Cisco 2600 Series Routers

• Cisco IOS Release 12.1
  Cross-Platform Release Notes and Caveats

• Feature Pack Release Notes

• Cisco 2600 Series - Cisco IOS Release 12.1 T

• Cisco 2600 Series - Cisco IOS Release 12.1 XH

• Cisco 2600 Series - Cisco IOS Release 12.1 XI

• Cisco 2600 Series - Cisco IOS Release 12.1 XM

• Cisco 2600 Series - Cisco IOS Release 12.1 XQ

• Cisco 2600 Series - Cisco IOS Release 12.1 YB

• Cisco 2600 Series - Cisco IOS Release 12.1 YD

• Cisco Signaling Link Terminal - Cisco IOS Release 12.1 T

• Caveats
  Caveats documentation for Cisco IOS Releases 12.1 and 12.1 T (includes open and resolved severity 1 and 2 caveats and select severity 3 caveats for all platforms)