Device Type: Modular Integrated Services Router (ISR G2)
Model / SKU: Cisco 2901 (CISCO2901/K9, C1-CISCO2901/K9)
Form Factor: 1 RU rack-mount (17.2 × 17.3 × 1.8 in); approx. 6.1 kg
Onboard WAN Ports: 2x 10/100/1000 Gigabit Ethernet (RJ-45)
Expansion Slots: 4x EHWIC slots (2 double-wide), 1x ISM slot, 2x PVDM DSP slots
Default Memory: 512 MB DDR2 ECC DRAM / 256 MB Compact Flash
Max Memory: 2 GB DRAM / 4 GB Flash (per slot)
Voice/Unified Communications: Supports Cisco Unified SRST and CCME for up to 35 sessions
Security: Embedded hardware encryption acceleration (IPSec + SSL) onboard
Power Supply: Internal AC (100–240V); optional PoE power supply variant (PWR-2901-POE)
Operating Temperature: 0°C to 40°C (32°F to 104°F)
Key Specs: Cisco 2901 Modular ISR, 2x Gigabit Ethernet, 4x EHWIC + 1x ISM + 2x PVDM Slots, 512MB DRAM / 256MB Flash (Default), Hardware Encryption (IPSec/SSL), Supports SRST/CCME (35 Sessions), Internal AC PSU, 1RU Rackmount
Usage: Secure data, voice, and video routing for small-to-medium branch offices; supports concurrent services (firewall, VPN, IPS) and optional integrated voice gateway/call processing via PVDM DSP modules and EHWIC voice cards.
