Specifications

D8E1T1 Installation and Operation Manual Chapter 3 Configuration
D8E1T1 Module Configuration 3-7
Table 3-1. Individual Link Configuration Menu Field Descriptions (Cont.)
Field Description
Clear T1/E1: (option field) “Clear” refers to a condition where the module passes data through without
reformatting it in any way (essentially, the module acts the same as a wire). The
following selections are available:
• Framed - Framing is conveyed through the switch fabric. Allows alarms and
statistics to be displayed.
• Unframed - Full bandwidth of the frame is used for data. Passes data
without keeping track of alarms and statistics. Limited diagnostics functions
are available.
• Disabled - Framing is terminated and regenerated. Turns off Clear mode
(uses standard framing pattern and detects all alarms/errors). All diagnostic
functions are available.
Note: When using Clear T1 (E1) mode, make the connection ensuring that
25 (32) DS0s have connections mapped. This is necessary because of
the way Clear T1 mode operates, taking the framing bits from the first
24 (31) DS0s and sending them all out through the 25th (32nd) DS0.
See the Connection Maps Chapter in the DXC-100 Installation and
Operation Manual for details on connection mapping.
LineType: (option field) This field determines the type of framing used on the line. When Clear T1/E1 is
set to Framed or Disabled, the available line types are as follows:
• T1-ESF B8ZS
• T1-ESF AMI 62411
• T1 D4 B8ZS
• T1 D4 AMI 62411
• E1
• E1-CRC
• E1-CAS
• E1 CAS-CRC
Note: The Long Haul and Short Haul line interface options are available with
E1 line types, and the LBO (Line Build Out) option field is available
with T1 line types.
When Clear T1/E1 is set to Unframed, the available line types will be T1 AMI,
T1 B8ZS, or E1.
Network Loop:
(option field)
This parameter determines the D8E1T1 module’s ability to respond to
diagnostic commands received from the network supplier. Enabled indicates
that the D8E1T1 Module will respond to loop commands received from the
network supplier, and Disabled indicates that it will not respond. Selectable
only in Clear T1/E1 Disabled mode.
Tx Yel Alm/RAI:
(option field)
Yes causes the T1 or E1 circuit to discard data and send a yellow alarm (T1) or
RAI (E1) if it is in a red alarm condition for the number of seconds selected in
the Recover Time field. Yes must be chosen if the network supplier is a
common carrier, such as a telephone company. Selectable only in Clear T1/E1
Disabled mode.