The grounding and lightning protection cabling setup for MP-124 Rev. D  depends on 
whether AudioCodes orderable FXS Patch Panel (see Section  5.1.1.1) or a third-party MDF 
(see Section  5.1.1.2) is used. 
5.1.1.1  Power Surge Protection and Grounding Connected to MDF through 
AudioCodes FXS Patch Panel 
Figure  5-1: MP-124 Rev. D Surge Protection and Grounding using AudioCodes FXS Patch Panel