H3C Technologies H3C MSR 30 - Manual (Page 26)

18
MIM/DMIM Cards
MSR 30 routers adopt modular design and support a wide range of optional MIM/DMIM cards that
provide various interfaces, such as synchronous/asynchronous serial interface, Ethernet interface, E1/T1
interface, ISDN BRI/PRI interface, ADSL interface, audio interface, and Layer 2 switching interface.
MIM cards, DMIM cards, mainly differ in the following aspects:
A MIM card occupies one ordinary MIM slot, while a DMIM card occupies two ordinary (horizontal)
MIM slots. You need to remove the slide rails from the router before installing a DMIM card.
ESM
• High-performance network data encryption ESM module (ESM-ANDE)
• Standard network data encryption ESM module (ESM-SNDE)
ESM module supports IPSec and by using hardware encryption expedites IP packet encryption. The use
of hardware encryption/decryption and hashing operation allows the router to encrypt packets with high
performance and reliability.
The encryption card is optional. On a router installed with an encryption card, the main control board
functions to route IP packets and implement encryption-enabled VPN, while the encryption card functions
to encrypt packets.
Table 16 Encryption card attributes
Attribute Description
Protocol IP sec
Hardware encryption algorithm
Key algorithms: DES, 3DES, AES
Authentication algorithms: HMAC-MD5-96, HMAC-SHA-1-96
VPM/VCPM
Voice processing module (VPM) functions to implement the encryption/decryption, EC and CNG of
voices.
Voice co-processing module (VCPM) processes the voice data in combination with VPM.
• Voice co-processing module (RT-VCPM)
• 8-channel voice processing module (RT-VPM8)
• 16-channel voice processing module (RT-VPM16)
• 24-channel voice processing module (RT-VPM24)
• 32-channel voice processing module (RT-VPM32)