ISR Router Model Numbers!
Roguetadhg
Member Posts: 2,489 ■■■■■■■■□□
I had a heck of a time looking for this information so here we go all you Security Geeks - ISR (Integrated Service Routers). 
ISR Models:
17XX: 11, 12, 21, 51, 60
1841
28XX: 01, 11, 21, 51
26XXxm: 11, 21, 51
2691
37XX: 25, 45
38XX: 25, 45
Source: http://www.cisco.com/web/partners/downloads/765/tools/quickreference/isr.pdf
ISR Models:
17XX: 11, 12, 21, 51, 60
1841
28XX: 01, 11, 21, 51
26XXxm: 11, 21, 51
2691
37XX: 25, 45
38XX: 25, 45
Source: http://www.cisco.com/web/partners/downloads/765/tools/quickreference/isr.pdf
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Comments
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azaghul
Member Posts: 569 ■■■■□□□□□□
I think the 17xx, 26xx and 37xx series are Multi Service Routers.
Though what the exact difference is between an MSR and an ISR (in real functional terms) would probably only ever be able to be found in the cryptic language of "Marketing Speak".:D