Rate multiplier, Ds0 channel assignment, Start channel – Verilink PRISM 3002 (34-00277) Product Manual User Manual
Page 41: Port rate, Of channels, Transmit clock, Ll (local loop) detect, Rl (remote loop) detect, V.54loop
Configuration Screens
4-19
Rate Multiplier
The unit can operate at any data rate that is a multiple of 56 or 64 kbps. When
N
×
64K is selected, the ones density requirements of the T1 network line must be
ensured. When N
×
56K is selected, the unit maintains ones density for the selected
DS0 channel.
DS0 Channel Assignment
Selects whether the DTE channel assignment is made as a Contiguous group or as
Alternate channels. Selecting Alternate assures ones density but reduces the
available bandwidth from 1536 kbps to 768 kbps.
Start Channel #
The starting channel in the 24-channel DS1 bit stream must be selected in this
field. The unit then assigns the following channels automatically according to the
bit rate multiplier and the mode selected in DS0 Channel Assignment. The choices
are 1 through 24.
Port Rate
Pressing the spacebar increases the required port bit rate in increments of 56 or 64
kbps, depending on the Rate Multiplier setting. The N multiplier ranges in value
from 0 to 24.
# of Channels
This field displays the number of channels to be passed through to the DTE. The
number is determined by the Port Rate value divided by the Rate Multiplier.
Transmit Clock
This field is used to select the clock that the unit uses to sample the data
transmitted from the DTE. When set to Internal, the data is automatically
edge-aligned and sampled directly with the transmit data clock also supplied to the
DTE as Transmit Clock. The External option uses the external clock supplied by
DTE. The Oversample option is used to operate the port as a low-speed
asynchronous port. In this mode, the port rate should be set to at least four times
the asynchronous data rate (depending on the degree of allowable distortion for the
particular DTE equipment used).
LL (Local Loop) Detect
Allows enabling or disabling pin J (V.35) or pin 18 (EIA-530) to loop-up the near
(local) unit.
RL (Remote Loop) Detect
Allows enabling or disabling the monitoring of pin BB (V.35) or pin 21 (EIA-530)
to loop-up the far unit.
V.54 Loop
Selecting Enable allows the unit to respond to in-band V.54 loop commands. If
Disable is selected, the unit ignores these commands.