Planet Technology G.SHDSL.bis Bridge Router GRT-504 - Manual (Page 137)

GRT-504 4-Wire G.SHDSL.bis Firewall Router User’s Manual
For dynamic IP of PPPoA and PPPoE, you do not need to setup IP address and subnet mask.
There is a unique VPI and VCI value for Internet connection supported by ISP. The range of VIP is
from 0 to 255 and VCI from 0 to 65535.
VPI (Virtual Path Identifier) : for set up ATM Permanent Virtual Channels(PVC).
VCI (Virtual Channel Identifier) : for set up ATM Permanent Virtual Channels(PVC).
There are two types of encapsulation types, VC-Mux and LLC.
You can setup virtual circuit quality of service, VC QoS, using qos command. The router supports
UBR, CBR, VBR-rt and VBR-nrt. Move the cursor to qos and press enter.
>> class
Configure QoS class
pcr Configure peak cell rate (kbps)
scr Configure sustainable cell rate (kbps)
mbs Configure max. burst size (cell)
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 requires a static amount of bandwidth that is
avilable during the connection life time. This bandwidth is characterized by Peak Cell Rate (PCR).
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 signle 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 comferencing, that require tightly constrained delays and delay variation.
VBR-rt is characterized by a peak cell rate (PCR), substained cell rate (SCR), and maximun burst
rate (MBR).
VBR-nrt (Varible Bit Rate non-real-time) is intended for non-real-time applications, such as FTP,
e-mail and browsing.
PCR (Peak Cell Rate) in kbps: The maximum rate at which you expect to transmit data, voice and
video. Consider PCR and MBS as a menas of reducing lantency, not increasing bandwidth. The
range of PCR is 384kbps to 11392kbps
SCR (Substained Cell Rate): The sustained rate at which you expect to transmit data, voice and
video. Consider SCR to be the true bandwidth of a VC and not the lone-term average traffic rate.
The range of SCR is 384kbps to 11392kbps.
MBS (Maximum Burst Size): The amount of time or the duration at which the router sends at PCR.
The range of MBS is 1 cell to 255 cells.
ISP command can configure account name, password and idle time. Idle time is from 0 minute to
300 minutes.
Most of the ISP use dynamic IP for PPP connection but some of the ISP use static IP. You can
configure the IP type: Dynamic, Fixed and Unnumbered. The setting is via ip_type command.
You can review the WAN interface configuration via list command.
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