MTBF for Catalyst 4507r

[ciscomv79]

Hi, I am trying to find MTBF for this modular switch but I can not find it on any datasheet from this model, please instruct me how to find it? I need it to demonstrate a customer the advantages of Cisco over 3com, since so far I have found 3com?s 7750 switch has a much better backplane , port density and switching capacity! Its MTBF is 405000h !

Thanks for your help.

[aghaznavi]

The line cards acquire the features and capabilities of the installed supervisor engine. This architecture enables customers to easily upgrade all Ethernet line cards on their Cisco Catalyst 4500 Series systems to higher-layer switching functions by adding a new supervisor engine. The simple design of the line cards results in a very high mean time between failures (MTBF), helping ensure high availability for a single connection to an end user