PairGain HIGAIN HRU-412 User manual

HIGAIN REMOTE UNIT
PAIRGAIN TECHNOLOGIES, INC.
ENGINEERING SERVICES TECHNICAL PRACTICE
™150-412-106-06d¨
SECTION 150-412-106-06
Model List
Number Part Number CLEI Code
HRU-412 6 150-1103-06 T1LIEF04AA
L
TELEPHONE CO PROPERTY
L
P
2
OK
MAR
ES
OK
MAR
ES
ESF
SF
ERR
ZS
AMI
BPV
B8
NET
CI
LOS
LOS
L
P
1
C
O
D
E
C
I
L
I
N
E
M
O
N
C
I
L
I
N
E
M
O
N
L
O
C
R
E
M
F
R
M
R
S
X
M
T
R
C
V
L
B
A
L
M
+
-
60 mA
MON
2
3
2
HDSL
DS1
HRU 412
H G REM UNIT
IAIN

150-412-106-06, Revision 06
ii October 28, 1998 HRU-412 List 6
Revision History of This Practice
©Copyright 1998 PairGain Technologies, Inc.
PairGain, and HiGain are registered trademarks of PairGain Technologies, Inc.
Information contained in this documentis company private toPairGain Technologies, Inc.,
and shallnot bemodified, used, copied,reproduced or disclosed in whole orinpart without
the written consent of PairGain.
Other product names mentioned in this practice are used for identification purposes only
and may be trademarks or registered trademarks of their respective companies.
Revision Release Date Revisions Made
04 November 15, 1994 Minor updates
05 September 22, 1998 Reformat
06 October 28, 1998 Update cover

150-412-106-06, Revision 06 Using This Technical Practice
HRU-412 List 6 October 28, 1998 iii
USING THIS TECHNICAL PRACTICE
Two types of messages, identified by icons, may appear in the text.
ABBREVIATIONS
Notes contain information about special circumstances.
Cautions indicate the possibility of equipment damage or
the possibility of personal injury.
AMI Alternate Mark Inversion
BER Bit Error Rate
BPV Bipolar Violations
B8ZS Bipolar with Eight Zero Subsitution
CI Customer Interface
CO Central Office
CPE Customer Premise Equipment
CRC Cyclic Redundancy Check
CSA Carrier Service Area
ES Errored Seconds
ESF Extended Superframe
HDSL High-bit-rate Digital Subscriber Line
HLU HiGain Line Unit
HRU HiGain Remote Unit
NI Network Interface

Abbreviations 150-412-106-06, Revision 06
iv October 28, 1998 HRU-412 List 6
RLEV Receive Level
SF Super Frame
SNR Signal-to-Noise Ratio
SPLB Special Loopback
ZBTSI Zero Byte Time Slot Interchange

150-412-106-06, Revision 06 Table of Contents
HRU-412 List 6 October 28, 1998 v
TABLE OF CONTENTS
Overview _______________________________________________ 1
Applications ____________________________________________ 2
Functional Description____________________________________ 3
Operational Capabilities........................................................... 3
Front Panel Features ................................................................ 4
Rear Panel Features.................................................................. 7
Installation _____________________________________________ 9
Unpack and Inspect the Shipment............................................ 9
Install the HRU-412 List 6....................................................... 9
Installation Test...................................................................... 11
Configure, Provision, and Monitor Performance _____________ 12
Connect a Dumb Terminal..................................................... 12
Logging On and Using the Menus......................................... 13
View Span Status..................................................... 16
Set Clock ................................................................. 17
System Settings ....................................................... 19
View Performance Data .......................................... 20
View Performance History...................................... 21
View Alarm History ................................................ 22
Loopbacks _____________________________________________ 24
Specifications __________________________________________ 26
Product Support________________________________________ 28
Technical Support.................................................................. 28
Warranty ................................................................................ 28
FCC Compliance.................................................................... 29
Modifications ......................................................................... 30

List of Figures 150-412-106-06, Revision 06
vi October 28, 1998 HRU-412 List 6
LIST OF FIGURES
Figure 1. HRU-412 List 6 Front Panel ...................................................4
Figure 2. HRU-412 List 6 Rear Panel.....................................................7
Figure 3. HRU-412 List 6 Pinouts........................................................10
Figure 4. HRU-412 List 6 Craft Port Wiring........................................12
Figure 5. Remote Log On Screen. ........................................................14
Figure 6. Main Menu, Local Log On....................................................15
Figure 7. Span Status Screen, No Doublers in Use ..............................16
Figure 8. Span Status Screen, Doublers in Use ....................................17
Figure 9. Set Clock Screen ...................................................................18
Figure 10. System Settings Menu.........................................................19
Figure 11. Performance Data Screen....................................................20
Figure 12. Performance History Screen................................................21
Figure 13. Alarm History Screen..........................................................22
Figure 14. HRU-412 List 6 Loopbacks ................................................24

