAC)
  • Supported WLAN networks
    • 802.11 a/b/g/n/ac (MCS0-7)
  • WLAN- Security
    • Security standard: 802.11i, 802.11w
  • Encryption methods: AES-CCMP
  • Authentication methods:
    • Open
    • WPA-PSK
    • WPA2-PSK
    • EAP-TLS
  • WLAN- Roaming enhancement
    • 802.11r, 802.11k
    • Opportunistic Key Caching (OKC)
    • PMKSA caching
    • CCKM


  • Supported version: 5.0
  • Supported profiles: Headset and Handsfree

Enclosure Protection

  • IP44, IEC EN60529

Headset Connector

  • 3,5 mm standard jack / wired
    • Jabra (Adapter Cabel: Jabra part number 8800-00-103)
      • Jabra BIZ 2400
    • Sennheiser
      • Sennheiser SC232
      • Sennheiser SC262
    • Plantronics
      • Plantronics HW510
      • Plantronics HW520
  • Bluetooth / wireless
    • Plantronics
      • Plantronics Voyager Legend


  • Leather case
  • Swivel-type clip
  • Security cord
  • Desktop charger, AC adapter (by geographical region)
  • Desktop Programmer (via USB) with Portable Device Manager
  • Charging rack for phones and batteries, each with 6 slots

Additional Features

  • Time and date indication
  • Customized GUI
  • 4 Profiles to quick change of WLAN settings
  • Easy replaceable battery
  • Name display in call list
  • Clear lists in charger
  • Manual and automatic keypad lock
  • integrated Site survey tool

1 This feature is available for OpenScape WLAN Phone WL4 including messaging license and for the OpenScape WLAN Phone WL4 Plus
2 This feature is available for the OpenScape WLAN Phone WL4 Plus

<!SIP Feature set with different platforms, see this link.>

Description of Features of the Portable Device Manager (PDM)

The PDM is an optional management tool for OpenScape WLAN Phone WL4 telephones. It is a software application that runs on a local Windows PC. It has a graphical User Interface (GUI) and a database containing parameters specific for each of the OpenScape WLAN Phone WL4 telephones used in the system. Examples of parameters are WLAN system parameters and VoIP service parameters. The PDM also enables firmware upgrades. Before an OpenScape WLAN Phone WL4 telephone is able to access the WLAN and any services, it must be configured with WLAN system specific parameters, for example the SSID (network identification). The parameters are synchronized with the OpenScape WLAN Phone WL4 telephones via a USB cable connected to the OpenScape WLAN Phone WL4 Desktop Programmer. The PDM Software itself is free of charge and is via the usual Software supply services available (e.g. via Unify Partner Portal), please look for OpenScape WLAN Phone WL4.

Description of Features of the Wireless Service Gateway (WSG)

The Wireless Service Gateway (WSG) is an optional web-based appliance used for device management, messaging and alarm handling. The OpenScape WLAN Phone WL4 telephones needs a basic parameter setup with the PDM, which are basic WLAN and IP settings, to be able to communicate with the WSG. Thereafter the WSG can be used to remotely and wirelessly edit parameters and update software of the OpenScape WLAN Phone WL4 telephones. It saves the parameters and software for all OpenScape WLAN Phone WL4 telephones in a database with the maximum capacity of this data base being 2.500 OpenStage WL3 or OpenScape WLAN Phone WL4 telephones.

The WSG is also required if LDAP access from the OpenScape WLAN Phone WL4 telephones and interfaces to the alarming/messaging Server OSCAR are required. The OpenScape WLAN Phone WL4 telephones must log on to the WSG to enable the messaging and alarm functions.

Each OpenScape WLAN Phone WL4 has also an own configuration menu. This menu can be used as simple option for single handset configuration.

WL4 configuration picture.jpg

Connectable Devices

The OpenScape WLAN Phone WL4 were tested with the following systems:

  • OpenScape Business, from V3
  • OpenScape Voice, from V9
  • OpenScape 4000, from V8

The interface for the solution in the platforms is SIP. One SIP user is required in the platform for each OpenScape WLAN Phone WL4 telephone; please remember the necessary SIP user licenses in the platforms mentioned above. For enabling messaging and alarming the OpenScape Alarm Response Professional (OSCAR), from V3 is required. The OSCAR needs an Open Access Protocol License (OAP) for the connection to the solution.

