The Cisco 2911 is one of four Cisco 2900 Series routers, alongside the 2901, 2921 and 2951. It has three onboard 10/100/1000 RJ-45 ports and no SFP port. For modules it offers four EHWIC slots, of which two can be double-wide, one service module slot, one internal ISM slot and two onboard PVDM slots for voice DSP modules. The chassis is 12 inches deep, with NEBS options that include an optional fan filter and an airflow assembly that gives front-to-back cooling in 23-inch racks.
The 2911 ships with 512 MB of DDR2 DRAM soldered to the board and goes to 2 GB, with upgrades filling the second memory slot in 512 MB, 1 GB and 2 GB sizes. Those DRAM numbers are shared with the 2901 and 2921, but the 2951 uses different ones. Two external compact flash slots start with 256 MB in slot 0 and go to 4 GB each. PVDM3 modules fit the DSP slots natively, and older PVDM2 modules work through an adapter. The service module slot takes SRE 700, 710, 900 and 910 modules, the ISM slot takes the SRE 300, and the router holds two SRE modules at most. The 2911 also supports the Cisco Enhanced EtherSwitch service modules, which add Layer 2 or Layer 3 switching.
Power comes as AC, PoE, DC or DC-PoE. Redundancy and PoE boost use the Cisco RPS 2300 through an RPS adapter, RPS-ADPTR-2911. One Cisco IOS Universal image runs on the router, IP Base is active at the start, and the Data, Unified Communications and Security (SEC or SEC-NPE) licenses are added by activation. The 2911 supports 50 Cisco Unified SRST sessions and 50 Cisco Unified CME sessions. EHWIC-1GE-SFP-CU needs Cisco IOS Software release 15.1(4)M, and up to four of them fit. The Cisco 1841, Cisco 1921 and Cisco 1941 have pages of their own, and the rest of the range is under networking.
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Cisco 2911 parts we supply
Routers and bundles (2)
- CISCO2911/K9: Cisco 2911, 3 onboard GE, 4 EHWIC slots, 2 DSP slots, 1 ISM slot, 256 MB CF, 512 MB DRAM, IP Base
- CISCO2911-V/K9: Cisco 2911 voice bundle, PVDM3-16, UC license PAK
Voice DSP modules (6)
- PVDM3-16: 16-channel high-density packet voice DSP module
- PVDM3-64: 64-channel high-density packet voice DSP module
- PVDM3-32: 32-channel high-density packet voice DSP module
- PVDM3-128: 128-channel high-density packet voice DSP module
- PVDM3-192: 192-channel high-density packet voice DSP module
- PVDM3-256: 256-channel high-density packet voice DSP module
Service modules (5)
- SM-SRE-710-K9: Services Ready Engine 710 service module
- SM-SRE-910-K9: Services Ready Engine 910 service module
- SM-SRE-700-K9: Services Ready Engine 700 service module
- SM-SRE-900-K9: Services Ready Engine 900 service module
- ISM-SRE-300-K9: Services Ready Engine 300 internal service module
Interface cards (1)
- EHWIC-1GE-SFP-CU: 1-port dual-mode SFP or copper Gigabit Ethernet EHWIC
Memory and compact flash (11)
- MEM-2900-512U1GB: 512 MB to 1 GB DRAM upgrade, Cisco 2901 to 2921
- MEM-2900-512U1.5GB: 512 MB to 1.5 GB DRAM upgrade, Cisco 2901 to 2921
- MEM-2900-512U2.5GB: 512 MB to 2.5 GB DRAM upgrade, Cisco 2901 to 2921
- MEM-2900-512MB=: 512 MB DRAM, Cisco 2901, 2911 and 2921 (spare)
- MEM-2900-1GB=: 1 GB DRAM, Cisco 2901, 2911 and 2921 (spare)
- MEM-2900-2GB=: 2 GB DRAM, Cisco 2901, 2911 and 2921 (spare)
- MEM-CF-256MB: 256 MB compact flash, 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 and redundancy (6)
- PWR-2911-AC: Cisco 2911 AC power supply
- PWR-2911-POE: Cisco 2911 AC power supply with Power over Ethernet
- PWR-2911-DC: Cisco 2911 DC power supply
- PWR-RPS2300: Cisco Redundant Power System 2300
- RPS-ADPTR-2911: Cisco 2911 RPS adapter for use with an external RPS
- RPS-COVER-2911=: Cover for the empty RPS adapter slot, Cisco 2911 (spare)
Cooling (3)
- 2911-FANASSY=: Cisco 2911 fan assembly, no bezel (spare)
- 2911-FANFLTR-NEBS: Cisco 2911 fan filter for NEBS environments
- 2911-AIRCVTR-NEBS=: Cisco 2911 front-to-back air flow converter for NEBS use (spare)
Software licenses (4)
- SL-29-DATA-K9: Data license for the Cisco 2901 to 2951
- SL-29-UC-K9: Unified Communications license for the Cisco 2901 to 2951
- SL-29-SEC-K9: Security license for the Cisco 2901 to 2951
- SL-29-SECNPE-K9: Security No Payload Encryption license for the Cisco 2901 to 2951