

Here is another description of the various test numbers in use around the area codes phrequently phreaked by phine phoney phellows and phelines.

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1.             General

1.01      This directory provides test line numbers used for operational and transmission trunk testing in class 5 offices that are equipped with test lines.

2.             Acronyms and Abbreviations

2.01      Following are the acronyms and abbreviations used in this instruction:
     ATMS -- Automatic Transmission Measuring System
     BAL  -- Balance
     CLLI -- Common Language Location Identification
     HZ   -- Hertz
     MW   -- Milliwatt
     NPA  -- Numbering Plan Area
     RSB  -- Repair Service Bureau
     STC  -- Serving Test Center
     SUPV -- Supervisor or Supervision
     SNYC -- Synchronous
     TND  -- Test Number Directory
     TP0  -- Test Pad, Value 0
     TP2  -- Test Pad, Value 2 dB
     TP9  -- Test Pad, Value 9 dB

     Designation    Equipment Type
     -----------    --------------
          AES       Automatic Electric System
          DMS       Digital Multiplex Switcher
          DV        Digital Vidar
          4AT       No. 4A Toll Crossbar
          1EAX      Automatic Electric System (Electronic)
          1ES       No. 1 Electronic Switching System
          2ES       No. 2 Electronic Switching System
          3ES       No. 3 Electronic Switching Sysem
          4ES       No. 4 Electronic Switching System
          4MT       No. 4 Toll Crossbar
          KEL       Kellogg
          NE        North Electric
          NEC       Nippon Electric Corporation
          PAN       Panel
          RSS       Remote Switching System
          SXS       Step-By-Step(use SXS for 355 and 355A type)
          TSPS      Traffic Service Positions System
          1XB       No. 1 Crossbar
          3XB       No. 3 Crossbar
          25X       No. 5 Crossbar, 2-wire
          45X       No. 5 Crossbar, 4-wire
          XBT       Crossbar Tandem
          XY        Stromberg Carlson

3.             Description of Test Lines

3.01      "Test Line" and "Test Termination" are terms sometimes used interchangebly to designate a testing equipment, facility, circuit or testing communicaiton channel.  These include simple passive terminations and relatively complex testing circuits capable of applying marginal signaling tests, transmission tests, and recognizing and replying to specific signals received.

3.02      Trunk test lines return off-hook (answered) supervision. This permits measurements to be made in the normal "in-service" (talk) condition.

3.03      Test lines are adjusted to provide correct level and impedance as measured at their actual switch appearance.

3.04      Test lines are reached by dialing a customer-type telephone number when testing toward a class 5 office.

3.05      Class 5 office test lines are arranged to trip machine ringing and may furnish timed disconnect features when joint-holding and/or in-band signaling is used.  Line equipment is arranged for terminating service only.

3.06      Following is a description of the various test lines:
     A)   100-types L or T - provide a termination equivalent to the
          office switching impedance and is used for balance and noise
          test.  A typical sequence after seizure is:
               -- Off-hook supervision
               -- 175 millisecond delay
               -- 5.5 second burst of 1000 Hz tone
               -- 5.5 second termination
               -- 1 second interval of on-hook supervision
               -- termination with off-hook supervision until
                  released by calling end.
          Earlier versions are not equipped with timed test tone and
          may return repetitive 1 second intervals of on-hook every
          10 seconds until released.

     B)   AC short and AC open termination - used to test the
          stability of trunks with negative impedance repeaters.
          These test lines:
               -- Trip ringing
               -- Return off-hook supervision
               -- Provide essentially an AC short circuit and an
                  AC open circuit respectively.  They may be equipped
                  with repetitive disconnect features.

     C)   102-type - provides connection to a 1004 Hz power source
          (milliwatt) required for one-way transmission testing.
          Typical features are:
               -- Off-hook supervision
               -- 175 millisecond delay
               -- 1004 Hz at reference level
               -- 1 second interval of on-hook supervision, without
                  tone.  Every 10 seconds until released.
               -- Idle circuit termination during on-hook


          Fixed pads (TP2, TP9) and pad switching signals are included
          in the test line, when required, to furnish proper reference
          level at the switch.

