Fast & Secure
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 ExchangeIBM 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
Figure 1 shows the front panel of the Cisco 2921 router with ports and LEDs. C2921-CME-SRST/K9 is similar with it.
Note:
| AC OK | Optional RPS adapter(blank panel shown) | ||
| On/Off switch | LEDs area | ||
| AC power connector |
Figure 2 shows the back panel of the Cisco 2921 router. C2921-CME-SRST/K9 is similar with it.
Note:
| Compact flash 0 and 1 (0, right) | 10/100/1000 Ethernet port (GE 0/1 and GE 0/2) | ||
| EHWIC 0,1,2 and 3 (0, far right) | 10/100/1000 Ethernet port GE 0/0 | ||
| USB serial port | Ground | ||
| RJ-45 serial console port | USB 0 and 1 (1, top) | ||
| AUX port | Service module slots | ||
| 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 |
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