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C2921-CME-SRST/K9 Overview
C2921-CME-SRST/K9 is a Cisco 2921 router bundled with Voice Bundle w/PVDM3-16, FL-CME-SRST-25, UC License PAK.
When Unified CME is used in SRST mode, it provides more call processing features for the IP phones than those are available with the SRST feature on a router. In addition, to the SRST features such as call preservation, auto-provisioning, and failover, Unified CME in SRST mode also provides most of the Unified CME telephony features for the SCCP phones, including:
Paging
Conferencing
Hunt groups
Basic automatic call distribution (B-ACD)
Call park, call pickup, call pickup groups
Overlay-DN, softkey templates
Cisco IP Communicator
Cisco Unified Video Advantage
Integration with Cisco Unity with MWI support at remote sites, with distributed Microsoft Exchange or IBM Lotus Domino server
Quick Specs
Table 1 shows the Quick Specs of the C2921-CME-SRST/K9.
| Product Code | C2921-CME-SRST/K9 |
| Bundle | 2921 Voice Bundle w/ PVDM3-32,FL-CME-SRST-25, UC License PAK |
| Rack Units | 2U |
| Interfaces | 3 integrated 10/100/1000 Ethernet ports (RJ-45 only) |
| Expansion Slot(s) | 2 service module slot
1 Internal Service Module slot 3 onboard digital signal processor slots 4 Enhanced high-speed WAN interface card (EHWIC) slots |
| RAM | 512 MB (installed) / 2 GB (max) |
| Flash Memory | 256 MB (installed) / 8 GB (max) |
| Dimensions | 47 cm x 43.8 cm x 8.9 cm |
Product Details
Note:
| ① | AC OK | ④ | Optional RPS adapter(blank panel shown) |
| ② | On/Off switch | ⑤ | LEDs area |
| ③ | AC power connector |
Note:
| ① | Compact flash 0 and 1 (0, right) | ⑦ | 10/100/1000 Ethernet port (GE 0/1 and GE 0/2) |
| ② | EHWIC 0,1,2 and 3 (0, far right) | ⑧ | 10/100/1000 Ethernet port GE 0/0 |
| ③ | USB serial port | ⑨ | Ground |
| ④ | RJ-45 serial console port | ⑩ | USB 0 and 1 (1, top) |
| ⑤ | AUX port | Service module slots | |
| ⑥ | SFP |
Modularity Features
Table 3 shows some recommended modules for this router.
| Models | Description |
| HWIC-2T | 2-Port Serial WAN Interface Card Cisco Router High-Speed WAN Interface card |
| EHWIC-1GE-SFP-CU | Cisco 1900, 2900, 3900 Router EHWIC WAN Card vb EHWIC-1GE-SFP-CU |
| EHWIC-4ESG | Four port 10/100/1000 Base-TX Gigabit Ethernet switch interface card for Cisco 1900 2900 3900 Routers |
| ISM-SRE-300-K9 | Internal Services Module (ISM) with Services Ready Engine |
| MEM-CF-256U1GB | 256MB to 1GB Compact Flash Upgrade for Cisco 1900,2900,3900 |
| MEM-CF-256U2GB | 256MB to 2GB Compact Flash Upgrade for Cisco 1900,2900,3900 |
| MEM-CF-256U512MB | 256MB to 512MB CF Upgrade for Cisco 1900,2900,3900 ISR |
| MEM-CF-256U4GB | 256MB to 4GB Compact Flash Upgrade for Cisco 1900,2900,3900 |
| MEMUSB-1024FT | 1GB USB Flash Token |
Compare to Similar Routers
Table 4 shows the comparison between CISCO2921/K9 and C2921-CME-SRST/K9.
| Model | CISCO2921/K9 | C2921-CME-SRST/K9 |
| Bundle | N/A | 2921 Voice Bundle w/ PVDM3-32,FL-CME-SRST-25, UC License PAK |
| Interface | 3GE | 3GE |
| EHWIC slot | 4 | 4 |
| SIM Slot | 1 | 1 |
| SFP | 1 | 1 |
| Memory | 512MB (installed) / 2 GB (max) | 512MB (installed) / 2 GB (max) |
| Flash Memory | 256MB (installed) / 8 GB (max) | 256MB (installed) / 8 GB (max) |
| Rack Unit | 2U | 2U |
Get more information
C2921-CME-SRST/K9 Specification
C2921-CME-SRST/K9 Specifications |
|
| Manufacturer | Cisco Systems, Inc |
| Manufacturer Part Number | C2921-CME-SRST/K9 |
| Product Type | Router |
| Bundle | 2921 Voice Bundle w/ PVDM3-32,FL-CME-SRST-25, UC License PAK |
| Form Factor | External – modular – 2U |
| Dimensions (W x D x H) | 47 cm x 43.8 cm x 8.9 cm |
| Weight | 13.2 kg |
| DRAM Memory | 512 MB (installed) / 2 GB (max) |
| Flash Memory | 256 MB (installed) / 8 GB (max) |
| Routing Protocol | OSPF, IS-IS, BGP, EIGRP, DVMRP, PIM-SM, IGMPv3, GRE, PIM-SSM, static IPv4 routing, static IPv6 routing |
| Data Link Protocol | Ethernet, Fast Ethernet, Gigabit Ethernet |
| Network / Transport Protocol | IPSec |
| Remote Management Protocol | SNMP, RMON |
| Digital Ports Qty | 32 |
| Features | MPLS support, Syslog support, IPv6 support, Class-Based Weighted Fair Queuing (CBWFQ), Weighted Random Early Detection (WRED) |
| Compliant Standards | IEEE 802.1ah, IEEE 802.1ag |
| Power | AC 120/230 V ( 50/60 Hz ) |
