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4 Configuring the WAN Interface
4-2 Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Table 4-2 the ADSL uplink mode.
T amet PVC Configuration page
lists the information to be collected before configuring
able 4-2 Par er for the ATM
Parameter Description
VPI/VCI
It specifies the VPI and VCI of the PVC. The value is set as 8/35 by
default.
The VPI and VC
I of the PVC of the terminal should be consistent
with those of the PVC of the devices on operator networks so that
the connection between the terminal and the devices can be set up
through the PVC.
Service
Category
z
z
z
z
ll
riable rate
It specifies the traffic management ty
pe used by the PVC.
UBR Without PCR: It refers to an unspecified bit rate without a
peak cell rate. Since the transmission rate is not specified, the
ATM network tries its best to transmit UBR user information,
which is called the best effort. In this case, however, the
transmission quality cannot be ensured. For example, the cell
loss and the delay and jitter of cell transmission may occur. This
type is applicable when an end-to-end fault tolerance mechanism
or protocol exists at an upper layer and when no stringent
requirement is imposed on the n
etwork transmission capability.
z
UBR With PCR: It refers to an unspecified bit rate with a peak
cell rate.
CBR: It refers to a constant bit rate. Fixed requirements are
imposed on the bandwidth (rate). This type is applicable to
real-time tr
ansmission of audio and video signals.
Non Realtime VBR: It refers to a non-real-time variable bit rate.
No stringent requirement is imposed on the cell delay. For
example, when a user retrieves the MPEG-2 video from the
video server through the ATM network, seconds of network
delay does not affect the video quality. You should set
transmission rates, such as the PCR and the SCR, on the
network, thus reducing the cell loss
rate.
Realtime VBR: It refers to a real-time variable bit rate. The ce
delay is restricted stringently. This type is mainly used for
real-time services, such as the video output by a va
encoder, video monitoring, and compressed voice
communication.
Connection
al type
It specifies the protocol used by the PVC. You should select the
protocol that meets the requirements of the DSLAM. The option
protocols va
ry with the working mode of the PVC.
Encapsulation
Mode
It specifies the packet encapsulation mode. It is ass
Internet Service Provider.
igned by the
Enable 802.1q It specifies whether to enable the VLAN function.