OpenScape Desk Phone FAQ

The Wiki of Unify contains information on clients and devices, communications systems and unified communications. - Unify GmbH & Co. KG is a Trademark Licensee of Siemens AG.

Jump to: navigation, search

In this OpenScape Desk Phone FAQ you will find answers to frequently asked questions on the OpenScape Desk Phone phone family, divided into various topics.

Read more about SIP features.



What documents are available for the OpenScape Desk Phones and where do I find them?

All OpenScape Desk Phones are shipped with a printed document in multiple languages providing brief instructions regarding installation and operation. All the others are here on this Wiki.

How do I get an overview of the features of the OpenScape Desk Phones?

What are the default passwords?

User Menu: no password
Admin Menu: 123456
Factory Reset: 124816

Security Advisory: ensure that the default passwords (both user and admin access) are changed to individual complex passwords when a phone gets into operation. This is especially important in deployment scenarios where remote administration via WBM (web-based management) is enabled.

How can I invoke a soft-Restart?

Press buttons osk-1.gif osk-4.gif osk-7.gif simultaneously and enter the admin password.

How can I invoke a factory reset?

Press buttons osk-2.gif osk-8.gif osk-9.gif simultaneously and enter the reset password.



How can I monitor the phones IP traffic?

Best way, just configure the PC-port of your OpenScape Desk Phone as a mirror of the first one and trace phones IP/SIP traffic with a network tracer running on the PC connected to the phones PC-port.

What is a phone-trace?

It is a capture of messages and activity states of the phone.

How can I get a phone-trace?

Traces section in WBM
The tracing is enabled via the Web interface, actions are then performed on the phone, during which the trace information is captured. When the desired actions have been performed, the captured trace information can be downloaded and viewed.
The file size should be set to 2.500.000 bytes. When the file size is reached, the phone save the trace file as old trace file and begins a new one. If the new one reaches the maximum file size, the old trace file will be replaced.
You should only activate a few traces and use the function "Automatic clear before start" (old files will be deleted)

Which trace-actions are available?

Default settings
Sample for SIP tracing in an E/A environment
This deals with the changing and setting of parameters within the phone database, from both the User and Admin menus.
Application framework
All applications within the phone e.g. Call view, Call log or Phonebook are run within the application framework. It is responsible for the switching :between different applications and bringing them into and out of focus as appropriate.
Application Menu
This is where applications to be run on the phone can be started and stopped.
Call log
This deals with the Call log application which displays the call history of the phone.
Call view
This handles the representation of telephony calls on the phone screen.
Certificate management
This service handles the verification and exchange of certificates for security and verification purposes.
This is involved in the passing of call related information and signaling to and from the CSTA service.
Component registrar
This handles data relating to the type of phone e.g SIP Workpoint Hi/Workpoint Lo.
CSTA service
Any CSTA messages, are handled by this service. CSTA messages are used within the phone by all services as a common call progression and control :protocol.
Data Access service
This service allows other services to access the data held within the phone database.
The desktop service is responsible for the shared parts of the phone display. Primarily these are the status bar at the top of the screen and the FPK labels.
Digit Analysis service
This analyses and modifies digit streams which are sent and received by the phone e.g. canonical conversion.
Directory service
This performs a look up service for data in the phonebook, trying to match incoming and outgoing numbers with entries in the phonebook.
DLS Client management
Interactions with the Deployment and licencing server are handled by this service.
Health service
This monitors other parts of the phone for diagnostic purposes and provides a logging interface for the other services in the phone.
The help function is handled by this service.
Instrumentation service
This is used by the Husim phone tester to exchange data with the phone for remote control, testing and monitoring purposes.
Any Java applications run on the phone will be run in the Java sandbox controlled by the Java service.
Journal service
The Journal service is responsible for saving and retrieving call history information which is used by the Call log application.
Media control service
This service provides the control of media streams (voice, tones, ringing etc.) within the phone.
Media Processing service.
This is a layer of software between the media control service and the tone generation and voice engine services. It is also involved in switching of :audio devices such as the handset and loudspeaker.
Mobility service
This handles the mobility feature whereby users can log onto different phones and have them configured to their own profile.
Openstage Client Management
This provides a means by which other services within the phone can interact with the database.
This is responsible for the phonebook application within the phone.
POT service
This service is supposed to take over control of basic telephony if the callview application fails.
Password management service
This is used to verify passwords used in the phone.
Physical interface service
This handles any interactions with the phone via the keypad, mode keys, fixed feature buttons, 4-way navigation.
Service framework
This is the environment within which other phone services operate. It is involved in the starting and stopping of services.
Service registry
This keeps a record of all services which are currently running inside the phone
Sidecar service
This handles interactions between the phone and any attached sidecars.
SIP call control
This is contains the call model for the phone and is associated with telephony and call handling.
SIP Messages
This traces the SIP messages which are exchanged by the phone. Activating the SIP messages trace requires a reboot of the device
SIP signalling
This is involved in the creation and parsing of SIP messages and communicates directly with the SIP stack.
Team Service
This is primarily concerned with Keyset operation.
Tone generation
This service handles the generation of the tones and ringers on the phone.
Transport service
The transport service provides the IP (LAN) interface between the phone and the outside world.
vCard parser service
This trace is for sending/recieving vCards via the Bluetooth interface.
Voice engine
This provides a switching mechanism for voice streams within the phone. It is also involved in QDC, Music on Hold and voice instrumentation.
Voice mail
This trace monitors the integrated Voice mail application of the phone.
Web Server service
This provides the web access to the phone.
USB Backup service
This is for the backup/restore feature via USB devices.
Voice recognition
The Voice recognition service is for the voice dialling feature
802.1x service
This is for port security (802.1x)

