1-14
threshold, the fans are rotating only at half of the speed (50%). When a fan stops rotating, the fan
controller alarms. The alarm and state LEDs of the FAN are located on the front panel of MPUF.
Appearance
The following figure shows a FAN module, taking MSR 50-60 for example.
Figure 1-13
FAN module (the MSR 50-60)
SIC/DSIC and FIC/DFIC Interface Cards
MSR 50 series routers adopt modular design and support a wide range of optional SIC/DSIC and
FIC/DFIC interface cards, providing various interfaces, such as synchronous/asynchronous serial
interface, Ethernet interface, E1/T1, ISDN BRI/PRI, ADSL, audio interface, Layer 2 switching interface,
and so on.
For details about the interface cards, refer to
MSR Series Routers Interface Card and Interface Module
Manual
.
For an MSR 50 series router, 4FSW/1FEA/1GEC/1ADSL/1ADSL-I can only be installed in Slot 2 or Slot
4.
ESM Module
z
High-performance network data encryption ESM module (ESM-ANDE)
z
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.
