Avaya Communication Manager Administrator's Manual page 590

Phone Reference
8400-series telephones
Figure 93: 8410B telephone
Figure notes
1 Handset
2 Dial pad
NOTE:
The 8405B and 8405B+ look like the 8410B with the exception that the 8405 series do not
have the second column of line appearances.
590
3 10 programmable buttons
Administrator's Guide for Avaya Communication Manager
November 2003