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PLANET Technology Corp. GRT-101/401 User’s Manual
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Also, GRT-101/GRT-401 allows you to assign the connection rate directly by
setting the N parameter of “n*64” command:
admin# setup shdsl n*64 <0~36>
where “0” indicates that the adaptive mode will be used to automatically train
up to the ideal line speed. The other valid value of N parameter ranges
between 3 and 36. Do not set the N value to 1 or 2. For example, to configure
the SHDSL physical layer data rate to 256kbps, enter:
admin# setup shdsl n*64 4
For different region, you might need to set up the SHDSL type to be “Annex_A”
or “Annex_B” by the following command:
admin# setup shdsl type Annex_B
Note that, to let your setting take effect, you have to save your changes and
reboot the system by enter:
admin# write
3.12.2 ATM virtual connection
There are two types of ATM connections: (1) virtual paths, identified by virtual
path identifiers (VPI); and (2) virtual circuit, identified by the combination of a
VPI and a virtual circuit identifier (VCI). Also, there are two encapsulation
methods for carrying bridged and routed PDUs in the payload field of ATM
adaptation layer (AAL) type 5, which are defined in RFC 1483, multi-protocol
encapsulation over AAL 5. The LLC encapsulation method multiplexes multiple
protocols on a single ATM virtual circuit. Each protocol is identified in the 802.2
LLC header of the packet. The VC based multiplexing method carries each
protocol on a separate ATM virtual circuit. This method is sometimes used in
private networks, in which PVC creation is very economical.
Note: Each VC is expressed as WAN x, where x is a number between 1 and 8. GRT-101/GRT-401 comes
pre-configured with one ATM VC (WAN 1 with VPI/VCI = 0/32) already established. The WAN 1 port is ready to send
and receive network traffic via IPoA protocol with LLC encapsulation. You may need to modify the pre-configured ATM