Metrodata ATM CBR DSU, User Manual

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DS3 CBR PORT CONFIGURATION
76-02-031E 88
12. 4 DS3 ATM Set-up
The configuration of the DS3 port ATM characteristics is set using the path MAIN SET-UP/
ATM SET-UP/ DS3 PORT
The menu is used to select the PVC that is to be used for the circuit emulation (CBR) traffic.
Figure 12.2 DS3 ATM set-up
12 . 4. 1 VPI
This item specifies the Virtual Path to be used for circuit emulation traffic. VPI values
between 0 and 255 can be selected.
12 . 4. 2 VCI
This item specifies the Virtual Channel to be used for circuit emulation traffic. VCI values
between 0 and 65535 can be selected.
Notes:
a) If VPI=0 and VCI=0, then the traffic generated cannot be distinguished from idle cells and
will be discarded.
b) The following fields of the ATM cell header for the PVC selected for the circuit emulation
traffic are all zero:
GFC - Generic Flow Control
PT - Payload Type
CLP - Cell Loss Priority
12. 5 DS3 Physical Layer Alarms
The DS3 physical layer alarms are defined as follows:
Figure 12.3 DS3 Physical alarms
DS3 PORT
VPI 15
VCI 1024
Display Description
LOS Loss of Signal, the Layer 0 receiver cannot detect signal
AIS Alarm Indication Signal detected