Nortel DMS-100 Metallic Test Access Horizontal Connection Table (MTAHORIZ) |
Table Name
Metallic Test Access Horizontal Connection Table
Functional Description of Table MTAHORIZ
Table MTAHORIZ lists the assignment of horizontal agents, Line Test Units (LTU), Metallic (or multi-line) Test Units (MTU), operator verification, Metallic Jacks (MJACK), incoming test access trunks, extended Metallic Test Access (MTA) and short circuits to a horizontal connection, and horizontal group of Metallic Test Access Minibars (MTAM).
Different horizontal agents can use the same horizontal connection, but are associated with different MTAMs and horizontal groups. A maximum of 160 different horizontal agents are permitted for a given horizontal connection.
A maximum limit of 32 MTAMs can be multiplied (grouped) to connect to a single horizontal agent. A horizontal agent can be used only once.
Line test units for the host and remote locations are assigned to pseudo Common Language Location Identifier (CLLI) code LTU.
Metallic (or multi-line) test units for the host and remote locations are assigned to pseudo CLLI code MTU.
Operator verification trunks for the host switching unit are assigned to the pseudo CLLI code VER90.
The CLLI codes for operator verification trunk groups for remote locations are assigned by the operating company.
Metallic jacks are assigned to pseudo CLLI code MJACK.
The CLLIs for incoming test access trunks for the host and remote locations are assigned by the operating company.
The assignment rules for table MTAHORIZ are as follows:
For the assignment of the LTUs, incoming test access and operator verification trunks to trunk group, trunk subgroup and trunk member tables, see tables TRKGRP (Trunk Group), TRKSGRP (Trunk Subgroup), and TRKMEM (Trunk Member) respectively.
A LTU, MTU, or both must be entered in table TRKMEM before being added to table MTAHORIZ. If the LTU or MTU is deleted from the TRKMEM table, the corresponding tuple in table MTAHORIZ is marked as deleted, but is automatically restored if the LTU or MTU is re-added to table TRKMEM.
Large MTA Configuration
A large MTA configuration is used if the vertical connections that are required to connect to the NOTEST trunk through the MTA exceed the MTAHORIZ limitation of 32 MTA drivers. The NOTEST trunk is placed on an Extended Metallic Trunk Access (EMTA), and the EMTA capability of connecting to Line Concentrating Device (LCD) vertical connections is used as shown in the following figures.
Figure 1 shows how the LCD group MTA drivers and the EMTA connections and MTA drivers connect.

Figure 1: LCD Connections to EMTA
If there are a large number of test access trunks, the previous solution could result in a large number of MTA drivers needed for the EMTA configuration. The number of MTA drivers for the EMTA can be reduced by breaking it into groups also, as shown in Figure 2.

Figure 2: MTA Driver Reduction Through Grouping
For related information, refer to table MTAMDRVE (Metallic Test Access Minibar Driver).
Datafill Sequence and Implications
The following tables must be datafilled before table MTAHORIZ:
Table MTAHORIZ interacts with office parameter CABLE_SHORT_TIMEOUT in table OFCENG (timed short circuit [field SELECTOR set to S]).
Table Size
Memory for this table is dynamically allocated up to a maximum of 2,000 tuples.
Datafill
The following table lists datafill for table MTAHORIZ.
----------------------------------------------------------------------------------------------
Table MTAHORIZ Field Descriptions
Field Subfield Entry Explanation and Action
----------------------------------------------------------------------------------------------
HORIZ 0 to 127 Metallic Test Access Horizontal Connection
Enter the Metallic Test Access (MTA) horizontal
connection to which the test equipment
(horizontal agent) is connected.
----------------------------------------------------------------------------------------------
HORIZGRP 0 to 159 Metallic Test Access Horizontal Group
Enter the horizontal group number which
identifies the horizontal connection and its
horizontal agent as a unique tuple. The
horizontal group is used to assign different
test equipment (horizontal agents) on the same
MTA horizontal. A horizontal group can involve
only one horizontal agent, but is cross-connected
(multipled) at the Main Distribution Frame (MDF)
to a single or a number of MTA Minibar (MTAM)
driver horizontal connections.
