Adjusting the Volume 
Adjust the ringer volume, speakerphone volume, and headset volume in the following ways: 
•  Ringer volume – adjust volume up or down when the phone is on hook 
•  Speaker volume  - adjust the volume after speakerphone button has been activated 
•  Handset volume – adjust the volume with the handset off hook 
Poly Edge E Expansion Module (if equipped) 
 
You can connect one Poly Edge E Expansion Module (EM) to an Edge E400 Series phone to add additional lines.  Each Edge E EM has 22 line 
keys and three pages of lines to provide 66 additional lines keys that you can use to assign lines, BLF contacts, or speed dials to the 
connected phone.