The Cisco 3945 Integrated Services Router (ISR) delivers highly secure data, voice, video, and application services to the small office. Key features include:

- Modular Services Performance Engine (SPE) 150, which can be upgraded for even higher performance as next-generation WAN environments evolve
- 3 integrated 10, 100, 1000 Ethernet ports with 2 ports capable of RJ-45 or SFP connectivity
- 4 service module slots
- 4 Enhanced High-Speed WAN Interface Card slots
- 4 onboard digital signal processor (DSP) slots
- 1 Internal Services Module slot
- Dual integrated power supplies
- Fully integrated power distribution to modules supporting 802.3af Power over Ethernet
- Security

Specification

Product
Product id	290902
Brand	Cisco Systems
Partnr	CISCO3945/K9
EAN/UPC code	882658278181
Ethernet LAN features
Ethernet LAN	Y
Wireless LAN features
Wi-Fi	Y
DSL features
DSL connection type	N
Ports & interfaces
Ethernet LAN (RJ-45) ports	4
USB ports quantity	2
DC-in jack	Y
Technical details
Rack mounting	Y
Form factor	3U
Supports ISDN connection	Y
Features
Flash memory	256 MB
Internal memory	1024 MB
Design
Product colour	Black
LED indicators	Y
Power
Input current	3 A
Power supply	540 W
Power over Ethernet (PoE)	Y
Operational conditions
Operating temperature (T-T)	0 - 40 °C
Storage temperature (T-T)	-20 - 70 °C
Operating relative humidity (H-H)	5 - 85 procent
Storage relative humidity (H-H)	5 - 95 procent
Operating altitude	0 - 4000 m
Non-operating altitude	0 - 4750 m
Weight & dimensions
Weight	27200 g
Other features
Connectivity LEDs	Y
Input frequency	50/60 Hz
Input voltage	100 - 240 V
Power supply type	AC
Maximum data transfer rate	1 Gbit/s
Dimensions (WxDxH)	438.15 x 476.25 x 133.35 mm
Connectivity technology	Wired