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Configuration Using the NMS
44 4929 DSLAM Installation and User’s Guide 4929-A2-ZN20-30
Port Mode Setting Specify a port mode:
z Fixed – The upstream and downstream rates
are fixed.
z Adaptive – The ports will automatically train
up to the best possible speed supported by the
DSLAM, the modem at the remote end, and
the copper cable pair connecting the two.
z Fixed Adaptive – The ports will automatically
train up to the best possible speed, subject to a
user-specified maximum upstream and
downstream bandwidth.
VPI/VCI Detect Setting Specify the port behavior with regard to VPI/
VCI detection:
z On – The DSLAM will monitor the line to
determine the VPI and VCI settings of the
remote ADSL modem and set itself
accordingly. If no ATM cells are detected (at
any VPI/VCI setting), the port will default to
VPI 0 and VCI 35.
z Off – The port will use the default setting of
VPI and VCI (0/35 if not changed by the
setting of VPI and VCI, below), or lock in the
VPI/VCI already discovered while VPI/VCI
detection was On.
Data Rate Setting If you have selected a Port Mode of Fixed or
Fixed Adaptive, specify the maximum upstream
and downstream rates, in bps.
Filter IP Address Settings Specify up to four IP address ranges. Packets are
accepted from source IP addresses in the ranges
specified.
Protocol Setting Click in the check box to enable Protocol Setting
detection. Select Allow Selected and specify up
to four Ethertypes allowed on the ports.
DHCP Option 82 Specify whether DHCP Option 82 is enabled,
and if it is, whether packets are identified by IP
address or circuit ID. This identifier is added to
packets to let your DHCP Server recognize
which DSLAM port an IP address request is
coming from, thereby allowing the DHCP
Server to limit the number of IP addresses
assigned per port.
VPI and VCI Specify a default VPI and VCI if VPI/VCI
Detect Setting (above) is Off.
Parameter Description