VoIP telephone sets at ETHZ

ETHZ is migrating from traditional TDM telephony to VoIP with the telephone migration. The standard device for a personal workstation is the CP600 for general telephones the CP205 or the CP100 is used. The OpenStage 40 is a 1st generation VoIP terminal and is still used as a personal terminal.

A VoIP phone has 2 UKV ports on the back of the device. The phone can be connected to one UKV port via an Ethernet patch cable. A computer can be connected directly via the 2nd port on the phone (PC icon). VoIP devices must always be plugged into the data network.

Information about the telephony replacement project: https://ucc.sp.ethz.ch/_layouts/15/start.aspx#/SitePages/Home.aspx



OpenStage 40 (EOL)

Quick User Guide

User Guide


(info) Configure call forwarding online via Phone Control Center (Important: VPN connection required).

For "impersonal" phones, authorization can be requested in the Phone Control Center via a ticket.

You can find more information about the Phone Control Center here


OpenScape Desk Phone CP600

Quick User Guide

User Guide


(info) Configure call forwarding online via Phone Control Center (Important: VPN connection required).

For "impersonal" phones, authorization can be requested in the Phone Control Center via a ticket.

You can find more information about the Phone Control Center here


OpenScape Desk Phone CP205

Quick User Guide

User Guide

(info) Configure call forwarding online via Phone Control Center (Important: VPN connection required).

For "impersonal" phones, authorization can be requested in the Phone Control Center via a ticket.

You can find more information about the Phone Control Center here


OpenScape Desk Phone CP100

Quick User Guide

User Guide

Impersonal device

Redirection is not allowed



When forwarding to an external telephone number, an additional "0" must always be prefixed. Example: 0 079 123 45 67.

For a redirection to the voice mail system, the number 39990 must be used.