Specifications

Installation and Operation Manual Chapter 3 Configuration
ASMi-54C LRS-102 Ver. 2.0 Configuring Physical Layer Parameters of SHDSL Lines 3-7
Parameter Function Values
TC Layer Selects the Transmission Convergence
layer used by the ASMi-54C module.
All the module ports use the same
Transmission Convergence layer (the
last selection is automatically applied
to all the ports)
64/65-OCTET – TC layer uses 64/65-octet
encapsulation. This mode supports only packet
traffic over a single line (wire pair).
HDLC – TC layer uses HDLC encapsulation. This mode
enables using multiple lines (wire pairs).
Default: 64/65-OCTET
STU Selects the port operating mode.
All the module ports use the same
mode (the last selection is
automatically applied to all the ports)
CENTRAL – ASMi-54C ports operate in the SHDSL
terminal unit – central mode (also referred to as
STU-C ). This is the mode to be used when the
equipment connected to the far end of the lines is
an ASMi-54 standalone unit.
REMOTE – ASMi-54C ports operate in the SHDSL
terminal unit – remote mode (also referred to as
STU-R ). This mode should be used only when the
equipment connected to the far end of the lines is
an ASMi-54C module installed in another LRS-102.
Note that in the REMOTE mode, the line probing
must always be enabled, and therefore it is not
possible to select a specific Rate.
Default: CENTRAL
Power Backoff Controls the use of transmit power
backoff.
Power backoff is used to reduce the
transmit power below the nominal
value specified in the standards: this
reduces interference caused by your
signal to other equipment using pairs
in the same cable, without degrading
the link transmission quality
The available selections are 0 to 31.
0 means that the nominal transmit power is always
used. Any other value indicates the maximum power
backoff value, in dB below the nominal transmit
power specified in the standards.
Default: 0
Transmission
Mode
Selects the set of regional-dependent
parameters used by the module SHDSL
modems.
All the module ports use the same
mode (the last selection is
automatically applied to all the ports)
ANNEX A/F – Compliance with Annex A or F of ITU-T
Rec. G.991.2, required for compatibility in North
American networks.
ANNEX B/G – Compliance with Annex B or G of ITU-T
Rec. G.991.2, required for compatibility in European
networks.
Default: ANNEX B/G