Services and Slot Density
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Cisco 3945E
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Cisco 3925E
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Cisco 3945
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Cisco 3925
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Embedded hardware-based cryptography acceleration (IPSec + Secure Sockets Layer [SSL])
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Yes
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Yes
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Yes
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Yes
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Cisco Unified Communications Manager Express Sessions**
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450
|
400
|
350
|
250
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Cisco Unified SRST sessions
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1500
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1350
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1200
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730
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Total onboard WAN or LAN 10/100/1000 ports
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4
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4
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3
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3
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RJ-45-based ports
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4
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4
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3
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3
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SFP-based ports
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2
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2
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2
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2
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Service-module slots
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4
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2
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4
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2
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Doublewide service-module slots
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1
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1
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1
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1
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EHWIC slots
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3
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3
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4
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4
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Doublewide EHWIC slots
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1
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1
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2
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2
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ISM slots
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0
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0
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1
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1
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Online insertion and removal (OIR)
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Services modules
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Services modules
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Services modules
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Services modules
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Onboard DSP (PVDM) slots
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3
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3
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4
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4
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Memory DDR2 ECC DRAM: Default
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1 GB
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1 GB
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1 GB
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1 GB
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Memory DDR2 ECC DRAM: Maximum
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2 GB
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2 GB
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2 GB***
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2 GB***
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Compact Flash (external): Default
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Slot 0: 256 MB
Slot 1: None
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Slot 0: 256 MB
Slot 1: None
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Slot 0: 256 MB
Slot 1: None
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Slot 0: 256 MB
Slot 1: None
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Compact Flash (external): Maximum
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Slot 0: 4 GB
Slot 1: 4 GB
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Slot 0: 4 GB
Slot 1: 4 GB
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Slot 0: 4 GB
Slot 1: 4 GB
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Slot 0: 4 GB
Slot 1: 4 GB
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External USB 2.0 slots (Type A)
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2
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2
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2
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2
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USB console port (Type B) (up to 115.2 kbps)
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1
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1
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1
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1
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Serial console port (up to 115.2 kbps)
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1
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1
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1
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1
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Serial auxiliary port (up to 115.2 kbps)
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1
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1
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1
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1
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Power-supply options
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Internal: AC, PoE, and DC*
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Internal: AC, PoE, and DC*
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Internal: AC, PoE, and DC*
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Internal: AC, PoE, and DC*
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Redundant power supply
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Internal: AC, PoE, and DC*
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Internal: AC, PoE, and DC*
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Internal: AC, PoE, and DC*
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Internal: AC, PoE, and DC*
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Power Specifications
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AC input voltage
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100 to 240 VAC autoranging
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100 to 240 VAC autoranging
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100 to 240 VAC autoranging
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100 to 240 VAC autoranging
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AC input frequency
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47 to 63 Hz
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47 to 63 Hz
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47 to 63 Hz
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47 to 63 Hz
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AC input current range, AC power supply (maximum)
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7.1 to 3.0A
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7.1 to 3.0A
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7.1 to 3.0A
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7.1 to 3.0A
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AC input surge current
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<50A
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<50A
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<50A
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<50A
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DC Operating Input Voltage
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24Vdc - 60Vdc
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24Vdc - 60Vdc
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24Vdc - 60Vdc
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24Vdc - 60Vdc
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Max Input Current range, DC power supply (A)
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33.2 - 12.4
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33.2 - 12.4
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33.2 - 12.4
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33.2 - 12.4
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DC Input Surge Current
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<50A
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<50A
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<50A
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<50A
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Typical power (no modules) (watts)
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158
|
150
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105
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100
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Maximum power with AC power supply (watts)
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540
|
420
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540
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420
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Maximum power with PoE power supply (platform only) (watts)
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540
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420
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540
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420
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Maximum endpoint PoE power available from PoE power supply (watts)
|
520
|
520
|
520
|
520
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Max power with DC input (W)
|
574
|
446
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574
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446
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Maximum endpoint PoE power capacity with PoE boost (watts)
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1040
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1040
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1040
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1040
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Dimensions (H x W x D)
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5.25 x 17.25 x 18.75 in.
(133.35 x 438.15 x 476.25 mm)
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5.25 x 17.25 x 18.75 in.
(133.35 x 438.15 x 476.25 mm)
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5.25 x 17.25 x 18.75 in.
(133.35 x 438.15 x 476.25 mm)
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5.25 x 17.25 x 18.75 in.
