Chapter 3 System Features
PSAX System Software Features
3-54
255-700-447
PacketStar
®
PSAX 2300 Multiservice Media Gateway User Guide
, Issue 1
Release 9.0.0
ATM Traffic Management
Guaranteed Frame
Rate
The Guaranteed Frame Rate feature for ATM traffic management provides
the GFR.2 service type on ATM PVC connections. The GFR.2 service type
enables users to specify a cell transmission rate up to the PCR rate, but the
network can commit to only carry cells in complete unmarked frames at the
MCR rate. Traffic transmitted in excess of MCR and MBS rates are delivered
within the limits of available resources. The fairness policy is network spe-
cific.
The Guaranteed Frame Rate (GFR) feature for ATM Traffic Management
operates on the following PSAX I/O modules:
•
12-Port Medium-Density DS1 Multiservice
•
12-Port Medium-Density DS1 IMA
•
21-Port High-Density E1 IMA
•
21-Port High-Density E1 Multiservice
•
1-Port Channelized DS3 Multiservice
•
1-Port Channelized STS-1e, T1 Format
•
1-Port DS3 IMA
•
3-Port DS3/E3 ATM Protection
•
3-Port DS3/E3 ATM
•
1-Port OC-12c/STM-4c Multimode and Single-Mode
•
4-Port OC-3c/STM-1 Multimode and Single-Mode
•
1-Port Channelized OC-3/STM-1 Unstructured CES/ATM Multimode and
Single-Mode (
STM-1 ATM mode only
)
•
4-Port Quadserial
Usage Parameter
Control
Usage parameter control (UPC) allows the end system to police ingress con-
nections for service level agreement compliance. After a set of service catego-
ries is specified, UPC is given a set of parameters for each, describing the traf-
fic presented to the network and the quality of service the network requires.
A number of traffic control mechanisms are defined, which the network may
use to meet the QoS objectives.
Note:
The feature that was formerly known as “Rate Shaping” is now
called “ATM Traffic Shaping” to distinguish it from the”Cell bus
traffic shaping” feature, which was formerly called “Traffic Shap-
ing”.
UPC Support
UPC support is available on these modules:
23N75
1-Port Channelized OC-3/STM-1 Unstructured CES/ATM
Multimode
23N76
1-Port Channelized OC-3/STM-1 Unstructured CES/ATM
Single-Mode
23N72
1-Port OC-12c/STM-4c Multimode