----------------------------------------------------------------------------------------------
HORIZAGT See Subfield Horizontal Agent
This field consists of subfield SELECTOR.
SELECTOR B, BBT, E, J, Selector
L, LA, MJ, If the assignment is for a board-to-board
NT1, S, T dedicated horizontal connection, enter "B"
and datafill refinement BBTNR, section
"SELECTOR = B".
If the assignment is for the MTA horizontal
connections on a Board-to-Board Testing (BBT)
unit, enter "BBT" and datafill refinement BBTNR.
If the assignment is to multiple a horizontal
connection of a minibar switch from a host or
remote connection to the vertical of a host
minibar switch, enter "E" (extension of MTA)
and datafill refinement EMTAVERT, section
"SELECTOR = E".
If a metallic connection to the tip and ring of
the subscriber line is required, enter "MJ" and
datafill refinements CLLI and MJACKNUM, in
section "SELECTOR = MJ".
Selector values J and LA are for licensee use
only.
If the assignment is for a Line Test Unit (LTU)
or Metallic (or multi-line) Test Unit (MTU),
enter "L" and datafill refinements CLLI, EXTRKNM,
and ALTUSE in section "SELECTOR = L".
If the assignment is for a test NT1, enter "NT1"
and complete refinement NT1NUM in section
"SELECTOR = NT1".
If the assignment is for a timed short circuit
(and the time is defined by the office parameter
CABLE_SHORT_TIMEOUT in table OFCENG), enter "S".
No refinements require datafill. Go to field
MTAGRP in section
"SELECTOR = B, BBT, E, LA, MJ, S, T".
If the assignment is for an incoming test access
or operator verification trunk, enter "T" and
datafill refinements CLLI and EXTRKNM in section
"SELECTOR = T".
----------------------------------------------------------------------------------------------
-End-
SELECTOR = B
If the entry in field SELECTOR is B, datafill refinement BBTNR as described below.
----------------------------------------------------------------------------------------------
SELECTOR = B Field Descriptions
Field Subfield Entry Explanation and Action
----------------------------------------------------------------------------------------------
BBTNR 0 to 7 Board-to-Board Testing Number
Enter the number of the board-to-board set with
which this horizontal connection is associated.
Go to field MTAGRP in section
"SELECTOR = B, BBT, E, LA, MJ, S, T".
----------------------------------------------------------------------------------------------
-End-
SELECTOR = BBT
If the entry in field SELECTOR is BBT, datafill refinement BBTNR as described below.
----------------------------------------------------------------------------------------------
SELECTOR = BBT Field Descriptions
Field Subfield Entry Explanation and Action
----------------------------------------------------------------------------------------------
BBTNR 0 to 7 Board-to-Board Testing Number
Enter the number of the board-to-board set with
which this horizontal connection is associated.
CLLI_NAME Alphanumeric Common Language Location Identifier
This subfield specifies the CLLI name of the
BBT outgoing trunk.
EXTRKNM 0 to 9,999 External Trunk Number
This subfield specifies the external trunk
number assigned in table TRKMEM to the BBT
outgoing trunk.
PREDIAL_DELAY 0 to 300 Predial Delay
This subfield specifies the time in hundreds
of milliseconds between sending an off-hook
by the DMS switch on the no-test trunk to the
old office and outpulsing of digits on that
trunk. For example, an input of "2" gives a
delay of 200 milliseconds.
SDMEM 0 to 511 Signal Distribution Member
This subfield specifies the group number
associated with the primary Signal
Distribution (SD) circuit of a NT2X57 card
connected to this BBT test unit previously
datafilled in table SDGRP (Signal Distributor
Group)
SCMEM 0 to 511 Scan Detector Member
This subfield specifies the group number
associated with the primary SC circuit of
a NT0X10 card connected to this BBT test
unit previously datafilled in table SCGRP
(Scan Group).
