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 1: None

Slot 0: 256 MB

Slot 1: None

Slot 0: 256 MB

Slot 1: None

Slot 0: 256 MB

Slot 1: None

Compact Flash (external): Maximum

Slot 0: 4 GB

Slot 1: 4 GB

Slot 0: 4 GB

Slot 1: 4 GB

Slot 0: 4 GB

Slot 1: 4 GB

Slot 0: 4 GB

Slot 1: 4 GB