The ADTRAN E220 HDSL / HDSL2 Fuse/Alarm/
Control (HFAC), P/N 61221051L1, unit is a shelf
controller unit designed for operation in the ADTRAN
E220 HDSL / HDSL2 Central Office (CO) shelf.
Figure 1 is an illustration of the E220 HFAC.
Revision History
Revisions to this practice will be summarized in this
paragraph.
The E220 HFAC provides a common access point to
performance and provisioning information related to
each HDSL / HDSL2 transceiver unit for the central
office (HTU-C and H2TU-C) deployed in the E220
shelf. By addressing the HTU-C or H2TU-C, the HFAC
also provides support for the HDSL / HDSL2 range
extender (HRE and H2R) and the HDSL / HDSL2
transceiver unit for the remote end (HTU-R and H2TU-R).
The shelf supports one shelf controller (HFAC) and up
to 13 HTU-C / H2TU-C cards for the 23-inch shelf or 11
HTU-C / H2TU-C cards for the 19-inch shelf. A
faceplate-mounted DB9 connector provides a VT 100
compatible terminal interface for controlling the
system.
Trademarks: Any brand names and product names included in this document are
trademarks, registered trademarks, or trade names of their respective holders.
161221051L1-5, Issue 161221051L1-5A
The HFAC supports the HTU-Cs / H2TU-Cs listed
below.
• 1242024L1• 1242002L7
• 1242002L2• 1242029L1
• 1242002L5• 1242029L2
• 1242002L6• 1244001L1
• 1245001L2• 1246001L2
• 1245001L9• 1221001L2
• 1245011L1
The differences in functionality when working with
list-specific HTU-Cs / H2TU-Cs or HREs / H2Rs, if
any, are called out in this practice. Also, the HFAC
has necessary interface software for communications
with the HCOT-CTL (ADTRAN p/n: 1240009L1,
1244051L1, 1221051L1). See appropriate HCOT
practices for installation and maintenance information.
The HFAC collects and presents performance
information for each circuit deployed in the shelf. It
also allows control of all provisioning information for
each circuit. The unit can also be configured to
provide advanced alarm processing features.
Electrical cable compliance
Table 1 shows the Compliance Codes for HFAC. The
HFAC complies with the requirements covered under
UL 1950 third edition and is intended to be installed
in an enclosure with an Installation Code (IC) of “B”
or “E.”
NOTE
This product is intended for installation in
Restricted Access Locations Only. Input
current at maximum load is 1A at -48 VDC.
Maximum output at overcurrent condition is
165 mA at -190 VDC.
Table 1. Compliance Codes
Code Input Output
ICATC-PCFC
Configuration
Operation of the HFAC is influenced by three sets of
configuration option switches (see Figures 2 and 3).
2. INSTALLATION
C A U T I O N !
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.
After unpacking the unit, inspect it for damage. If
damage is discovered, file a claim with the carrier,
then contact ADTRAN. See Warranty and Customer
Service.
S2
1 2 3 4 5 6 7 8
Up
Shelf Address
Two rotary switches (U38 and U39) are provided to
program the shelf’s address. In a system where
several shelves are under the common control of one
ADTRAN E220 HCOT-CTL System Controller, each
individual shelf must be programmed with a unique
shelf address. Addresses range from 00 to 99. In a
system that does not utilize the HCOT-CTL System
Controller, the shelf address is not used. To program
Shelf Address Select Switches
(Default = 00)
S1
1 2 3 4 5 6 7 8
Ones Tens
8
8
7
7
9
6
5
9
6
0
5
1
4
4
2
2
3
3
0
1
Faceplate
Figure 2. Configuration and Shelf Address Switches
2
61221051L1-5, Issue 161221051L1-5A
the address, select the desired address in the Options
Setup Screen (Figure 11), or set the rotary switches as
indicated in Figure 2.
Unit Options
Two banks of configuration switches (S1, S2 and S3,
see Figure 2 and 3) are used to select advanced alarm
reporting features (see Tables 2, 3 and 4).
Errored Seconds (ES) Alarm
The locations shown in Figure 4 are monitored for
errored seconds and counts are maintained for each
location.
REAR VIEW
SW3
Up
If any of these counts exceed the ES programmed
threshold (see Tables 1 and 2) an alarm will be
generated. This alarm threshold and the alarm type
(minor or major) can be programmed by setting
switches S1 and S2 (Figure 2) to the appropriate
positions, according to Tables 1 and 2.
The alarm thresholds are for the 15-minute registers
only, and the 15-minute ES counts are zeroed at each
15-minute boundary. The ES alarm threshold and
alarm type can also be configured in the Craft
interface Options Setup screen.
