The Cisco 2901 belongs to the Cisco 2900 Series with the Cisco 2911, 2921 and 2951, and is ordered as CISCO2901/K9. It is a 1 RU router, 1.75 x 17.25 x 17.3 in., with two onboard 10/100/1000 RJ-45 ports and no SFP port. There are four EHWIC slots, and a double-wide HWIC-D card uses two of them, for up to two such cards. The 2901 has no service module slot. Its single ISM slot takes the SRE 300 module and does not accept AIM modules. A 19-inch rack-mount kit is included, a 23-inch kit is optional, and wall mounting is supported.
The 512 MB of DDR2 ECC DRAM is soldered to the motherboard. An upgrade fills the one remaining memory slot with 512 MB, 1 GB or 2 GB, up to 2 GB in total, and the DRAM part numbers are common to the 2911 and 2921. External compact flash slot 0 holds 256 MB at the start, slot 1 is empty, and each slot goes to 4 GB. Two onboard PVDM slots take PVDM3 voice DSP modules, and PVDM2 modules work through an adapter. The router supports 35 Cisco Unified SRST sessions and 35 Cisco Unified CME sessions. The fan blower assembly is common to the 2901 and the Cisco 1941.
Power comes as AC or PoE only, with PWR-2901-AC and PWR-2901-POE. There is no DC supply and no external RPS connection, and the AC PoE supply can deliver up to 130 W to endpoints. One Cisco IOS Universal image runs on the router with IP Base active at the start, and the SL-29-DATA-K9, SL-29-UC-K9 and SL-29-SEC-K9 licenses switch on the Data, Unified Communications and Security feature sets. Voice, security and SRE 300 bundles are ordered as CISCO2901-V/K9, CISCO2901-SEC/K9, C2901-VSEC/K9 and C2901-VSEC-SRE/K9. Cisco IOS Software release 15.1(4)M is the minimum for the EHWIC-1GE-SFP-CU card, and the 2901 takes four of them. Pages for the Cisco 2811, Cisco 1841, Cisco 1921, Cisco 4321 and Cisco 4431 sit alongside this one, and the full range is on the networking page.
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Cisco 2901 parts we supply
Routers and bundles (9)
- CISCO2901/K9: Cisco 2901, 2 onboard GE, 4 EHWIC slots, 2 DSP slots, 1 ISM slot, 256 MB CF, 512 MB DRAM, IP Base
- CISCO2901-SEC/K9: Cisco 2901 Security bundle with SEC license PAK
- CISCO2901-V/K9: Cisco 2901 Voice bundle with PVDM3-16 and UC license PAK
- C2901-CME-SRST/K9: Cisco 2901 voice bundle with PVDM3-16, FL-CME-SRST-25 and UC license PAK
- C2901-VSEC/K9: Cisco 2901 Voice Security bundle with PVDM3-16, UC and SEC license PAKs
- C2901-VSEC-CUBE/K9: Cisco 2901 VSEC CUBE bundle with PVDM3-16, FL-CUBEE-25, UC and SEC licenses
- C2901-VSEC-SRE/K9: Cisco 2901 SRE bundle with SRE 300, PVDM3-16, UC and SEC license PAKs
- C2901-WAASX-SEC/K9: Cisco 2901 with WAAS Express feature license, IOS Security PAK, 2.5 GB DRAM
- C2901-WAASX/K9: Cisco 2901 with WAAS Express feature license, 2.5 GB DRAM
Voice DSP modules and ISM (7)
- PVDM3-16: 16-channel packet voice DSP module
- PVDM3-32: 32-channel packet voice DSP module
- PVDM3-64: 64-channel packet voice DSP module
- PVDM3-128: 128-channel packet voice DSP module
- PVDM3-192: 192-channel packet voice DSP module
- PVDM3-256: 256-channel packet voice DSP module
- ISM-SRE-300-K9: Services Ready Engine 300 internal service module, 512 MB DRAM, 4 GB flash
Interface cards (1)
- EHWIC-1GE-SFP-CU: 1-port dual-mode SFP or copper Gigabit Ethernet EHWIC
Memory and compact flash (12)
- MEM-2900-512MB-DEF: 512 MB DRAM for the Cisco 2901 to 2921 (default)
- MEM-2900-512U1GB: 512 MB to 1 GB DRAM upgrade
- MEM-2900-512U1.5GB: 512 MB to 1.5 GB DRAM upgrade
- MEM-2900-512U2.5GB: 512 MB to 2.5 GB DRAM upgrade
- MEM-2900-512MB=: 512 MB DRAM spare
- MEM-2900-1GB=: 1 GB DRAM spare
- MEM-2900-2GB=: 2 GB DRAM spare
- MEM-CF-256MB: 256 MB compact flash for the Cisco 1900, 2900 and 3900 ISR (default)
- MEM-CF-256U512MB: 256 MB to 512 MB compact flash upgrade
- MEM-CF-256U1GB: 256 MB to 1 GB compact flash upgrade
- MEM-CF-256U2GB: 256 MB to 2 GB compact flash upgrade
- MEM-CF-256U4GB: 256 MB to 4 GB compact flash upgrade
Power, cooling and mounting (6)
- PWR-2901-AC: Cisco 2901 AC power supply
- PWR-2901-POE: Cisco 2901 AC power supply with Power over Ethernet
- 1941-2901-FANBLWR=: Fan blower assembly for the Cisco 1941 and 2901 (spare)
- ACS-2901-RM-19(=): 19-inch rack-mount kit for the Cisco 2901
- ACS-2901-RM-23=: 23-inch rack-mount kit for the Cisco 2901 (spare)
- FIPS-SHIELD-2901=: FIPS opacity shield for the Cisco 2901
Software licenses (4)
- SL-29-DATA-K9: Data license for the Cisco 2901 and 2951
- SL-29-UC-K9: Unified Communications license for the Cisco 2901 and 2951
- SL-29-SEC-K9: Security license for the Cisco 2901 and 2951
- SL-29-SECNPE-K9: Security No Payload Encryption license for the Cisco 2901 and 2951