Verilink NCC 2130 (880-503285-001) Product Manual - Manual (Page 25)

Configuration
Verilink NCC 2130 User Manual 3-7
DCD) Selects normal or
forced mode for
DCD. Type “DCD” to
change.
When DCD=Y, the IDCSU asserts Data Carrier Detect at all
times.
When DCD=N, (default) the IDCSU asserts DCD when it is
receiving a valid framed signal.
D) select DS-0 (1-24) Selects the timeslots
(DS0s) to use.
Enter a range separated by a hypen (1-24) or individual
timeslots separated by commas (1,3,5,7,9,10,11,12,21).
B) timing Selects the source of
the Transmit Clock
used by the IDCSU to
transmit data toward
the T1 network.
TIU timing and DTE
timing are supported
in the NCC 2130.
TIU timing and DTE
timing are not
supported in TAC
2130-S modules or
TAC 2130-T
modules.
When connecting to a
T1 facility provided
by an interexchange
carrier (long distance
company) NET timing
is usually required.
(1)INT — The IDCSU uses an internal oscillator to generate a
1.544 MHz clock. Used only at one end of a T1 on which the
carrier uses no DACS.
(2)EXT 422 — The IDCSU uses a balanced clock signal
provided by an external source through the DIN connector
on the rear connector module.
(3)EXT TTL — The IDCSU uses an unbalanced (0V to +5V)
clock signal provided by an external clock source through
the DIN connector on the rear connector module.
(4)NET — The IDCSU uses the clock recovered from receive
data on the T1 network port for the transmit clock, this is
most often the desired option and is required if the network
provides a clock (uses a DACS).
(5)TIU — The IDCSU uses a clock on data bus C produced by
an optional TIU 2850 module installed in the same shelf.
(6)DTE — The IDCSU uses an external clock provided by the
DTE on the lead pair designated as Terminal Timing (TT) in
RS-422/RS-449/EIA 530 or Serial Clock Transmit External
(SCTE) in V.35. Use of this option requires the TT selection
for clocking. Together, TT clocking and DTE timing
establish tail circuit timing.
P) prm Performance
Response Messages
can optionally be
sent in the 4K FDL
portion of an ESF
framed T1.
1(NO) — Performance response messages received from the
network are ignored, no messages are sent
2(USER) — Performance response messages are allowed
responses and information stored in the user ESF registers
is made available. Used by pro-active carriers.
C1-C7) canned
config
Allows selection of
any of seven
configurations which
all have in common:
Framing = ESF
Line Coding = B8ZS
Density = 12% + 80
zeroes
Timing = NET
DTE Clocking = ST
Mode = 64K
Canned Configurations C1 through C7 use these data rate
and timeslot assignments:
C1 — 1.536 Mbit/s using DS0s 1-24
C2 — 768 kbit/s using DS0s 1-12
C3 — 512 kbit/s using DS0s 1-8
C4 — 384 kbit/s using DS0s 1-6
C5 — 256 kbit/s using DS0s 1-4
C6 — 128 kbit/s using DS0s 1-2
C7 — 1.472 Mbit/s using DS0s 1-23
O) poll far end If enabled on a point-
to-point ESF T1, far
end polling can
monitor alarms at a
remote CSU.
(1) yes — far end polling is used, requires FDL continuity
from end to end, a DACS in the T1 usually terminates the
FDL making this unusable, note that ESF is required to use
this option.
(2) no — far end polling is not supported.
Menu Option Description Instructions