Up (open) ......................... Critical Alarm
S1-4........... S1-5 ............. HFAC Fuse Alarm Type
Down ......... Down ............ No Alarm
Up (open) .. Down............ Minor Alarm
Down ......... Up (open) ..... Major Alarm
Up (open) .. Up (open) ..... Critical Alarm
S1-6........... S1-7 ............. HTU-C Fuse alarm Type
Down ......... Down ............ No Alarm
Up (open) .. Down............ 1 or more: Critical
Down ......... Up ................ 1: Major, 2-13: Critical
Up (open) .. Up (open) ..... 1-5: Major, 6-13: Critical
Description
Selects the type of alarm generated when the errored seconds
(ES) counter exceeds the programmed threshold (see Table 2,
S2-1, S2-2).
Selects the type of alarm generated when the severely errored
seconds (SES) counter exceeds the programmed threshold (see
Table 2, SW2-3, SW2-4).
Selects the type of alarm generated when the unavailable
seconds (UAS) counter exceeds the programmed threshold (see
Table 2, SW2-5, SW2-6).
Selects the type of alarm generated in response to an HFAC fuse
failure. Switch SW3 must also be set correctly for this alarm to
function properly (see Table 3). This option is hardwareselectable only.
Selects the type of alarm generated in response to a specific
number of HTU-C fuse failures.
S1-8.................................. HCOT-CTL Fuse Alarm Type
Down ................................ Major Alarm
Up (open) ......................... Critical Alarm
Selects the type of alarm generated in response to an HCOT-CTL
system controller fuse failure. This option can only be selected
by switch.
S2-7........... S2-8 ............. COMM Link Loss Alarm
Down ......... Down ............ No Alarm
Up (open) .. Down............ Minor
Down ......... Up ................ Major
Up (open) .. Up (open) ..... Critical
Selects the threshold for generating an ES alarm. Once the number
detected exceeds the threshold, an alarm is generated as
programmed by S1-1. The alarm condition is cleared at the next 15minute boundary.
Selects the threshold monitored for generating an SES alarm.
Once the number detected exceeds the threshold, an alarm is
generated as programmed by S1-2. The alarm condition is cleared
at the next 15-minute boundary.
Selects the threshold monitored for generating an UAS alarm.
Once the number detected exceeds the threshold, an alarm is
generated as programmed by S1-3. The alarm condition is cleared
at the next 15-minute boundary.
Selects the type of alarm generated when a loss of communication
between the HFAC controller and an HTU-C occurs. This option is
switch-selectable only.
NOTE: Only one of the S3 Switches should be in the down position.
SwitchFunction
S3-1.................................. HFAC Fuse Alarm Control
Down ................................ Critical
Up..................................... No Alarm
S3-2.................................. HFAC Fuse Alarm Control
Down ................................ Major
Up..................................... No Alarm
S3-3.................................. HFAC Fuse Alarm Control
Down ................................ Minor
Up..................................... No Alarm
4
61221051L1-5, Issue 161221051L1-5A
Description
Selects Critical as the type alarm generated if the HFAC fuse
is blown.
Selects Major as the type alarm generated if the HFAC fuse
is blown.
Selects Minor as the type alarm generated if the HFAC fuse
is blown.
Errored Seconds Monitor Locations
HTU-C
ES
C-1
ES
C-2
Loop 1
Loop 2
To
Network
ES
DSX-1
Severely Errored Seconds Monitor Locations
HTU-C
SES
C-1
SES
C-2
Loop 1
Loop 2
To
Network
SES
DSX-1
Unavailable Seconds Monitor Locations
HTU-C
Loop 1
UAS
C-1
UAS
C-2
Loop 2
To
Network
UAS
DSX-1
ES
H-1
ES
H-3
SES
H-1
SES
H-3
UAS
H-1
UAS
H-3
HRE
HRE
HRE
ES
H-2
ES
H-4
SES
SES
H-4
UAS
H-2
UAS
H-4
H-2
Loop 1
Loop 2
Loop 1
Loop 2
Loop 1
Loop 2
HTU-R
ES
R-1
ES
R-2
SES
R-1
SES
R-2
UAS
R-1
UAS
R-2
HTU-R
HTU-R
ES
DS1
SES
DS1
UAS
DS1
To
Customer
To
Customer
To
Customer
Figure 4. ES, SES, and UAS Monitor Locations
Severely Errored Seconds (SES) Alarm
The locations shown in Figure 4 are monitored for
Severely Errored Seconds and counts are maintained
for each location. If any of these counts exceed the
SES programmed threshold (see Tables 1 and 2) an
alarm will be generated. This alarm threshold and the
alarm type (minor or major) can be programmed by
setting switches S1 and S2 (Figure 2) to the
appropriate positions according to Tables 1 and 2.
