Nortel Meridian 1 Manual page 129

Key Expansion Modules
Follow the steps in Procedure 1 to add one (single) or two (double) Key
Expansion Modules to the M2616 or M2216ACD telephones.
Note 1: Have the associated footstand on hand before installing the Key
Expansion Modules.
Note 2: Adding a Key Expansion Module to a telephone requires a
power supply board along with an additional power source (see
Procedure 2 on page 93 for the M2006/M2008; see Procedure 13 on
page 95 for the M2616/M2216ACD).
Procedure 1
Installing and removing Key Expansion Module(s) on the M2616 and
M2216ACD telephones
1 Remove the handset and place the telephone upside down on top of a
level, solid work surface covered with soft material or paper to prevent
damage to movable keys and the telephone face.
2 Disconnect all cords from the telephone.
3 Remove the two screws from the footstand assembly and unsnap the
footstand assembly from the telephone by pressing inward at the back
of the footstand where it meets the base and pulling upward.
Note: If the M2616/M2216ACD is equipped with a Meridian
Programmable Data Adapter (MPDA) or Meridian Communications
Adapter (MCA), it must be removed and installed into the Key
Expansion Module footstand. Use Procedure 1 on page 89.
4 If the telephone is not equipped with a Key Expansion Module(s), go
to step 7. If replacing the Key Expansion Module(s), go to step 5.
Removing the Key Expansion Module(s)
5 Remove the screws from the footstand assembly (where it meets the
Key Expansion Module), and unsnap the footstand assembly from the
Key Expansion Module and telephone by pressing inward at the back
of the footstand where it meets the base and pulling upward.
6 Remove the interface cable from the telephone by pressing down on
the locking tab. If equipped, remove the interface cable from the first
Key Expansion Module (closest to the telephone).
Add-on modules
Telephone and Attendant Console Installation
Page 125 of 144