Accepted Solutions
There is a Smart Design: Implementation Guide at :http://www.cisco.com/web/partners/sell/smb/tools_and_resources/smart_business_comm_system.html
Implementation Guide
Smart Business Communications System 2.0 – Implementation Guide 
The implementation guide complements the SBCS 2.0 Design Guide through the detailed guidance for SBCS 2.0 based Main Office deployment. This document leverages the GUI configuration capability with easy-to-follow step-by-step network deployment guidance using CCA v2.2. It also includes an installation checklist to assist during the installation process. It is recommended that users refer to the SBCS 2.0 Design Guide for underlying design guidance and considerations.
In this (figure 6) it shows a 48 and a 24 port switch connecting to each of the UC560 expansion ports (there are 2 GE ports for expansion on the 560).
These could also be 2 48 port switches (96 total ports). (In your scenario, I would connect 2 this way and the third to one of those 2.)
There is a Smart Design: Implementation Guide at :http://www.cisco.com/web/partners/sell/smb/tools_and_resources/smart_business_comm_system.html
Implementation Guide
Smart Business Communications System 2.0 – Implementation Guide
The implementation guide complements the SBCS 2.0 Design Guide through the detailed guidance for SBCS 2.0 based Main Office deployment. This document leverages the GUI configuration capability with easy-to-follow step-by-step network deployment guidance using CCA v2.2. It also includes an installation checklist to assist during the installation process. It is recommended that users refer to the SBCS 2.0 Design Guide for underlying design guidance and considerations.
In this (figure 6) it shows a 48 and a 24 port switch connecting to each of the UC560 expansion ports (there are 2 GE ports for expansion on the 560).
These could also be 2 48 port switches (96 total ports). (In your scenario, I would connect 2 this way and the third to one of those 2.)
