USRobotics U.S. Robotics SureConnect ADSL Ethernet/USB Router - Manual (Page 182)

U.S. Robotics SureConnect ADSL Ethernet/USB Router User Guide
The following table briefly describes these options.
Service
Name
Description
cbr Constant Bit Rate Supports real-time applications requiring a
fixed amount of bandwidth. The applications
produce data at regular rates.
rtvbr
Real Time
Variable Bit Rate
Supports time-sensitive applications such as
voice. In these applications the rate at which
cells arrive are varied. But these cells need
to be delivered in a timely manner with
minimal delay.
nrtvbr
Non Real Time
Variable Bit Rate
Supports applications that have no
constraints on delay and delay variation, but
still have variable-rate and bursty traffic
characteristics. Applications include packet
data transfers, terminal sessions, and file
transfers.
ubr
Unspecified Bit
Rate
Best effort service that does not require
tightly
constrained delay and delay variation. UBR
provides
no specific quality of service or guaranteed
throughput. The traffic is “at risk” because
the network provides no performance
guarantees for UBR traffic. The traffic
descriptor is similar to IP’s “best effort”
approach to traffic management.
<encaps> Specifies whether ATM Adaptation Layer is aal2 or aal5. For voice (not support by
USR9003) connections, AAL2 must be specified. For data connections, AAL5 must be specified.
-peak <value> Defines the fastest rate a user can send cells to the network. It is expressed in
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