ZyXEL Communications MSC1024G Series User Manual page 54

Chapter 1 Getting to Know Your MSC
IP-aware Bridging
The line cards can forward frames based on the destination IP address, instead of the
destination MAC address, and replace the source MAC address with its own MAC address.
This provides better scalability and security for large-scale access networks, especially with
Ethernet.
Single End Loop Test (SELT)
This feature checks the distance to an ADSL subscriber's location.
Dual End Loop Test (DELT)
This feature (also called a Loop Diagnostic Mode test or LDM test) provides details about the
condition of an ADSL subscriber's line.
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MSC1000G/1024G/1224G Series User's Guide