CSD » History » Version 3
fixeria, 01/25/2024 11:01 PM
add support state and limitations
| 1 | 1 | fixeria | h1. CSD (Circuit Switched Data) |
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| 3 | {{>toc}} |
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| 4 | |||
| 5 | This page documents Circuit Switched Data support in the [[mobile]] application (see #4396). |
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| 6 | 2 | fixeria | |
| 7 | h2. L1 PHY support |
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| 8 | |||
| 9 | At the time of writing this wiki page, CSD support is implemented for the following L1 PHYs: |
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| 10 | |||
| 11 | * [[Layer1bin]] firmware for [[Phones#TI-Calypso-based|Calypso based phones]] |
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| 12 | * SDR PHY ([[osmotrx:|osmo-trx-ms]]) + [[TRX_Interface#The-trxcon-application|trxcon]] application |
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| 13 | * SDR PHY ([[osmocom-bb-sdr-phy:|grgsm_trx]]) + [[TRX_Interface#The-trxcon-application|trxcon]] application |
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| 14 | * [[FakeTRX]] (virtual Um) + [[TRX_Interface#The-trxcon-application|trxcon]] application |
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| 15 | 3 | fixeria | |
| 16 | h2. L23 support state |
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| 17 | |||
| 18 | * async (soft-UART) transparent V.110 calls |
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| 19 | * [not tested] sync transparent V.110 calls |
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| 20 | ** [not tested] including fax calls |
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| 21 | * TCH/F9.4, TCH/F4.8, TCH/F2.4 (only @ 2400 bps) |
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| 22 | * [not tested] TCH/H4.8, TCH/H2.4 (only @ 2400 bps) |
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| 23 | |||
| 24 | h3. TODO/limitations |
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| 25 | |||
| 26 | * non-transparent calls (V.110 RLP, V.120) |
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| 27 | * TCH/F14.4 (see also #6167) |
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| 28 | * TCH/F2.4 and TCH/H2.4 @ 300 bps, 1200/75 bps |
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| 29 | * ECSD (multi-TCH support) |
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| 30 | * "CUSE (Character devices in user space)":https://lwn.net/Articles/308445/ |
