We still receive quite a few POs on the 2900 series of ISRs from Cisco and even more hits at our website from users looking for information.

We put this comparison matrix together to help with the latter.

This info is also available elsewhere, but we have summarized this chart to show what people usually ask us about.

Of course, if we left anything out that you need, or if you have other questions, our Cisco experts would love to hear from you at 855-932-6627 or cisco@maximummidrange.com


Cisco Comparison Matrix ISRs 2901, 2911, 2921, 2951

Integrated Services RouterCisco 2901Cisco 2911Cisco 2921Cisco 2951
Hardware-Based Cryptography and Acceleration Yes Same Same Same
Cisco Unified SRST Sessions 35 50 100 250
Cisco Unified CCME Sessions 35 50 100 150
WAN 10/100/1000 Ports 2 3 3 3
RJ-45-Based Ports 2 3 3 3
SFP-Based Ports 0 0 1 1
Service Module Slots 0 1 1 2
Double-Wide Service Module Slots 0 0 1 1
EHWIC Slots 4 Same Same Same
Double-Wide EHWIC Slots 2 Same Same Same
ISM Slots 1 Same Same Same
Onboard DSP (PVDM) Slots 2 2 3 3
Memory DDR2 ECC DRAM - Default 512 MB Same Same Same
Memory (DDR2 ECC DRAM) - Maximum 2 GB Same Same Same
Compact Flash (External) - Slot 0 256 MB Same Same Same
Compact Flash (External) - Slot 1 none Same Same Same
Compact Flash (External) - Slot 0 4 GB Same Same Same
Compact Flash (External) - Slot 1 4 GB Same Same Same
USB 2.0 Flash Memory Slots (Type A) 2 Same Same Same
USB Console Port (Type B) 1 Same Same Same
Serial Console Port 1 Same Same Same
Serial Auxiliary Port 1 Same Same Same
Power-Supply Options AC and PoE AC, PoE, and DC AC, PoE, and DC AC, PoE, and DC
RPS Support (External) No Cisco RPS 2300 Cisco RPS 2300 Cisco RPS 2300
Typical Power (No Modules) (Watts) 40 50 60 70
Max Power with AC Power Supply 150 210 320 340
Max Power with PoE Power Supply 175 250 370 405
Max Power with DC-PoE Power Supply N/A 140 N/A N/A



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