Error codes

When do I see the error codes?

Whenever a phone is unable to register it brings up a message (No telephony possible) together with an error code. The error code helps you to identify where the problem is.

List of error codes

Problem Detail Error code
Network Problem No network connection LI1
Not Initialised Waiting for data I1
Unable to use LAN 802.1x error LX1
Unable to use LAN Physical connection missing LP1
Unable to Register Server timeout RT2
Unable to Register Server failed RF2
Unable to Register Authentication failed RA2
Unable to Register No number configured RN2
Unable to Register No server configured RS2
Unable to Register No registrar configured RG2
Unable to Register No DNS domain configured RD2
Unable to Register Rejected by server RR2
Unable to Register No phone IP address set RI2
Survivability Backup route active B8
Survivability Backup not configured RS8
Survivability Backup timeout RT8
Survivability Backup authentication failed RA8


What codecs are supported with OpenScape Desk Phone?

- G.711 (A-Law and u-Law)
- G.729AB (OpenScape Desk Phone can decode G.729 and G.729A but encodes only with G.729A)
- G.722 wideband codec


Can I move a Mobile User between an optiPoint and an OpenScape Desk Phone telephone and vice versa?

Cross mobility is released with the following restriction: Mobility between OpenScape Desk Phone and optiPoint410/420 phones is released but please take notice of some minor restrictions/ details to be taken into account (see information below). The "mobility log-on/ log-off" is released for mobile users logging in or off from any OpenScape Desk Phone IP to optiPoint 410/420 SIP and vice versa. However: There are a few details and shortcomings to be taken into account when it comes to creating a mobile user in DLS and the interworking of default settings especially for multi-line appearance (position of the keys while using mobility and the key layout). In order to both understand and gain an overview on details to be taken into account please refer to the "Cross Mobility" document

pdf.png  SIP Mobility User - optiPoint and OpenStage Regression Test.


Accessing the LDAP server is available on OpenScape Desk Phone IP 55G and OpenScape Desk Phone IP 35G (with SW Release V3 R3 and higher).

What is the purpose of a LDAP template?

See also: LDAP on OpenScape Desk Phone

A LDAP template has to be downloaded to the phone via local phone menu or WBM, because it contains necessary information about the search attributes and the location of all user data inside the directory.

Where do I get the template from?

It is a plain txt file and must fit your directory environment. The configuration for a Microsoft Active Directory would look like this:
OpenStage LDAP TEMPLATE (v.1)
If your are not using a Microsoft AD, you have to adjust the template:
OpenStage LDAP TEMPLATE (v.1)
ATTRIB01="Last Name"
ATTRIB02="First Name"
ATTRIB03="Business phone numer 1"
ATTRIB04="Business phone numer 2"
ATTRIB05="Mobile phone number"
ATTRIB06="Home phone number"
ATTRIB08="Address 1"
ATTRIB09="Address 2"
ATTRIB10="Job function"
ATTRIB11="E-Mail address"

Configuration at the phone.

Besides the template, add the following information in the admin menu of the OpenScape Desk Phone IP: Admin --> Local functions --> Directory Settings
  • LDAP server address
  • LDAP server port
  • LDAP authentication (if Simple, add authentication information below)


Up to now, the address is saved in one single field, which makes it difficult to search for a complete address. It is up to the administrator to which subject of the Directory the address fields are matched with.

Web-based-Management (WBM)

With the WBM are changes in settings possible, which can also be performed in the phone-menu, but you have the adventage that you needn't be in front of the phone.
Trace-configuration is only possible in WBM.

User Data

Keep in mind that the user space on

  • OpenScape Desk Phone IP 55G is limited to 8 MB (total).
  • OpenScape Desk Phone IP 35G is limited to 4 MB (total).

Every picture, ringtone or phonebook entry will reduce the space left!

File limits


  • File size: 1000000 Bytes max per file
  • Number of files: no limit (memory related)


  • File size: 300000 Bytes max per file
  • Number of files: no limit (memory related)

Picture clips

  • File size: 300000 Bytes max per file
  • Number of files: no limit (memory related)


  • File size: no limit
  • Number of files: 1

LDAP Template

  • File size: no limit
  • Number of files: 1

USB support to backup/restore user data

Which OpenScape Desk Phone IP provide an USB port and what kind of USB port do they have?