(133.35 x 438.15 x 476.25 mm)
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Rack height
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3 rack units (3RU)
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3RU
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3 RU
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3RU
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Rack-mount 19in. (48.3 cm) EIA
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Included
|
Included
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Included
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Included
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Rack-mount 23in. (58.4 cm) EIA
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Optional
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Optional
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Optional
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Optional
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Wall-mount
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No
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No
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No
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No
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Weight with AC power supply (no modules)
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39 lb (17.7 kg)
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39 lb (17.7 kg)
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39 lb (17.7 kg)
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39 lb (17.7 kg)
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Weight with PoE power supply (no modules)
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40 lb (18.1 kg)
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40 lb (18.1 kg)
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40 lb (18.1 kg)
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40 lb (18.1 kg)
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Typical weight (with modules)
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60 lb (27.2 kg)
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60 lb (27.2 kg)
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60 lb (27.2 kg)
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60 lb (27.2 kg)
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Airflow
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Back and sides to front
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Back and sides to front
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Back and sides to front
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Back and sides to front
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Optional airflow kit (includes filter)
|
None
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None
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Front to back and sides
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Front to back and sides
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Environmental specifications
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Operating conditions
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Temperature: 5906 ft (1800m) maximum altitude
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32 to 104ºF
(0 to 40ºC)
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32 to 104ºF
(0 to 40ºC)
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32 to 104ºF
(0 to 40ºC)
|
32 to 104ºF
(0 to 40ºC)
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Temperature: 9843 ft (3000m) maximum altitude
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32 to 104ºF
(0 to 40ºC)
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32 to 104ºF
(0 to 40ºC)
|
32 to 104ºF
(0 to 40ºC)
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32 to 104ºF (0 to 40ºC)
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Temperature: 13123 ft (4000m) maximum altitude'
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32 to 86ºF
(0 to 30ºC)
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32 to 86ºF
(0 to 30ºC)
|
32 to 86ºF
(0 to 30ºC)
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32 to 86ºF
(0 to 30ºC)
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Temperature: Short-term per NEBS/5906 ft (1800m) maximum altitude
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23 to 122°F
(-5 to 50°C)
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23 to 122°F
(-5 to 50°C)
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23 to 122°F
(-5 to 50°C)
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23 to 122°F
(-5 to 50°C)
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Altitude
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4,000m (13,000 ft)
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4,000m (13,000 ft)
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4,000m (13,000 ft)
|
4,000m (13,000 ft)
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Relative humidity
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5 to 85%
|
5 to 85%
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5 to 85%
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5 to 85%
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Short-term (per NEBS) humidity
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5% to 90%, not to exceed 0.024 kg water/kg of dry air
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5% to 90%, not to exceed 0.024 kg water/kg of dry air
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5% to 90%, not to exceed 0.024 kg water/kg of dry air
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5% to 90%, not to exceed 0.024 kg water/kg of dry air
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Acoustic: Sound pressure (typical/maximum)
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57.6/77.6
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57.6/77.6
|
57.6/77.6
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57.6/77.6
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Acoustic: Sound power (typical/maximum)
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67.8/84.7
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67.8/84.7
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67.8/84.7
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67.8/84.7
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Nonoperating conditions
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|
|
2
|
|
Temperature
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-40 to 158ºF
(-40 to 70ºC)
|
-40 to 158ºF
(-40 to 70ºC)
|
-40 to 158ºF
(-40 to 70ºC)
|
-40 to 158ºF
(-40 to 70ºC)
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Relative humidity
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5 to 95%
|
5 to 95%
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5 to 95%
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5 to 95%
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Altitude
|
15,584 ft (4750m)
|
15,584 ft (4570m)
|
15,584 ft (4750m)
|
15,584 ft (4570m)
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Regulatory and Compliance
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Safety
|
UL 60950-1
CAN/CSA C22.2 No. 60950-1
EN 60950-1
AS/NZS 60950-1
IEC 60950-1
|
UL 60950-1
CAN/CSA C22.2 No. 60950-1
EN 60950-1
AS/NZS 60950-1
IEC 60950-1
|
UL 60950-1
CAN/CSA C22.2 No. 60950-1
EN 60950-1
AS/NZS 60950-1
IEC 60950-1
|
UL 60950-1
CAN/CSA C22.2 No. 60950-1
EN 60950-1
AS/NZS 60950-1
IEC 60950-1
|
EMC
|
47 CFR, Part 15
ICES-003 Class A
EN55022 Class A
CISPR22 Class A
AS/NZS 3548 Class A
VCCI V-3
CNS 13438
EN 300-386
EN 61000 (Immunity)
EN 55024, CISPR 24
EN50082-1
|
47 CFR, Part 15
ICES-003 Class A
EN55022 Class A
CISPR22 Class A
AS/NZS 3548 Class A
VCCI V-3
CNS 13438
EN 300-386
EN 61000 (Immunity)
EN 55024, CISPR 24
EN50082-1
|
47 CFR, Part 15
ICES-003 Class A
EN55022 Class A
CISPR22 Class A
AS/NZS 3548 Class A
VCCI V-3
CNS 13438
EN 300-386
EN 61000 (Immunity)
EN 55024, CISPR 24
EN50082-1
|
47 CFR, Part 15
ICES-003 Class A
EN55022 Class A
CISPR22 Class A
AS/NZS 3548 Class A
VCCI V-3
CNS 13438
EN 300-386
EN 61000 (Immunity)
EN 55024, CISPR 24
EN50082-1
|
Telecom
|
TIA/EIA/IS-968
CS-03
ANSI T1.101
ITU-T G.823, G.824
IEEE 802.3
RTTE Directive
|
TIA/EIA/IS-968
CS-03
ANSI T1.101
ITU-T G.823, G.824
IEEE 802.3
RTTE Directive
|
TIA/EIA/IS-968
CS-03
ANSI T1.101
ITU-T G.823, G.824
IEEE 802.3
RTTE Directive
|
TIA/EIA/IS-968
CS-03
ANSI T1.101
ITU-T G.823, G.824
IEEE 802.3
RTTE Directive
|