Customizing DSX-1-Compatible Units
4-3
7914-A2-GB20-00
February 1998
Table 4-1.
DSX-1-Compatible Units Configuration Options (1 of 1)
1) SDSL Card Type
Possible Settings: CP, CO
Default Setting: CP
Indicates the placement of the unit in the network configuration. To toggle the card type,
enter 1 at the Config prompt.
CP – Unit is on the customer premises side of the SDSL connection.
CO – Unit is on the central office (or central site) side of the SDSL connection.
When SDSL Card Type is changed, a system message warns that the board will
automatically be reset. Enter Y to reset the board and change the type.
2) T1 Line Encode
Possible Settings: B8ZS, AMI
Default Setting: B8ZS
Specifies the type of line encoding used to ensure one’s density in the transmission
signal. To toggle the encoding method, enter 2 at the Config prompt.
B8ZS – Bipolar eights-zeroes substitution.
AMI – Alternate Mark Inversion.
3) Framing
Possible Settings: D4, Unframed, Extended Superframe
Default Setting: D4
Specifies the type of framing to be used. To toggle the framing method, enter 3 at the
Config prompt.
D4 – Commonly used framing method on T1 circuits, consisting of 12 frames of 192 bits
with the 193rd bit used for error checking and other functions. Also called Super
Framing.
Unframed – Framing is disabled.
Extended Superframe – Framing method consisting of 24 frames of 192 bits each, with
the 193rd bit providing timing and other functions. An enhanced version of D4.
4) Line Build Out
Possible Settings: 0 to 133 ft, 133 to 266 ft, 266 to 399 ft, 399 to 533 ft, 533 to 655 ft
Default Setting: 0 to 133 ft
To change the line build-out length, enter 4 at the Config command prompt. You will
then be prompted to select from the following options:
1) 0 to 133 ft
2) 133 to 266 ft
3) 266 to 399 ft
4) 399 to 533 ft
5) 533 to 655 ft
N) No change
NOTE:
Additional options may be displayed on your terminal. These other options
(for –7.5, –15, and –22.5 dB) are not for use with this product. Use of these
options will cause a weak signal and degrade performance. Select from
options 1 through 5 only.
