This Flash Memory Upgrade applies to any 2600XM series Router, which includes: 2610XM, 2611XM, 2620XM, 2621XM, 2650XM, and 2651XM.
Having 48 Mb. in Flash allows you to load 12.4T IOS Images (12.4.15.T14)! IOS 12.4T includes some important features not found in Main Line IOS 12.4, such as Zone-Based Firewalls! (very important for the new CCIE 4.0 Exam)
In addition, with 48 in Flash, you can also load some other applications such as SDM (Security Device Manager) and/or CME (Call Express Manager). CME is an essential part of the CCNP (ONT Exam) and CCVP Certifications!
