Table of Contents
Advertisement
Variable
Framing
Line Coding
Line Mode
Line BuildOut
Value
The Framing Type for the T1/E1 data line.
Options for T1:
Extended Super Frame (ESF)— 24
consecutive 193-bit frames of data.
Super Frame (SF)—12 consecutive
193-bits of data.
Unframed—the non signaling or unframed
framing format is a simplified version of
the T1 super frame.
The default value is ESF.
Options for E1:
E1—a single E1 frame consists of 256
bits, grouped into 32 octets or time slots.
The timeslots are numbered 0 to 31.
E1CRC
The default value is E1CRC.
The Line coding type of the T1/E1 link.
Options:
Binary Eight Zero Substitution (B8ZS)—
replaces any sequence of eight
consecutive zeros with {000VB0VB}.
Alternative Mark Inversion (AMI)—
encodes a signal by inverting one of the
two consecutive high polarity data bits.
High Density Bipolar With 3 Zero
Substitution (HDB3)—replaces any
sequence of four consecutive zeros with
000V or B00v.
For T1, the default value is B8ZS.
For E1, the default value is HDB3.
The Line Mode.
Options:
Channel Service Unit (CSU)—select if
cable length is equal to or more than 655
feet.
Select Data Service Unit (DSU)—select if
cable length is less than 655 feet.
The default value is DSU.
The level of attenuation (in decibels)
required for the devices on each end of a
T1 line to communicate
Options:
- 0 db
- 7.5 db
- 15 db
- 22.5 db
You can configure Line BuildOut only for
T1 CSU Line Mode.
WAN advanced configuration
Configuration Guide
91
Advertisement
Table of Contents
