Accessories

Table of contents

1. 1. Headsets
      1. Headsets für VoIP-Phones
      2. Headsets für ISDN-Phones
      3. Manufacturer
         1. Base-Headset for all Phonetypes
         2. Jabra
         3. Plantronics
   2. conference Phones
      1. VoIP-Conference Phone Cisco CP-8832
      2. VoIP-Konferenztelefon Cisco CP-8831
      3. Conference Phones in the ISDN-TC-System
   3. Keymodul with Speed-dial
      1. VoIP Cisco Key-Expansion-Module (BEKEM) for CP-8851
      2. VoIP Cisco Audio-Key-Expansion-Module (A-KEM) for CP-8851
      3. VoIP Cisco Color-Expansion-Module (CKEM) for CP-8961
      4. ISDN OptiPoint 500 Keymodul
   4. wireless Phones
      1. VoIP-Wifi-Phone Cisco CP-8821
      2. Wifi-Phones in the ISDN-TC-System (DECT-Phones)

Headsets

Both for Siemens-Phones and Cisco-VoIP-Phones a multitude of headsets are available as accessories. They can be wired or wireless (Bluetooth/DECT), with different mounts and monoaural or biaural (with one or two earpieces). There are many manufacturers and possibly needed adapters. Headsets are optional accessories and have to be procured and financed by the User. ZIH-NK has to be informed about the planed usage to make possibly needed changes to the TC-system settings.

Headsets für VoIP-Phones

Cisco-Phones come with an integrated headset jack. Many headsets are delivered with an appropriate cable/adapter. The ElectronicHookSwitch-feature (EHS - answering a call on the headset without pressing a button on the phone) works with wireless headsets for the 8851/8961 phones with suitable USB-headsets. For 7841/6945 phones a special EHS-cable is needed. Please note that connecting a headset via USB to 8851/8961 phones with a key-module is not possible for some headsets. The 8851 phone supports bluetooth and can be operated using a bluetooth-headset.

Headsets für ISDN-Phones

Siemens OptiPoint 500 Basic and Standard need an adapter (Acoustic-adapter) for connecting to a headset. OptiPoint 500 advance comes with an integrated headset jack.

Manufacturer

Base-Headset for all Phonetypes

Pearl.de offers a simple and inexpansive headset ("Callstel Headset PE-4603 incl. Connectorbox für Tischtelefone"), which is compatible to 90% of all phones on the market. This headset is either connected to the headset jack of the phone or is set up between receiver and phone. The included connector box adapts the headset to the phone and amplifies the signal (2xAA battery or separately sold 6v-power adapter). The headset does not offer any advanced features like noise suppression or volume limits but for about 30 Euro it offers acceptable sound and voice quality. The headset was tested with the following ISDN and VoIP Phones: Cisco CP-7841/6945 and Cisco CP-8851/8961, Siemens Optipoint500, Euroset/Gigaset 5020, Gigaset DA610.

Jabra

Suitable headsets from Jabra can be found in the Headset Compatibility Guide.

Plantronics

Suitable headsets from Plantronics can be found in the Compatability Guide on the manufacturer's website.

conference Phones

For phone calls with multiple participants (e.g. in a conference room) the speakerphone mode of the standard phones offer only limited performance. That is why there are special Conference Phones from different manufacturers with improved audio and options, e.g. the usage of microphones.

VoIP-Conference Phone Cisco CP-8832

Cisco CP-8832

VoIP-Konferenztelefon Cisco CP-8831

Cisco CP-8831

The CP-8832 / CP-8831 can be requested in justified cases from the ZIH.

Conference Phones in the ISDN-TC-System

In the ISDN-TC-System, only phones with an analogue (a/b) interface are recommended by the ZIH. ISDN-Conference-Phones are not suitable. Analogue Conference-Phones can be found from many manufacturers, e.g. POLYCON or KONFTEL. Procurement and financing has to done by the institute. ZIH-NK has to be informed about the planed usage to make possibly needed changes to the TC-system settings.

Keymodul with Speed-dial

For the secretary phones, a special key-module can be used, which provides additional speed-dial-slots, if needed.

VoIP Cisco Key-Expansion-Module (BEKEM) for CP-8851

VoIP Cisco Audio-Key-Expansion-Module (A-KEM) for CP-8851

VoIP Cisco Color-Expansion-Module (CKEM) for CP-8961

ISDN OptiPoint 500 Keymodul

wireless Phones

VoIP-Wifi-Phone Cisco CP-8821

Wifi-Phones are special phones and are only used in justified cases. As optional accessory a desk-charger (incl. hands-free-mode) is available on request.
Notes for Wifi-Phones
Audio quality depends on several factors. For optimal performance, the signal should be at least three bars. Wifi is only available in some parts of buildings. If you leave the covered area, the phone has to register again. This can take up to several minutes! Note that your call may be suspended when you enter an area with insufficient signal strength.

Wifi-Phones in the ISDN-TC-System (DECT-Phones)

DECT-Phones are also special phones, which have to be financed and procured by the user. Phones must have an analogue interface (not ISDN!) and have to offer extension features (a R-button for putting calls though with programmable flash-time). Gigaset-Phones have proven to be suitable. ZIH-NK has to be informed about the planed usage to make possibly needed changes to the TC-system settings. The provision of the number- / name- display depends on the existence of an assembly unit with CLIP-function. This is not the case everywhere, so we recommend asking us beforehand.