Yealink T48G-SKYPE FOR BUSINESS EDITION User Manual page 232

User Guide for the T48G Skype for Business phone
Connect the EXP40 and the Skype for Business phone using the supplied connecting sheet
2.
and screws.
If you want to connect two or more expansion modules, connect two expansion modules as
below:
Connecting two expansion modules on a single phone is shown as below:
Connect the Ext jack of the Skype for Business phone and the Ext in jack of the expansion
3.
module using one supplied cord.
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