150-412-106-06, Revision 06 List of Tables
HRU-412 List 6 October 28, 1998 vii
LIST OF TABLES
Table 1. HDSL Loss Over Cables.......................................................... 2
Table 2. HRU-412 List 6 Front Panel Components .............................. 5
Table 3. Rear Panel Components .......................................................... 8
Table 4. HRU-412 List 6 Alarm History Screen Definitions............... 23

List of Tables 150-412-106-06, Revision 06
viii October 28, 1998 HRU-412 List 6

150-412-106-06, Revision 06 Overview
HRU-412 List 6 October 28, 1998 1
OVERVIEW
The PairGain®HiGain®Remote Unit Model HRU-412 List 6 is the remote
end of a repeaterless T1 transmission system. An HRU-412 List 6 connects
to aHiGain Line Unit (HLU),creating aHiGain system which provides 1.544
Mbps transmission on two unconditioned copper pairs over the full Carrier
ServiceArea (CSA)range. The CSA encompasses approximately 12,000 feet
of AWG 24 wire or 9,000 feet of AWG 26 wire, including bridge taps and
gauge changes. A HiGain system utilizes 2B1Q High-bit-rate Digital
Subscriber Line (HDSL) transmission technology.
The HRU-412 List 6 complies with ANSI T1E1.4, T1.403-1989, and
T1E1.4/92-002R2 technical standards and recommendations. The HRU-412
List 6 mounts in a single slot of an industry standard 400 Mechanics type
shelf. The system also complies with GR-63 Core of Network Equipment
Building System (NEBS) Generic Equipment requirements, and Transport
System Generic Requirements (TSGR) common requirements
TR-TSY-000499.
The HRU-412 List 6 features:
•Customer Interface (CI)
•Front panel DS1 and HDSL LEDs
•Generic and addressable repeater loopback activation codes
•Metallic Smart-Jack loopback (conforms to TR-TSY-000312)
•Provisioning switches for customer premise equipment current, receive
level, and transmit loss of signal-initiated loopback or alarm
•HDSL line powered—no local power required
•Front panel jacks for test access
•Craft port
•CPE current monitor test points
•Front panel HDSL margin threshold indicator for each loop
•Lightning and power cross protection on HDSL and DS1 interfaces
•784kbps full-duplex 2B1Q HDSL transmission on two pairs
•DS0 blocking support

Applications 150-412-106-06, Revision 06
2 October 28, 1998 HRU-412 List 6
APPLICATIONS
A HiGain system, consisting of a HiGain line unit and a HiGain remote unit,
provides a quick and cost-effective way of delivering T1 High Capacity
Digital Service (HCDS) to customers over copper wire pairs. The HiGain
system can be deployed on two unconditioned, non-loaded copper wire pairs
without repeaters, and without the need for bridged tap removal or binder
group separation.
The general guidelines for HiGain system usage are that each loop must have
less than 35 dB of loss at 196 kHz, with 135 ohm driving and terminating
impedances.
Table 1 provides a guide for the loss over various cable gauges at 196 kHz
and 135 ohms. The table applies to the HDSL wire pairs between the HiGain
line unit and the HiGain remote unit. When specific loop insertion loss data
is unavailable, add 3 dB for each bridged tap and 1 dB for each cable gauge
change.
The dc cable resistance determines the simplex powering resistance path of
the loops. The maximum allowable resistance for a HiGain system is
800 ohms over two HDSL simplex loops. This means, for example, where
12 kft of AWG 24 wire equals 34.08 dB (insertion loss), resistance is at 622
ohms which is well below the limit of 800 ohms.
A HiGain system operates with a variety of other T1, POTS, Digital Data
Service (DDS) equipment, or other HiGain systems sharing the same cable
binder group. HiGain systems provide temporary or permanent DS1 service
and can provide a means of deploying service in advance of fiber-optic
transmission systems.
Table 1. HDSL Loss Over Cables
Cable Gauge Loss at 196 kHz
(db/kft) Ohms per kft
26/0.4mm 3.88 83
24/0.51mm 2.84 52
22/0.61mm 2.18 32
19/0.91mm 1.54 16