16
C
HAPTER
1: O
VERVIEW
■
Currently, MSR 20 series routers do not support PoE and regard SIC-4FSW-POE
and DSIC-9FSW-POE (if used) as only ordinary Layer 2 switching modules.
ESM Module
■
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.
VPM and VCPM Module
VPM (Voice Processing Module) functions to implement the encryption/decryption,
EC and CNG of voices.
VCPM (Voice Co-Processing Module) 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)
n
VPM/VCPM is only available on MSR 20-40.
Table 11
Encryption card attributes
Attribute Description
Protocol IPsec
Hardware encryption algorithm
Key algorithms: DES, 3DES, AES
Authentication algorithms:
HMAC-MD5-96, HMAC-SHA-1-96
