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The Cisco 3900 Series builds on the best-in-class offering of the existing Cisco 3800 Series Integrated Services Routers by now offering four platforms: the Cisco 3945E, Cisco 3925E, Cisco 3945, and Cisco 3925 Integrated Services Routers. The Cisco 3900 Series offers embedded hardware encryption acceleration, voice- and video-capable DSP slots, optional firewall, intrusion prevention, call processing, voicemail, and application services. In addition, the platforms support the industry's widest range of wired and wireless connectivity options such as T1/E1, T3/E3, xDSL, copper, and fiber Gigabit Ethernet. The Cisco 3900 Series offers superior performance and flexibility for flexible network deployments from small business offices to large enterprise offices-all while providing industry-leading investment protection.
| CISCO3945E/K9 | Cisco 3945E w/SPE250,4GE,3EHWIC,3DSP,4SM,256MBCF,1GBDRAM,IPB | $19,500.00 |
| CISCO3925E/K9 | Cisco 3925E w/SPE200,4GE,3EHWIC,3DSP,2SM,256MBCF,1GBDRAM,IPB | $16,500.00 |
| CISCO3945/K9 | Cisco 3945 w/SPE150 (3GE,4EHWIC,4DSP,4SM,256MBCF,1GBDRAM,IPB) | $14,945.00 |
| CISCO3925/K9 | Cisco 3925 w/SPE100 (3GE,4EHWIC,4DSP,2SM,256MBCF,1GBDRAM,IPB) | $10,925.00 |
| Services and Slot Density | Cisco 3945E | Cisco 3925E | Cisco 3945 | Cisco 3925 |
| Embedded hardware-based cryptography acceleration (IPSec + Secure Sockets Layer [SSL]) | Yes | Yes | Yes | Yes |
| Cisco Unified Communications Manager Express Sessions** | 450 | 400 | 350 | 250 |
| Cisco Unified SRST sessions | 1500 | 1350 | 1200 | 730 |
| Total onboard WAN or LAN 10/100/1000 ports | 4 | 4 | 3 | 3 |
| RJ-45-based ports | 4 | 4 | 3 | 3 |
| SFP-based ports | 2 | 2 | 2 | 2 |
| Service-module slots | 4 | 2 | 4 | 2 |
| Doublewide service-module slots | 1 | 1 | 1 | 1 |
| EHWIC slots | 3 | 3 | 4 | 4 |
| Doublewide EHWIC slots | 1 | 1 | 2 | 2 |
| ISM slots | 0 | 0 | 1 | 1 |
| Online insertion and removal (OIR) | Services modules | Services modules | Services modules | Services modules |
| Onboard DSP (PVDM) slots | 3 | 3 | 4 | 4 |
| Memory DDR2 ECC DRAM: Default | 1 GB | 1 GB | 1 GB | 1 GB |
| Memory DDR2 ECC DRAM: Maximum | 2 GB | 2 GB | 2 GB*** | 2 GB*** |
| Compact Flash (external): Default | Slot 0: 256 MB | Slot 0: 256 MB | Slot 0: 256 MB | Slot 0: 256 MB |
| Slot 1: None | Slot 1: None | Slot 1: None | Slot 1: None | |
| Compact Flash (external): Maximum | Slot 0: 4 GB | Slot 0: 4 GB | Slot 0: 4 GB | Slot 0: 4 GB |
| Slot 1: 4 GB | Slot 1: 4 GB | Slot 1: 4 GB | Slot 1: 4 GB | |
| External USB 2.0 slots (Type A) | 2 | 2 | 2 | 2 |
| USB console port (Type B) (up to 115.2 kbps) | 1 | 1 | 1 | 1 |
| Serial console port (up to 115.2 kbps) | 1 | 1 | 1 | 1 |
| Serial auxiliary port (up to 115.2 kbps) | 1 | 1 | 1 | 1 |
| Power-supply options | Internal: AC, PoE, and DC* | Internal: AC, PoE, and DC* | Internal: AC, PoE, and DC* | Internal: AC, PoE, and DC* |
| Redundant power supply | Internal: AC, PoE, and DC* | Internal: AC, PoE, and DC* | Internal: AC, PoE, and DC* | Internal: AC, PoE, and DC* |
| Dimensions (H x W x D) | 5.25 x 17.25 x 18.75 in. | 5.25 x 17.25 x 18.75 in. | 5.25 x 17.25 x 18.75 in. | 5.25 x 17.25 x 18.75 in. |
| (133.35 x 438.15 x 476.25 mm) | (133.35 x 438.15 x 476.25 mm) | (133.35 x 438.15 x 476.25 mm) | (133.35 x 438.15 x 476.25 mm) | |
| Rack height | 3 rack units (3RU) | 3RU | 3 RU | 3RU |
| Weight with AC power supply (no modules) | 39 lb (17.7 kg) | 39 lb (17.7 kg) | 39 lb (17.7 kg) | 39 lb (17.7 kg) |
| Weight with PoE power supply (no modules) | 40 lb (18.1 kg) | 40 lb (18.1 kg) | 40 lb (18.1 kg) | 40 lb (18.1 kg) |
| Typical weight (with modules) | 60 lb (27.2 kg) | 60 lb (27.2 kg) | 60 lb (27.2 kg) | 60 lb (27.2 kg) |
| Airflow | Back and sides to front | Back and sides to front | Back and sides to front | Back and sides to front |