The alarm thresholds are for the 15-minute registers
only, and the 15-minute SES counts are zeroed at each
15-minute boundary. The SES alarm threshold and
alarm type can also be configured in the Craft
interface Options Setup screen (see Figure 11).
Unavailable Seconds (UAS) Alarm
The locations shown in Figure 4 are monitored for
unavailable seconds. Seconds and counts are
maintained for each location. If any of these counts
exceed the UAS programmed threshold (see Tables 1
and 2), an alarm will be generated. This alarm
threshold and the alarm type (major or critical) can be
programmed by setting switches S1 or S2 (Figure 2)
to the appropriate positions according to Tables 1 and
2. The alarm thresholds are for the 15-minute
registers only, and the 15-minute UAS errored second
counts are zeroed at each 15-minute boundary. The
UAS alarm threshold and alarm type can also be
configured in the Craft interface Options Setup screen
(see Figure 11). Note that HDSL2 two wire units only
have Loop 1.
HFAC Alarm Outputs
If an HFAC is present in the shelf, alarm outputs are
available on the backplane wirewrap pins
corresponding to the HFAC slot (see Figure 5).
These outputs are dry contact relay connections and
provide normally open, normally closed and common
connection points for alarm monitoring equipment.
Alarm connection points corresponding to critical
major, and minor alarms (both visible and audible) are
provided. These alarms are generated by the HFAC as
a result of processed data collected from the HTU-Cs /
H2TU-Cs.
Alarm outputs presented on these pins are
programmable and can be provisioned in the HFAC
Options Setup screen (see Options Setup screen), or
using the HFAC dip switch settings (see Tables 1, 2,
and 3). Alarm severity can be provisioned for alarms
NO: Normallly Open Position
NC: Normally Closed Position
C:Common
Figure 5. HFAC Wire-Wrap Pin-Out Design
resulting from blown fuses in the HFAC, HTU-C, or
HCOT units, or from communications failure between
any HTU-C and the HFAC. Alarm severity and
threshold value can be provisioned for the errored
second, severely errored second, and unavailable
second parameters.
Table 5. External HTU-C/HTU-R Alarm Options
(Software-Selectable Only)
(arrow indicates default setting)
Options Screen
Menu Item No.FunctionDescription
5 ...........................EXT HTU-C/R Alarms Disables and
Disabled
Enabled
enables the alarms
resulting from external
DSX-1 or DS1
HTU-C Fuse Alarm
An alarm may be generated as a result of an HTU-C
fuse failure. The HFAC controller will sense the
failure and process this alarm event according to
switch settings as defined in Table 2.
3. CONNECTIONS
The HFAC plugs into Slot 0 (labeled HFAC) of the
ADTRAN E220 shelf. Push firmly to ensure the card
seats properly. Connections to the HFAC are made by
wire wrap connections to the backplane-mounted
connector. JP1 is the primary interface connector for
the HFAC. Figure 5 shows the wire-wrap connector
terminal pin assignments.
Alarms
A set of alarm contacts is provided through backplane
wire-wrap connections (Figure 5). Wiring can be
made to the appropriate pins on JP1 for normally open
or normally closed connections for alarm conditions.
Connection is made to the Common (C) pin and to the
Normally Open (NO) or Normally Closed (NC) pin.
Visible and audible alarm contact connections are
provided for critical, major, and minor alarms. An
audible alarm cutoff function can be initiated by
pressing the ACO push-button on the HFAC, or by
providing closure between the Remote ACO pins on
the JP1 connector. The backplane is labeled with
appropriate markings for the alarm and alarm cutoff
connections.
An option available on the HFAC Option Setup screen
allows external DSX-1 or DS1 alarms to be enabled or
disabled. This option can only be changed in the
HFAC menu (no dip switch option) and the factory
default is disabled (see Table 5).
HFAC Fuse Alarm
An alarm may be generated as a result of an HFAC
fuse failure. For alarm processing to work, two sets of
switches (S1 and S3) must be programmed. See Table
1 and 4. Both switches must be set properly for the
HFAC fuse alarm to operate correctly.
6
61221051L1-5, Issue 161221051L1-5A
System Communications
If the HFAC is to be used as part of a larger system
under the control of an ADTRAN E220 HCOT-CTL
system controller, then shelf-to-shelf connections are
required. Two RJ45S jacks, JP6 and JP7, located on
the shelf backplane, provide shelf-to-shelf
communications. A 4- or 8-wire cable with RJ45S
type jacks should be used to supply these
interconnections. The sequence of connections should
be from the RS422 OUT port of the shelf containing
the E220 HCOT-CTL system controller to the RS422
IN port of the next shelf. Follow this procedure to
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