Section 311-580-20B
030-101527 Rev. B
2
0407IBRB
performance degradation, thereby improving the availability of
Hi-Cap T1 circuits.
1.4
Product Mounting
The 3115-80 is a 200 MECHANICS
NIU and makes electrical
connections to the Facility and CPE sides of the circuit through
a 56-pin card-edge connector of a 200- or 400-mechanics type
mounting, using industry-standard pin assignments. The mount-
ing assembly is usually mounted on an equipment backboard at
the customer location, after the building entrance terminal and
primary protection. Westell offers a wide range of single and
multiple slot mountings available in both backboard (wall) and
rack mount versions for NIUs. In some applications it may be de-
sirable to situate the NIU in outside plant cabinets or enclosures.
The NIU is fully qualified for operating over the temperature
range of -40 to +65
°
C (temperature hardened).
1.5
Product Features
The 3115-80 offers the following features.
Full-featured T1 NIU loopback device plus detailed T1 per-
formance monitoring and reporting at the customer facility
interface
Loopback activation and deactivation using inband (un-
framed or SF/ESF framed) or ESF Data Link codes
Addressed loopback control with 16-bit pattern for TER
(T1 Extension Repeater) applications
CPE-to-Facility LBO provisionable from 0 to 22.5dB in 7.5
dB increments
Alternate self-aligning CPE-to-Facility LBO that automati-
cally protects the network from a mis-optioned customer
LBO
Enhanced sectionalization capabilities via AIS-CI and
RAI-CI alarm signals as defined by T1.403-1998
Derives and maintains DS1 performance statistics inde-
pendently for each direction of transmission
Supports both 30-day stored as well as real-time perfor-
mance reporting modes
Flexible DS1 performance reporting options
:
Local, non-intrusive access to PM parameters via a
front-panel local craft interface port
Remote, intrusive access during loopback to PM pa-
rameters via TL1 commands and responses in the ESF
Data Link
Remote, non-intrusive access to PM parameters via
TL1 commands and responses in the Data Link, by use
of a Test Head, without affecting customer payload
Remote, non-intrusive real-time reporting of PM pa-
rameters via 1-second NPRM or SPRM reports in the
Data Link per ANSI T1.403-1998
On board test pattern generator
Notepad craft screen for documenting information about
the circuit
User-configurable alarm threshold craft screen
Integral real-time clock provides time stamping of all per-
formance information
Selectable powering option (via jumper option) for span or
local power
Front-panel test points for measuring span current
Monitor-type bantam jacks on FAC IN and FAC OUT ports
for transmission path monitoring
Front-panel craft interface port (serial RS-232, VT-100) for
local, non-intrusive PM extraction, unit set up, test code
generation and circuit maintenance
Remote provisioning and query of options (TL1 non-intru-
sive or 16-bit intrusive)
Front-panel LEDs indicate status of:
PWR (Power)
LB
(Loopback)
FLOS
(Facility Signal Status)
CLOS
(CPE Signal Status)
ESF
(ESF Framing detected from the facility)
B8ZS
(B8ZS detected from the facility)
Internal per-circuit local power fusing
Compliant with: UL 60950, CAN/CSA C22.2 No. 60950-00,
and NEBS
Operates over the -40 to +65
C temperature range allow-
ing deployment in outside plant (OSP) enclosures and
cabinets; Temperature Hardened
2.
APPLICATIONS
The NIU can be used to terminate a T1 metallic span facility or
as an adjunct to a lightwave multiplexer when DS1 circuits are
extended to a customer location on fiber facilities. The CPE con-
nections are intra-building.
The unit is situated at the customer’s premises and functions as
a maintenance interface between the T1 metallic span or fiber
multiplexer facility and the CPE. In addition to conventional
NIU functions such as loopback, the NIU collects performance
data for both directions of the facility, stores the information and
reports it to the remote test center either on demand via TL1
commands or on a real-time basis via NPRMs. This perfor-
mance information can also be locally accessed via the
front-panel RS-232 craft interface port.
- NOTE -
Real-time Performance Monitoring retrieval will initially require
that the test head be updated to monitor the Facility Data Link
non-intrusively for performance information.
