Specifications

Chapter 3 Configuration D8E1T1 Installation and Operation Manual
3-8 D8E1T1 Module Configuration
Table 3-1. Individual Link Configuration Menu Field Descriptions (Cont.)
Field Description
Unused DS0’s:
(option field)
This entry is used to select the state of unused DS0s as either Busy or Idle.
Selectable only in Clear T1/E1 Disabled mode.
Idle - The hex value 7F (11111111) is sent.
Busy - The hex value FF (11111111) is sent.
ESF Format: (option field) This entry describes the types of T1 ESF network commands to which the
D8E1T1 Module responds, and is not applicable to D4 networks. With ESF
networks, this information must be obtained from the network supplier. Choose
between 54016 (AT&T Technical Reference 54016) and T1.403 (ANSI
specification T1.403). Selectable only in Clear T1/E1 Disabled mode.
LBO: (T1 option field) This field sets the line attenuation level, and should be set to 0 dB (no
attenuation) unless the network supplier specifically requests otherwise. 0.0 dB
through 22.5 dB = long haul; 0-133 Ft. through 655 Ft. = short haul. The
available settings are:
• 0.0 dB <> Long Haul
• 7.5 dB <> Long Haul
• 15.0 dB <> Long Haul
• 22.5 dB <> Long Haul
• 0-133 Ft. <> Short Haul
• 133-266 Ft. <> Short Haul
• 266-399 Ft. <> Short Haul
• 399-533 Ft. <> Short Haul
• 533-655 Ft. <> Short Haul
Note: The LBO (Line Build Out) option field is available only with T1 line
types.
Long Haul: (E1 option field) L-Haul (Long Haul) is the physical interface selection for long connection to E1
equipment, while S-Haul (Short Haul) is the physical interface selection for
collocated E1 equipment.
Note: The Long Haul and Short Haul line interface options are available only
with E1 line types. Long Haul/Short Haul designations for E1 are defined
by authentication of signal presented to the receiving circuitry, not by
cable length. Short Haul is defined as 0 to -6 dB, and Long Haul as 0 to
-34 dB. This loss is related to cable type and cable length.
Recover Time: (T1 option
field)
This field is used to specify how quickly Red/Yellow alarms are cleared
following the recovery of the given T1 facility (e.g., valid signal and framing
present). Select either 3, 10, or 15 seconds.
Note: The Recover Time options field is available only with T1 line types.