The OpenScape Desk Phone IP 55G provide an USB master port.

What can I connect to this port?

You can connect an USB memory stick to back-up and restore personal data, like phonebook, ringer tones and pictures (for details see below). All data you find under SettingsUser (no admin data).

When you plug in a USB hub it is recognised and a video camera will actually work through the USB hub, but a memory stick does not work.

What USB features can I use?

  • Backup of data into USB (with a password, and then it is encrypted)
  • Restore of data from USB (with a password, and then it is decrypted)
  • Encryption/Decryption of the backup data (storing on USB memory stick and loading data from USB memory stick is encrypted)
  • Replace backup
  • Delete backup
  • HotPlug device
  • ColdPlug device
  • Getting product name (the phone is told the USB device name)

Can I store more than one phone configuration on an USB memory stick?

Yes. It depends only on the size of memory of the USB memory stick.

Logo (Background picture)

How can I put my own company logo or background picture on the phone?

This can either be done by local phone menu or Webbased management. The logo file has to be placed on a FTP server, where the phone can download it.

What file types are supported?

OpenScape Desk Phone IP 55G supports PNG and JPG format, but PNG is the preferred file type because of the transparency feature.
A logo file has to be resized to 240 x 70 pixel
For a HowTo, see Administration Manual OpenScape Desk Phone OpenScape Voice.

How can I return to the default logo?

If you like to return to the standard logo (Unify) feel free to download the respective file and deploy it to the phone.
Below you can find all default logo files for OpenScape Desk Phone IP 55G:
Design: Silver Blue, PNG:

OpenStage 60 logo Silver Blue.png

Design: Anthracite Orange, PNG:

OpenStage 60 logo Anthracite Orange.png


Can I use my own pictures for the screensaver slideshow?

Yes, this is possible. Easiest way doing this, is with the help of the OpenStage Manager tool. It transfers all the pictures to the phone, makes them fit best on the screen and can help saving memory.

Which formats are supported?

The supported formats are JPG and PNG.

How many pictures can be downloaded?

This depends on the memory usage for other user data (eg. phonebook entries, ringer tones). The total memory available is limited to 8 MB.

Local phonebook

Is it possible to synchronize my Outlook contacts with OpenScape Desk Phone?

This can be done with the OpenStage Manager.

Ringer tones

What file types are supported?

In general, WAV and MIDI files are supported on all 2 phone types. Additionally, OpenScape Desk Phone IP 55G can play MP3 files.

Is there a suggestion for MP3 files?

OpenScape Desk Phone IP 55G can play MP3 files from 32 kbit/s up to 320 kbit/s (stereo and mono). Because of a limitation of the space available (8 MB in total), the following is suggested:
- mono instead of stereo sound
- a constant bitrate between 64 and 96 kbit/s
- a maximum length of 15 seconds per file
See the following table for estimated file size:
64 kbit/s (mono) 80 kbit/s (mono) 96 kbit/s (mono)
Length 5 seconds 40 KB 50 KB 60 KB
Length 10 seconds 80 KB 100 KB 120 KB
Length 15 seconds 120 KB 150 KB 180 KB

How can I download my own ringer melodies to the OpenScape Desk Phone IP 55G?

This can be done by using the OpenStage Manager. As an instance of ringtones, several MP3 files can be found here.

How can I download my own ringer melodies to the OpenScape Desk Phone IP 35G?

This can be done via FTP or Deployment Service. If you want to replace it, you need to download a new file with the same name. Of course a factory resets turns the phone in the original state and eleminates individual downloaded ringer files.
MIDI files are used instead of WAV files.
The original OpenScape Desk Phone WAV Ringerfiles can be downloaded here: zip.png  OS_Ringtones_15_20_40

Music-On-Hold (MoH)

What file types are supported?

In general, WAV and MIDI files are supported on the 2 phone types. Additionally, OpenScape Desk Phone IP 55G can play MP3 files.

Is there a suggestion for MP3 files?

OpenScape Desk Phone IP 55G can play MP3 files from 32 kbit/s up to 320 kbit/s (stereo and mono). Because of a limitation of the space available (8 MB in total), the following is suggested:
- mono instead of stereo sound
- a constant bitrate between 64 and 96 kbit/s
- a maximum length of 15 seconds
- there can only be one single Music on Hold file at once
See the following table for estimated file size
64 kbit/s (mono) 80 kbit/s (mono) 96 kbit/s (mono)
Length 5 seconds 40 KB 80 KB 120 KB
Length 10 seconds 50 KB 100 KB 150 KB
Length 15 seconds 60 KB 120 KB 180 KB

How can I download my own Music on Hold to the phone?

This can be done by using the OpenStage Manager. Only one file can be downloaded, because there is no selection of files available.

How can I get back to the factory default Music?

The file can be downloaded from here: zip.png  OpenStage Default MoH.

Platform Support

How can I connect my OpenScape Desk Phone IP to an Asterisk system?

See SIP Devices and Asterisk for further details.

See also

Show IP related