Example #1A ESS Input Messages
ALT-START
ID . . . . . . ALT-START
GENERIC. . . . B12 and later
TTY. . . . . . MTCE, ALIT
FEATURE. . . . CORE
APPLICATION. . 1A
PPU. . . . . .
TYPE . . . . . Input
1. PURPOSE
Starts Automatic Line Insulation Tests (ALITs) at a specified directory
number, Line Remote Equipment Number (LREN), or Line Equipment Number
(LEN); or tests a single directory number, LREN, or LEN.
2. FORMAT
ALT-START- a b c ddd dddd dddd.
3. EXPLANATION OF MESSAGE
The test results are printed on the input teletypewriter via the AL01
output message. If the request is for a sequential test, the plant
service center TTY will always receive a copy. Fields 'a', 'b', and 'c'
are not entirely independent; see Table A.
Note: Example of input required to perform the Tip and Ring Ground
(TRG) test on DN 682-2973, using the 0 to 2.5 MEG resistance range;
range 'c', assuming the office is provided for the high option:
ALT-START-DTC6822973****.
a = Control action code:
= S - Start sequential Directory Number (DN) testing at the
DN specified by the 11-character 'd' code.
= P - Start sequential Private Branch eXchange (PBX) DN
testing at the PBX DN plus extension number specified by
the 11-character 'd' code.
= A - Start sequential Automatic Call Distribution (ACD) DN
testing at the ACD DN specified by the 11-character 'd'
code. This field is available when feature package ACD
is loaded.
= D - Test the single DN or PBX DN plus extension number
specified by the 11-character 'd' code.
= L - Test the single LEN specified by the 11-character 'd'
code. (In offices involved in a cutover, this request
must not be used if the specified LEN is marked as precut
inactive or postcut inactive. It will result in the
cutoffs being closed.)
= X - Start sequential LEN testing at the LEN specified by
the 11-character 'd' code.
= T - Test the single LREN specified by the 11-character 'd'
code.
Note: This field is available whenever the RSS feature package is
loaded.
= R - Start sequential LREN testing at the LREN specified by
the 11-character 'd' code, i.e., test the specified LREN
and all higher LRENs in the specified RSS (first two
digits of LREN). (See Note above).
b = Type of test:
= S - Short circuit and ring ground test.
= T - Tip and ring ground test.
= F - Foreign potential tip and ring test.
= G - General test (all of the above).
= C - Contactor test.
c = Letter (A through D) used to specify one of four
resistance ranges within a group of ranges (see Table B).
One of three groups (high, medium, or low) is selected by
the cross-connect strapping on the line insulation test
circuit. (See SD-1A141 for cross-connection information.)
For Remote Switching System (RSS) offices, the RL ALIT
field in the RSS common block specifies the high, medium,
or low resistance group.
= E - If field 'b' = C (contactor test). (See Table B).
TABLE A
ALLOWABLE COMBINATION TABLE
FIELD 'a' FIELD 'b' FIELD 'c'
S,P,A,D,L,X,T,R STGF ABCD
C E
TABLE B
CROSS-CONNECT GROUP SPECIFIED RESISTANCE RANGES
HIGH MEDIUM LOW
a = 0 - 320K 0 - 80,000 0 - 80,000
B = 0 - 1.25 MEG 0 - 320K 0 - 160K
C = 0 - 2.5 MEG 0 - 1.25 MEG 0 - 640K
D = 0 - 5 MEG 0 - 5 MEG 0 - 2.5 MEG
E = 0 - 640k (always used for contactor testing)
d = An 11-digit field used to specify a DN, a PBX DN plus X
number, LEN or LREN. The digits entered must be left-
adjusted in the field and unused positions must be filled
with asterisks. The field is interpreted in one of the
following four ways:
1234567**** - 7-digit DN followed by four
asterisks used with 'a' = S, A, or D.
12345678*** - 8-digit LEN followed by three
asterisks used with 'a' = L or X.
12345671234 - 7-digit DN followed by 4-digit
extension number used with 'a' = D or P.
1234567**** - 7-digit, LREN followed by four
asterisks used with 'a' = R or T.
4. SYSTEM RESPONSE
NG = Indicates that an invalid letter combination has been
entered, an incorrect number of digits has been specified
for a given control action, or indicates that a DN will
not result in an intraoffice DN when converted from BCD
to binary.
NO = Indicates that a test is in progress and another test has
already been queued, or a sequential test has been
requested while another sequential test is in progress.
PF = Indicates that the message has been received; AL01 output
message follows.
5. REFERENCES - FOR MORE DETAILS SEE
PIDENT
PR-6A852, ALIT1A00
Practice
231-090-052, Feature Document - Automatic Line Insulation Test Failure