ATL Telecom AM2 - Manual (Page 33)

ATL User Guide
AM2 G.SHDSL Modem
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The SHDSL modem supports up to 8 PVCs. WAN 1 was configured via BASIC except for QoS. If you want to
setup PVCs, 2 to 7, the parameters are setup in WAN. On the other hand, unless two or more Internet Services
with ISPs are required you do not need to setup WAN.
The WAN Number 1 will have parameters setup in Basic Setup. If you want to setup another PVC, you can
configure them in WAN 2 to WAN 8.
Enter the parameters.
If the WAN protocol is PPPoA or PPPoE with dynamic IP, leave the default WAN IP address and Subnet Mask
as default setting. The system will ingore the IP address and Subnet mask information but deleting or leaving
blank the items will cause a system error.
If the WAN protocol is IPoA or EoA, leave the ISP parameters as default setting. The system will ignore the
information but deleting or leaving blank the items will cause system error.
QoS (Quality of Service): The Traffic Management Specification V4.0 defines ATM service catalogues that
describe both the traffic transmitted by users onto a network as well as the Quality of Service that the network
needs to provide for that traffic.
UBR (Unspecified Bit Rate) is the simplest service provided by ATM networks. There is no guarantee of
anything. It is a primary service used for transferring Internet traffic over the ATM network.
CBR (Constant Bit Rate) is used by connections that require a static amount of bandwidth that is available
during the connection life time. This bandwidth is characterized by Peak Cell Rate. Based on the PCR of the
CBR traffic, specific cell slots are assigned for the VC in the schedule table. The ATM always sends a signal
cell during the CBR connection's assigned cell slot.
VBR-rt (Varible Bit Rate real-time) is intended for real-time applications, such as compressed voice over IP and
video conferencing, that require tightly constrained delays and delay variation. VBR-rt is characterized by a