Siemens Hipath 3800 Programming Manual [upd] -

Siemens discontinued active mainstream support for the HiPath 3800 in some regions, though third-party maintenance remains strong. The official programming manual is now a legacy document. If you are migrating to a modern Unify OpenScape Voice system, the manual is still essential for extracting configuration data (e.g., exporting your numbering plan).

Using the manual's "Key Programming" section, you send a configuration to the phone: Key 1 = Line, Key 2 = Speed Dial (Home), Key 3 = Do Not Disturb. siemens hipath 3800 programming manual