DISC_RELAY A, K Disc Relay
This subfield specifies the relay in the
NT5X73AB BBT test unit which, when operated,
disconnects the BBT test unit from the old
office. The default is the "A" relay.
DISC_TIME 1 to 300 Disc Time
This subfield specifies the time in 100
millisecond increments required for the old
office to properly release once a disconnect
signal has been received from the DMS switch.
OFFICE TYPE SxS, XBAR, Office Type
ESS, DMS, This subfield specifies the information required
and OTHER by the BBT software to communicate with the old
office. The old offices are categorized as SxS,
XBAR, ESS, DMS, and OTHER.
OPTIMIZE_ Y or N Optimized Outpulsing
OUTPULSING This subfield specifies if the old office uses
optimized outpulsing. This subfield is displayed
only for SxS offices.
DIGSOUT 0 to 18 Digit Number
This subfield specifies the number of digits that
must be outpulsed by the DMS switch to connect to
a line in the old office.
AT_HOST YES or NO At Host
This subfield specifies if the ABBT test unit
is located at the host site.
RELAY_DELAY 0 to 100 Relay Delay
This subfield specifies the time in 100
millisecond increments for a signal output from
a SD point of the host DMS switch to travel to
the BBT test unit located at a remote site and
operate a relay in the BBT test unit. For
example, an input of "2" specifies a delay of
200 milliseconds. The prompt appears only if
the BBT test unit is located at a remote site
(AT HOST=NO).
SCAN_DELAY 0 to 10 Scan Delay
This subfield specifies the time in 100
millisecond increments for a signal generated
by an ABBT test unit located at a remote site
to travel to a SCAN point of the host DMS switch
and be read. For example, an input of "2"
specifies a delay of 200 milliseconds.
The prompt appears only if the ABBT test unit is
located at a remote site (AT HOST=NO).
VERT 0 to 639 Vertical
This subfield is the starting vertical number
on the MTA driver.
NBRVERTS 0 to 640 Number Verticals
This subfield is the number of verticals for
the MTA driver.
Go to field MTAGRP in section
"SELECTOR = B, BBT, E, LA, MJ, S, T".
---------------------------------------------------------------------------------------------
-End-
SELECTOR = E
If the entry in field SELECTOR is E, datafill refinement EMTAVERT as described below.
----------------------------------------------------------------------------------------------
SELECTOR = E Field Descriptions
Field Subfield Entry Explanation and Action
----------------------------------------------------------------------------------------------
EMTAVERT 0 to 1,023 Extended Metallic Test Access Column
Enter the associated vertical connection on
the MTA in the host to which the horizontal
connection is connected.
Go to field MTAGRP in section
"SELECTOR = B, BBT, E, LA, MJ, S, T".
---------------------------------------------------------------------------------------------
-End-
SELECTOR = L
If the entry in field SELECTOR is L, datafill refinements CLLI, EXTRKNM, and ALTUSE as described below.
----------------------------------------------------------------------------------------------
SELECTOR = L Field Descriptions
Field Subfield Entry Explanation and Action
----------------------------------------------------------------------------------------------
CLLI LTU or MTU Common Language Location Identifier
If the assignment is for a LTU, enter the pseudo
CLLI code LTU.
If the assignment is for a MTU, enter the pseudo
CLLI code "MTU".
The pseudo CLLI codes must be previously entered
in table CLLI.
EXTRKNM 0 to 9,999 External Trunk Number
Enter the external trunk trunk number assigned in
table TRKMEM to the LTU or MTU.
ALTUSE Y or N Automatic Line Test Use
Enter "Y" (yes) to use the line test equipment for
automatic line testing. Otherwise, enter "N" (no).
Go to field MTAGRP in section
"SELECTOR = B, BBT, E, LA, MJ, S, T".
---------------------------------------------------------------------------------------------
-End-
SELECTOR = MJ
If the entry in field SELECTOR is MJ, datafill refinements CLLI and MJACKNUM as described below.
