Series Features Overview
Features Details
Cisco SRST Up to 96 phones
Voice Mail and Automated Attendant Up to 250 mailboxes with up to 16 concurrent sessions using Cisco
Unity™ Express Network Module
Voice Interfaces FXS, FXO, Direct Inward Dial (DID), E&M, Centralized Automated
Message Accounting (CAMA), Cisco Unity Express (CUE), Basic Rate
Interface (BRI), T1, E1 Primary Rate Interface (PRI), QSIG, channel
associated signaling (CAS)
Network Example
When To Deploy

Platform Overview

Cisco 2800 Series
Models NME EVM AIM HWIC PVDM*
Fixed LAN
Ports
DRAM (MB)
Default Max
Compact
Flash (MB)
Default Max
Power
Supply
Cisco 2801 0*** 0 2 2** 2 2 FE 128 384 64 128 AC,
AC-IP
Cisco 2811 1 0 2 4 2 2 FE 256 768 64 256 AC,
AC-IP,
DC
Cisco 2821 1 NME or
NME-X
1 2 4 3 2 GE 256 1024 64 256 AC,
AC-IP,
DC
Cisco 2851 1 NME,
NMD,
NME-X, or
NME-XD
1 2 4 3 2 GE 256 1024 64 256 AC,
AC-IP,
DC
Series Specications
* Number of PVDM slots on the motherboard, additional DSP resources can be added using a network
module
** Four interface card slots total are supported on the Cisco 2801 router; two slots support HWIC, WIC, VIC, or
VWIC modules; one slot supports WIC, VIC, or VWIC modules; one slot supports VIC or VWIC modules (in voice
mode only)
*** Cisco 2801 router does not support network modules
Cisco 2800 Series
40
Deploy the Cisco 2800 Series when you need:
• Performance and densities for concurrent data,
security, voice, and advanced services up to
multiple T1/E1/xDSL connections
• VPN connections, or plan to migrate to them
over time
• Integrated security services as part of the
Cisco Self Defending Network, which enable
network device protection, threat defense,
secure connectivity, and endpoint protection
and control
• Ability to upgrade the internal power supply to
support integrated 10/100 switching with PoE
support for up to 64 ports with inline power
• High-availability features such as an integrated
Redundant Power Supply (RPS) connector for
quick connections to an external redundant
power supply, Error Correction Code (ECC)
Double Data Rate (DDR) SDRAM memory to
detect and correct SDRAM errors without user
intervention, and Cisco IOS Software warm
reboot support for reduced downtime caused
by system reboots (Note: Cisco 2801 does not
support ECC DDR DRAM)
• Secure integrated call processing, voice mail
and automated attendant, exible telephony
interfaces, redundancy for centralized call
processing, or robust DSP support, including
local conferencing and transcoding
• Advanced management for security, routing,
quality of service (QoS), and switching services
with Cisco SDM Version 20

IP

PSTN
WAN
Internet
Local Phone and
PBX Connections Fully Integrated
Security Services
Support for Local
Legacy Systems
Integrated IPsec,
Firewall, IPS,
IP Communications,
QoS, and Content
Networking
Comprehensive
IP Connectivity
and Services
Broad Range of Connectivity Options
to Corporate WAN, Internet, and PSTN
for Primary and Backup Data
41
Dimensions (H x W x D)
Cisco 2801
Cisco 2811
Cisco 2821, Cisco 2851
172 x 175 x 165 in (437 x 445 x 419 mm); 1-rack-unit (RU) height
175 x 1725 x 164 in (445 x 4382 x 4166 mm); 1-RU height
35 x 1725 x 164 in (889 x 4382 x 4166 mm) 2-RU height
Console Port 1 (up to 1152 Kbps)
Auxiliary Port 1 (up to 1152 Kbps)
USB Port
Cisco 2801
Cisco 2811, Cisco 2821, and
Cisco 2851
1
2
Integrated Channel Service Unit/
Data Service Unit (CSU/DSU)
Yes, with optional T1/E1, Fractional T1/E1, 56k/64k support
Voice/Data Support Yes, for voice through VIC, VWIC, NM, and EVM
Compression Software and hardware, with optional AIM support
Encryption Hardware support on motherboard; optional AIM for enhanced
performance