FreeCalypso > hg > ice1-trau-tester

annotate README @ 51:db39e8855f3d

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ater: implement play-d144
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 25 Sep 2024 05:53:38 +0000
parents 12415d7ce262
children
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Mychaela Falconia <falcon@freecalypso.org>
parents: 13
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1 The test programs in this Hg repository are intended to run on a Raspberry Pi 5
f7a1a2765e21 README: update for current state
Mychaela Falconia <falcon@freecalypso.org>
parents: 13
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2 driving an icE1usb adapter, which is in turn connected to Nokia TCSM2
f7a1a2765e21 README: update for current state
Mychaela Falconia <falcon@freecalypso.org>
parents: 13
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3 bank-of-TRAUs apparatus via PCM and Ater interfaces. Both E1 ports on icE1usb
f7a1a2765e21 README: update for current state
Mychaela Falconia <falcon@freecalypso.org>
parents: 13
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4 have to be used (one E1 circuit for PCM, the other for Ater), and RPi5 has to
f7a1a2765e21 README: update for current state
Mychaela Falconia <falcon@freecalypso.org>
parents: 13
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5 be used as the driving host because it is one of the few host machine types
f7a1a2765e21 README: update for current state
Mychaela Falconia <falcon@freecalypso.org>
parents: 13
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6 that can successfully operate icE1usb with both E1 interfaces.
f7a1a2765e21 README: update for current state
Mychaela Falconia <falcon@freecalypso.org>
parents: 13
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f7a1a2765e21 README: update for current state
Mychaela Falconia <falcon@freecalypso.org>
parents: 13
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8 The test programs in the present suite use Osmocom libraries and work through
f7a1a2765e21 README: update for current state
Mychaela Falconia <falcon@freecalypso.org>
parents: 13
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9 osmo-e1d, opening individual E1 timeslots as needed. The test programs are:
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f7a1a2765e21 README: update for current state
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parents: 13
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11 * itt-ater-16 operates on a single E1 ts on Ater and treats it as consisting of
f7a1a2765e21 README: update for current state
Mychaela Falconia <falcon@freecalypso.org>
parents: 13
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12 four 16 kbit/s subslots, corresponding to PCM circuit type A on TCSM2. Each
f7a1a2765e21 README: update for current state
Mychaela Falconia <falcon@freecalypso.org>
parents: 13
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13 individual TRAU channel comes to life when TRAU-UL frames appear in the
f7a1a2765e21 README: update for current state
Mychaela Falconia <falcon@freecalypso.org>
parents: 13
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14 corresponding subslot on Ater, thus itt-ater-16 can activate up to 4 TRAU
f7a1a2765e21 README: update for current state
Mychaela Falconia <falcon@freecalypso.org>
parents: 13
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15 channels that share the same E1 ts. For each channel it activates, our test
f7a1a2765e21 README: update for current state
Mychaela Falconia <falcon@freecalypso.org>
parents: 13
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16 program can feed any desired UL frame stream to the TRAU, thereby facilitating
f7a1a2765e21 README: update for current state
Mychaela Falconia <falcon@freecalypso.org>
parents: 13
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17 functional experimentation.
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parents: 13
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19 * itt-ater-8 is the 8 kbit/s submultiplexing counterpart to itt-ater-16,
12415d7ce262 README: document itt-ater-8
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
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20 corresponding to PCM circuit type B on TCSM2.
12415d7ce262 README: document itt-ater-8
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parents: 38
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f7a1a2765e21 README: update for current state
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parents: 13
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22 * itt-pcm-one operates on a single E1 ts on A interface, aka PCM. It can
f7a1a2765e21 README: update for current state
Mychaela Falconia <falcon@freecalypso.org>
parents: 13
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23 display and record PCM output from the TRAU, and it can feed different PCM
f7a1a2765e21 README: update for current state
Mychaela Falconia <falcon@freecalypso.org>
parents: 13
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24 byte patterns to the TRAU.
f7a1a2765e21 README: update for current state
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parents: 13
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parents: 13
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26 * itt-pcm-br (PCM bridge) opens two different E1 timeslots on the PCM side of
f7a1a2765e21 README: update for current state
Mychaela Falconia <falcon@freecalypso.org>
parents: 13
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27 the TRAU apparatus and bridges them together, forwarding all bytes from A to
f7a1a2765e21 README: update for current state
Mychaela Falconia <falcon@freecalypso.org>
parents: 13
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28 B and from B to A. This bridging function is needed in order to exercise TFO,
f7a1a2765e21 README: update for current state
Mychaela Falconia <falcon@freecalypso.org>
parents: 13
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29 involving two TRAU channels in the TCSM2 bank-of-TRAUs apparatus.