----------------------------------------------------------------------------------------------
SELECTOR = MJ Field Descriptions
Field Subfield Entry Explanation and Action
----------------------------------------------------------------------------------------------
CLLI MJACK Common Language Location Identifier
If the assignment is for a metallic jack, enter
the pseudo CLLI code MJACK. The pseudo CLLI code
must be previously entered in table CLLI.
MJACKNUM 1 to 256 Metallic Jack Number
Enter the metallic jack number.
Note: The vertical connection to which the
horizontal connection is being extended, must be
previously datafilled as an EMTA vertical connection
in table MTAVERT.
Go to field MTAGRP on section
"SELECTOR = B, BBT, E, LA, MJ, S, T".
---------------------------------------------------------------------------------------------
-End-
SELECTOR = NT1
If the entry in field SELECTOR is NT1, datafill refinement NT1NUM as described below.
----------------------------------------------------------------------------------------------
SELECTOR = NT1 Field Descriptions
Field Subfield Entry Explanation and Action
----------------------------------------------------------------------------------------------
NT1NUM 0 to 255 Network Termination 1 Number
Enter the number of the test Network Termination
1 (NT1) in the DMS testing system with which this
horizontal connection is associated.
Go to field MTAGRP in section
"SELECTOR = B, BBT, E, LA, MJ, S, T".
---------------------------------------------------------------------------------------------
-End-
SELECTOR = T
If the entry in field SELECTOR is T, datafill refinements CLLI and EXTRKNM as described below.
----------------------------------------------------------------------------------------------
SELECTOR = T Field Descriptions
Field Subfield Entry Explanation and Action
----------------------------------------------------------------------------------------------
CLLI Alphanumeric Common Language Location Identifier
(up to 16 If the assignment is for the host operator
characters) or verification trunk, enter the pseudo CLLI code
VER90 "VER90".
If the assignment is for an operator verification
trunk for a remote location, or an incoming test
access trunk, enter the pseudo CLLI code
previously datafilled in table CLLI. The pseudo
CLLI codes must also be entered in table CLLI.
EXTRKNM 0 to 9,999 External Trunk Number
Enter the external trunk number assigned in table
TRKMEM to the operator verification trunk or the
incoming test access trunk.
Go to field MTAGRP in section
"SELECTOR = B, BBT, E, LA, MJ, S, T".
---------------------------------------------------------------------------------------------
-End-
SELECTOR = B, BBT, E, LA, MJ, S, T
If the entry in field SELECTOR is B, BBT, E, LA, MJ, S, or T, datafill field MTAGRP as described below.
----------------------------------------------------------------------------------------------
SELECTOR = B, BBT, E, LA, MJ, S, T Field Descriptions
Field Subfield Entry Explanation and Action
----------------------------------------------------------------------------------------------
MTAGRP See Subfields Metallic Test Access Group
This field consists of a list of MTA drivers that
multiple to the test equipment and is a vector of
up to 32 multiples of subfields MTAMEM and HORIZ.
If less than 32 multiples are required, end the
list with a "$" (dollar sign).
MTAMEM 0 to 511 Metallic Test Access Minibar Driver Member
Enter the Metallic Test Access Minibar (MTAM)
driver member number to which the horizontal
connection is connected.
HORIZ 0 to 127 Horizontal
This read-only field gives information about the
MTA drivers physical horizontal connection.
Enter "0" (zero) to satisfy table control.
Any entry outside the range indicated for this
field is invalid.
---------------------------------------------------------------------------------------------
-End-
Datafill Example
The following example MAP display shows sample datafill for table MTAHORIZ.
The example shows an addition to table MTAHORIZ. The value in field HORIZ is entered which is part of the vector of field MTAGRP. After the values have been input, a display of the table shows the actual horizontal connection on the physical driver.
HORIZ HORIZGRP HORIZAGT MTAGRP ______________________________________________________________________________ 3 159 BBT 0 BBTOUT 0 8 0 0 A 12 DMS Y 7 YES 24 4 (6 3) $ |