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PacketStar
®
PSAX 12-Port Medium-Density DS1 Multiservice Module User Guide , Issue 1 Release 8.0
Chapter 5 Configuring Ports and Channels Using the AQueView
®
EMS
Configuring the Module
Loopback Default: NoLoop
Range: N/A
Format: predefined
alphanumeric
Indicates whether the port is to be used for loop-
back testing and, if so, the type of loopback to be
performed.
NoLoop The port will not be used for loopback.
LocalLoop Local loopback will be used on this port. The sig-
nal will be received from another module in the
chassis, sent through the module circuitry
(including the segmentation and reassembly
(SAR) function) and the chassis backplane to the
originating module.
LineLoop Line loop will be used on this port. The received
signal will be sent through the receiver and the
line driver, and then back out to the originating
point.
PayloadLoop The received signal is sent through the framing
chip on the module, but not on the SAR circuitry,
and then back out to the originating point. The
data link is regenerated.
Transmit Clock Default: LocalTim-
ing
Range: N/A
Format: predefined
alphanumeric
Indicates the timing source to be used on this
port. The timing source is a signal that provides a
timing reference for a transmission link.
LocalTiming Local clock source will be used as the timing
source.
LoopTiming Recovered receive clock is used as the timing
source.
Adaptive Timing Monitors the port buffers to increase or decrease
the transmission rate. Displays when the port is
configured as
Unstructured in the Data Transfer
Type field.
Table 5-2. Field Descriptions for the Medium-Density DS1 Port and Channel Configuration Window
Field Name Field Values Description