
Model Number: |
CISCO2921/K9 Cisco 2921 Router ISR G2 |
Detail: |
Cisco 2921 Router w/3 GE,4 EHWIC,3 DSP,1 SM,256MB CF,512MB DRAM,IPB |
CISCO2921/K9 Overview
The Cisco 2921 router, supporting voice module, is designed for small offices.


*Specification*
Cisco Series | Cisco 2901 | Cisco 2911 | Cisco 2921 | Cisco 2951 |
Services and Slot Density | ||||
Embedded Hardware-Based Cryptography and Acceleration | Yes | Yes | Yes | Yes |
Cisco Unified SRST Sessions | 35 | 50 | 100 | 250 |
Cisco Unified CCME Sessions | 35 | 50 | 100 | 250 |
Total Onboard WAN 10/100/1000 Ports | 2 | 3 | 3 | 3 |
RJ-45-Based Ports | 2 | 3 | 3 | 3 |
SFP-Based Ports (use of SFP port disables the corresponding RJ-45 port) | 0 | 0 | 1 | 1 |
Service Module Slots | 0 | 1 | 1 | 2 |
Double-Wide Service Module Slots (use of a double-wide slot will occupy all single-wide service module slots in a 2900) | 0 | 0 | 1 | 1 |
EHWIC Slots | 4 | 4 | 4 | 4 |
Double-Wide Service Module Slots (use of a double-wide slot will occupy all single-wide service module slots in a 2900) | 2 | 2 | 2 | 2 |
ISM Slots | 1 | 1 | 1 | 1 |
Onboard DSP (PVDM) Slots | 2 | 2 | 3 | 3 |
Memory DDR2 ECC DRAM – Default | 512 MB | 512 MB | 512 MB | 512 MB |
Memory (DDR2 ECC DRAM) – Maximum | 2 GB | 2 GB | 2 GB | 2 GB |
Compact Flash (External) – Default | slot 0: 256 MB slot 1: none | slot 0: 256 MB slot 1: none | slot 0: 256 MB slot 1: none | slot 0: 256 MB slot 1: none |
Compact Flash (External) – Maximum | slot 0: 4 GB slot 1: 4 GB | slot 0: 4 GB slot 1: 4 GB | slot 0: 4 GB slot 1: 4 GB | slot 0: 4 GB slot 1: 4 GB |
External USB 2.0 Flash Memory Slots (Type A) | 2 | 2 | 2 | 2 |
USB Console Port (Type B) (up to 115.2 kbps) | 1 | 1 | 1 | 1 |
Serial Console Port | 1 | 1 | 1 | 1 |
Serial Auxiliary Port | 1 | 1 | 1 | 1 |
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 |
Power Specifications | ||||
AC Input Voltage | 100 to 240 VAC auto ranging | 100 to 240 VAC auto ranging | 100 to 240 VAC auto ranging | 100 to 240 VAC auto ranging |