Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
The Port 1 Configuration parameters window for T1 is shown in Figure 5-21. Port 2 through Port 8
windows are identical to this one, and therefore are not shown. Each of the eight T1 M-DACS ports has
ten configurations that must be set by the user. Each of these configurations is described below.
1. When “Fast LOF Detector” is (checked) the Fast Loss Of Frame Detector is enabled. This feature
in not used in the M-DACS
2. The Switch Delay setting is the amount of time in milliseconds that a failed condition must exist
before a MAP or Routing switch takes place. The range is from 0.5ms to 127.5ms in 0.5ms steps.
A typical setting for a 4 node network is 1.0ms. RFL recommends adding at least 0.5ms for each
additional node.
3. The LOF Delay setting is the amount of time in milliseconds LOF (Loss Of Frame) is present
before a MAP or routing switch takes place. This selection is not used since the “Fast LOF
Detector” selection is not used in the M-DACS.
4. There are two Path Types, XC and Line. XC (cross connect mode) allows DS0 grooming. If Line
(line switch mode) is selected, no DS0 grooming is possible.
5. The Jitter Buffer setting sets the depth of the jitter buffer. The three possible settings are 128 bits,
32 bits or Disabled.
6. There are two Frame Types for T1. These are SF (superframe) and ESF (extended superframe).
These settings are dependent on your system application.
7. There are two Line Code types for T1. These are B8ZS (Bipolar Eight Zero Substitution) and AMI
(Alternate Mark Inversion). These settings are dependent on your system application.
M-DACS-T1 RFL Electronics Inc.
February 28, 2006 5-33 (973) 334-3100
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