ZyXEL Communications MSC1000G User Manual page 52

Chapter 1 Getting to Know Your MSC
Multiple Management Logins
The management switch card can support multiple concurrent management sessions.
Remote Firmware Upgrade
You can use FTP or SFTP to perform configuration backup/restore and firmware upgrade from a
remote location.
Security
• Password protection for system management
• VLAN
• RADIUS client
• TACACS+ client
Alarm LED
An ALM (alarm) LED lights when the second power source is not connected, the IES-5000 is
overheated, the voltage readings are outside the tolerance levels a fan fails or another alarm with a
severity level of MAJOR or CRITICAL occurs.
Flow Control
The management switch card uses IEEE 802.3 flow control to manage the sending of traffic so the
sending device does not transmit more than the receiving device can process. This helps prevent
traffic from being dropped and having to be resent.
Quality of Service
The MSC has eight priority queues so you can ensure mission-critical data gets delivered on time.
Multiple PVC and ATM QoS
The IES allows you to use different channels (also called Permanent Virtual Circuits or PVCs) for
different services or subscribers. Define channels on each DSL port for different services or levels of
service and assign each channel a priority. ATM Quality of Service (QoS) allows you to regulate the
average rate and fluctuations of data transmission. This helps eliminate congestion to allow the
transmission of real time data (such as audio and video).
Priority-based PVCs
The system provides Priority-based PVCs (PPVCs) to give different priorities to PVCs that are
members of the same VLAN. Use up to eight priority queues for the member PVCs. The system
maps frames with certain IEEE 802.1p priorities to a PVC with a particular priority queue.
DSCP-to-IEEE 802.1p Priority Mapping
DiffServ is a class of service (CoS) model that marks packets with DiffServ Code Points (DSCP) so
that they receive specific per-hop treatment at DiffServ-compliant network devices along the route.
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Management Switch Card User's Guide