New feature content compared to predecessor OpenStage WL3

  • Advantages OpenScape WLAN Phone WL4 compared to predecessor OpenStage WL3
    • New mechanical design
    • New modern Wi-Fi chipset with 802.11ac
    • Voice Enterprise Roaming improvements 802.11k, 11r
    • Larger color TFT display (2,0” size, 240x320 pixels)
    • Bluetooth
    • 3.5 mm headset connector
    • Wideband audio, with HD loudspeaker and microphone
    • Improved certificate handling, SCEP
  • Keep important functionality from OpenStage WL3
    • Receiving of Messaging with WL4 Messaging (via Messaging License)
      • Message confirmation, colors, priority
    • Personal Alarm with WL4 Plus
      • Push-button Alarm, Man-down Alarm, Call after alarm
      • Wi-Fi location
      • Services and shortcuts: Send messages, Start of phone calls, Menus
    • Centralized management via WSG
    • Easy deployment
    • housing protection class IP44, for cleaning and disinfection
  • Compatibility
    • Target to keep all Wi-Fi interoperabilities
    • Support of existing:
      • WSGs, Software update needed
      • Desktop charger, multi handset rack charger
      • Desktop programmer
    • New Item:
      • New battery form: New battery and 6 slot battery rack charger

Order Information

Feature OpenScape WLAN Phone WL4 Handset OpenScape WLAN Phone WL4 Plus Handset OpenScape WLAN Phone WL3/WL4 Messaging License OpenScape WLAN Phone WL3/WL4 Desktop charger EU OpenScape WLAN Phone WL3/WL4 Desktop charger UK, US, AUS OpenScape WLAN Phone WL3/WL4 Desktop charger no power connector OpenScape WLAN Phone WL4 carrying case OpenScape WLAN Phone WL4 swivel clip OpenScape WLAN Phone WL4 standard battery OpenScape WLAN Phone WL4 rack charger for batteries OpenScape WLAN Phone WL3/WL4 rack chararger for phones OpenScape WLAN Phone WL3/WL4 security chain OpenScape WLAN Phone WL3/WL4 Desktop programmer OpenScape WLAN Phone WL3/WL4 WSG Server OpenScape WLAN Phone WL3/WL4 WSG mounting kit front OpenScape WLAN Phone WL3/WL4 WSG mounting kit reverse
Feature Number L30250-F600-C327 L30250-F600-C328 L30250-F622-C324 L30250-F600-C312 L30250-F600-C313 L30250-F600-C314 L30250-F600-C329 L30250-F600-C330 L30250-F600-C331 L30250-F600-C332 L30250-F600-C315 L30250-F600-C319 L30250-F600-C320 L30250-F600-C321 L30250-F600-C322 L30250-F600-C323
Part Number S30122-X8008-X60 S30122-X8008-X61 S30122-X8023-X516 S30122-X8008-X24 S30122-X8008-X26 S30122-X8008-X27 S30122-X8008-X62 S30122-X8008-X63 S30122-X8008-X64 S30122-X8008-X65 S30122-X8008-X28 S30122-X8008-X32 S30122-X8008-X33 S30122-X8008-X34 S30122-X8008-X35 S30122-X8008-X36


symb-docu.gif Documentation in further languages, software and other downloads can be found on
Any comments to the files provided here?



'User Documentation'

'Admin Documentation'

Firmware / Software

The SIP firmware provides encryption capabilities. Hence its distribution must follow legal requirements which do not allow unrestricted SW distribution via the Internet. The firmware is only provided by Unify technicians or by authorized Unify Partners. Customers with self-care contracts will have access to SW within the Partner Portal Web Portal (login required).

The Application software of the OpenScape WLAN Phone WL4 can be transferred to the phone:


more information to the handset portfolio from Unify

See also