User guide
Appendix A, Optional Expansion Modules
114 Aastra – 2736-007
Figure 6 Model M670i Keys
Figure 7 A 6755i with an M670i Expansion Module (Max 1 per phone)
Model M675i
The M675i provides:
An LCD screen for displaying key labels.
3 keys at the bottom left of the unit that represent "Page 1", "Page 2", and "Page 3" of
the LCD display.