The TM0310 can be enhanced with a variety of optional expansion cards.

The TM0300 has one expansion slot, which can contain any of these cards:

• Additional 4 port 10/100 Auto MDI/MDIX full duplex ethernet (RJ-45)
  
• High-power 802.11b wireless radio with AP and WDS capability
  
• 802.11b/g wireless radio with AP and WDS capability
• Single or dual-port T-1 w/onboard CSU/DSU