With the handset in standby, press: MENU followed by [*] [#] 0 6 [#]
The IPEI identifies a DECT/GAP cordless phone, much like the IMEI of a mobile phone: 13 digits, the first 12 being the code itself and the last one a check character. The IPUI is the form used by Siemens and Gigaset handsets: 10 hexadecimal characters, with a different structure that other vendors' PBXs don't accept as a valid IPEI.
When you register a Siemens or Gigaset handset on a PBX or DECT system from another vendor, which asks for the phone's IPEI to pair it. It happens often in business installations, where a Siemens or Gigaset cordless costs far less than a handset from the PBX's own brand.
With the handset in standby, press MENU followed by * # 0 6 #. The code to enter above is the 10-character hexadecimal one shown on the display.
No. The last digit of the IPEI is a check code calculated according to the ETSI EN 300 175-6 standard, and it can be anything from 0 to 10. When it is 10 it is written as an asterisk (*), so the IPEI stays 13 characters long.
It depends on the vendor of the PBX or DECT server: some want the full IPEI including the check code, others only the first 12 digits. If the system rejects the code, try the other form.
The first character of the IPUI is dropped. The next 4 characters (EMC, 16 bits) are converted to decimal and padded to 5 digits, the remaining 5 (PSN, 20 bits) to decimal padded to 7 digits. The check code, a weighted sum modulo 11, is appended at the end. With Details turned on, the tool shows every step.
No. The calculation happens entirely in the browser, and the tool can be installed and used offline too.