
Configuring Line Services
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Parameter: Line Coding
Default: B8ZS
Options: AMI
| B8ZS
Function: Selects a line coding method. Alternate Mask Inversion (AMI) line coding
is bipolar: a binary 0 is transmitted as zero volts and a binary 1 is
transmitted as either a positive or negative pulse, opposite in polarity to
the previous pulse. (When configured for AMI line coding, the MCT1 link
module remains in synchronization upon receiving up to 45 consecutive
0s.)
B8ZS (Bipolar with 8-Zero substitution) line coding replaces a block of
eight consecutive binary 0s with an 8-bit B8ZS code containing bipolar
violations in the fourth and seventh bit positions of the substituted code.
In the receive direction, the B8ZS code is detected and replaced with eight
consecutive binary 0s.
Instructions: Specify the line coding method.
MIB Object ID: 1.3.6.1.4.1.18.3.4.8.2.1.10
Parameter: Line Type
Default: ESF
Options: SF/D4
| ESF | Unframed T1
Function: Specifies the framing format.
Instructions: Select ESF or SF/D4 based on the frame format required by the
associated T1 equipment.
MIB Object ID: 1.3.6.1.4.1.18.3.4.8.2.1.9
Unframed T1 Use to match the line type.
SF/D4 Transmits superframes consisting of 12 individual
frames. If this option is chosen, the FDL port actions do
not apply and their buttons do not appear in the MCT1
Port Actions Window.
ESF Transmits superframes consisting of 24 individual
SF/D4 frames and provides enhanced signaling and
synchronization.
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