     D)   Synchronous type - enable automatic and manual testing of
          the signaling and supervisor features of trunks not equipped
          to recognize ring forward signals.
               1)   After ringing signal and pretripping test, a 1.3
               second synchronizing pulse (off-hook signal) is sent.
               This synchronizes the automatic progression test equip-
               ment in the originating office with the test line.
               2)   The synchronizing pulse is followed by three 0.2
               second intervals of off-hook.  During the off-hook
               periods, soak current is applied; during the on-hook
               periods an open circuit is presented to the supervisory
               relays.
               3)   A third series of signals may be provided to test
               transfer features of centrex offices.
               4)   Results of tests are as follows:
                    -- 0.3 second bursts of audible ringing at 0.2
                       second intervals indicate that the trunk
                       tripping feature operated on the pretripping
                       test, or
                    -- a tick-tone at 120 IPM, without flash,indicates
                       that all tests are completed.
     E)   Nonsynchronous type - after ringing signal and tripping of
          ringing tests are made, flashing supervisory signals are
          sent.  A typical sequence is:
               -- 1.0 or 1.5 seconds off-hook
               -- 0.5 second on-hook
               -- 1.0 or 1.5 second off-hook
               -- 0.2 second on-hook
               -- 0.3 second off-hook
               -- Repeats of 0.2 second on-hook and 0.3 second
                  off-hook until released.  Low tone is generally
                  applied during off-hook periods.
          In offices also equipped with a synchronous test line, the
          nonsynchronous test line may:
               -- Trip ringing, and
               -- Return alternate 0.5 second off-hook and on-hook
                  signals with low tone applied during the off-hook
                  periods, until released.
     F)   105-types L or T - provide access to a far end automatic
          transmission measuring system (ATMS) responder.  Two-way
          transmission, noise and gain-slope measurements may be made
          between the far end responder and a near end responder under
          control of automatically or manually directed test equip-
          ment.  Gain-slope measurements are made  at 404, 1004 and
          2804 Hz at a transmitting level of -16dBM.  Early type
          responders may not be equipped with this feature.

     G)   106-type - Loop-Around test lines permit manual two way
          transmission measurements without far end assistance.
          Two test line numbers are required for access in class
          5 offices.
               -- Port A, seized alone, provides the functions of a
                  102-type test line.
               -- Port B, seized alone, provides the functions of a
                  100-type test line.
               -- Ports A and B, seized sequentially, enables the
                  loop-around feature.
               1)   Trunk A is directed to Port A and a far-near
               measurement is made and recorded.  With port A held,
               trunk B is directed to port B.  This loops the far end
               transmission paths of ports A and B.
               2)   A reference tone is transmitted near-far over
               trunk B and measured as far-near over trunk A.  The
               first recorded measurement subtracted from the second
               measurement indicates the near-far loss of trunk B.
               3)   Early versions may not be equipped with reference
               tone, and the initial far-near measurement must first
               be ascertained from a 102-type test line.  Also, some
               early versions do not trip ringing on Port A until Port
               B is seized.
          NOTE:  All loop-around test lines should be equipped with
                 60A control units.

     H)   107-type - provides an automatically generated progression
          of test signals.  The durations and sequence is as follows:
               1)   P/AR (Peak to Average Ratio) signal: 15 seconds
               2)   1004 Hz at -16dBM: 10 seconds
               3)   404  Hz at -16dBM: 10 seconds
               4)   2804 Hz at -16dBM: 10 seconds
               5)   Termination (balance): 20 seconds
               6)   1004 Hz at -16dBM: 7.5 minutes
               7)   Terminations: 3 seconds
               8)   Repeats steps (6) and (7) until released by
                    calling end.


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This description contained a little additional information about the
subject of Test Numbers. The main items were the acronyms and abbreviations plus the switching equpiment designations.  The
equipment type ID is very useful because with different types of switches, you can do different things--IF YOU KNOW HOW!!!!!!

However, not all test number lists include equipment IDS, but most of them do.  Hope you phreaky phellows and phelines phind this info of use.  Phreak it up, but be careful-it's getting nasty out there!!!
