
Chapter 1 Introducing the IES-1248-51V
IES-1248-51V User’s Guide
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System Monitoring
• System status (link status, rates, statistics counters)
• Temperatures, voltage reports and alarms.
System Error Logging
The IES-1248-51V’s system error log will record error logs locally. These logs may
be viewed again after a warm restart.
Alarm LED
An ALM (alarm) LED lights when the IES-1248-51V is overheated, the fans are
not working properly, the voltage readings are outside the tolerance levels or an
alarm has been detected on the ALARM input pins.
Bandwidth Control
The IES-1248-51V supports rate limiting in 32 Kbps increments allowing you to
create different service plans
Quality of Service
• Four priority queues for ENET and eight priority queues for downstream PVC so
you can ensure mission-critical data gets delivered on time.
• Follows the IEEE 802.1p priority setting standard.
STP (Spanning Tree Protocol) / RSTP (Rapid STP)
(R)STP detects and breaks network loops and provides backup links between
switches, bridges or routers. It allows a switch to interact with other (R)STP -
compliant switches in your network to ensure that only one path exists between
any two stations on the network.
1.4 VoIP Features
IEEE 802.1Q Tagged VLAN
Your IES-1248-51V uses the IEEE 802.1Q Tagged VLAN (Virtual Local Area
Network), which allows it to deliver tagged/untagged frames. The IES-1248-51V
supports up to 4094 individual VLANs.
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