Polycom phones sort directory listings Alphabetically using the Name field in the extension programming. The names are sorted alphabetically exactly as they are keyed into the Extension Name Field. Polycom will hold the first 99 entries in the directory.
Cisco and Yealink phones sort by extension.
If the handset is the only device which can be used for search, the most effective method is by using the spoken dial by name company directory which works the same for all handsets. The listings in this directory are managed by the Hide Extension from Company Directory setting in Extension Programming.
The Hide Extension From Company Directory setting in Extension programming applies to the spoken dial by name directory and the Print Company Directory in the portal. It does not apply to the directory listing on the handsets.