Avaya Communication Manager Administrator's Manual page 688

Telephone Reference
Figure 272: 8410B telephone
Figure notes:
1. Handset
2. Dial pad
Note:
The 8405B and 8405B+ look like the 8410B with the exception that the 8405
Note:
series do not have the second column of line appearances.
688 Administrator Guide for Avaya Communication Manager
3. 10 programmable buttons