255-700-467
A-17
PacketStar
®
PSAX 4-Port Voice 2-Wire Office Module User Guide
, Issue 1
Release 9.0.0
Appendix A Reference Information
4-Port Voice 2-Wire Office Module Line Status Table
4-Port Voice 2-Wire Office Module Line Status Table
ATM Service Categories in the PSAX System
ATM Service Category Descriptions
The PSAX system support of defined ATM quality of service (QoS) categories
is described in Table A-8.
Priority of ATM Service Categories in the PSAX System
The attributes of the categories of service supported by the PSAX system soft-
ware are identified in Table A-9. The service examples in this table are
intended simply as illustrations; you should choose your service category
based on your network applications supported by the PSAX system. The flex-
Table A-7. 4-Port Voice 2-Wire Office and 8-Port Voice 2-Wire Station Line Status Codes
Bit Value
Alarm
Description
1
NoAlarm
No alarm is present
2
SignalingFailureState
Signals failure state
4
FacilityLoopBack
Not currently supported
8
Maintenance
Maintenance
16
Out Of Service
Out of Service
32
OtherFailure
Any other line status not shown in this table
Table A-8. PSAX System-Supported Quality of Service Category Descriptions
ATM Service Category
Description
Constant Bit Rate (CBR)
This service offers consistent delay predictability. CBR is used for
applications such as circuit emulation, voice, and video.
Real Time Variable Bit Rate
(VBR-rt)
This service offers low delay variance, but requires access to a variable
amount of network bandwidth. VBR-rt is used for applications such
as packet video and voice.
Non-Real Time Variable Bit
Rate (VBR-nrt)
This service allows delay variance between the delivery of cells. VBR-
nrt is used for data applications that have potentially bursty traffic
characteristics.
Guaranteed Frame Rate
(GFR)
This service allows delay variance and offers a minimum cell rate
guarantee. When used with frame-based data encapsulated in AAL5
PDUs, it provides frame-based cell discard. GFR is used for frame relay
or ethernet over ATM.
Unspecified Bit Rate (UBR)
This service allows for best-effort transport by the network. Cells are
transported by the network whenever bandwidth is available and the
user presents traffic.
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