ZyXEL Communications P870HNU-51B User Manual page 89

Figure 19 DSL PTM Interface Configuration
The following table describes the fields in this screen.
Table 16 DSL PTM Interface Configuration
LABEL
ATM PVC
Configuration
VPI
VCI
Select DSL Link
Type
Encapsulation
Mode
P-870HNU-51b User's Guide
DESCRIPTION
VPI (Virtual Path Identifier) and VCI (Virtual Channel Identifier) define a virtual
circuit. This section is available only when you configure an ATM layer-2
interface.
The valid range for the VPI is 0 to 255. Enter the VPI assigned to you.
The valid range for the VCI is 32 to 65535 (0 to 31 is reserved for local
management of ATM traffic). Enter the VCI assigned to you.
Select EoA (Ethernet over ATM) to have an Ethernet header in the packet, so
that you can have multiple services/connections over one PVC. You can set
each connection to have its own MAC address or all connections share one MAC
address but use different VLAN IDs for different services. EoA supports ENET
ENCAP (IPoE), PPPoE and RFC1483/2684 bridging encapsulation methods.
Select PPPoA (PPP over ATM) to allow just one PPPoA connection over a PVC.
Select IPoA (IP over ATM) to allow just one RFC 1483 routing connection over
a PVC.
Select the method of multiplexing used by your ISP from the drop-down list.
Choices are:
• VC/MUX: In VC multiplexing, each protocol is carried on a single ATM
virtual circuit (VC). To transport multiple protocols, the Device needs
separate VCs. There is a binding between a VC and the type of the network
protocol carried on the VC. This reduces payload overhead since there is no
need to carry protocol information in each Protocol Data Unit (PDU)
payload.
• LLC/SNAP-BRIDGING: In LCC encapsulation, bridged PDUs are
encapsulated by identifying the type of the bridged media in the SNAP
header. This is available only when you select EoA in the Select DSL Link
Type field.
• LLC/ENCAPSULATION: More than one protocol can be carried over the
same VC. This is available only when you select PPPoA in the Select DSL
Link Type field.
• LLC/SNAP-ROUTING: In LCC encapsulation, bridged PDUs are
encapsulated by identifying the type of the bridged media in the SNAP
header. This is available only when you select EoA in the Select DSL Link
Type field.
Chapter 5 WAN Setup
89