D-Link DSL-2750B User Manual page 92

Section 3 - Configuration
LAN MAP WAN
This function can support to get Vendor Class ID (option 60) or support to
get first 6 digit MAC address from client device and map it with WAN
interface.
We deployed such concept by connecting IP phone on it and let device
learn from DHCP request (Option 60 or Option 61), then map it to the
correct PVC. Such IP phone can map to the voice PVC (1/33 as our
vendor ID mapping configuration) and register at the SIP server. The
traffic of the specific IP phone can only pass through the mapped WAN
interface and cannot flow to or from other WAN interface.
Click Add to start the settings.
Device vendorid: DHCP Option 60 ID, such as MSFT 5.0.
Option61 String: DHCP Option 61 ID, it can support MAC address
mapping (only first 6 digits) to WAN, such as 02:10:18.
Click Apply to save the settings
D-Link DSL-2750B User Manual
92