Libosmo-abis » History » Version 5
fixeria, 09/25/2018 06:55 PM
| 1 | 1 | laforge | h1. libosmo-abis |
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| 2 | 3 | laforge | |
| 3 | 4 | fixeria | {{>toc}} |
| 4 | 3 | laforge | |
| 5 | 5 | fixeria | This is a library containing common/shared code regarding the A-bis interface between BTS and BSC. |
| 6 | It implements drivers for mISDN and DAHDI based E1 cards, as well as some A-bis/IP dialects. |
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| 7 | 1 | laforge | |
| 8 | 5 | fixeria | The library source code can be found in: |
| 9 | 1 | laforge | |
| 10 | 3 | laforge | <pre> |
| 11 | git clone git://git.osmocom.org/libosmo-abis.git |
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| 12 | 1 | laforge | </pre> |
| 13 | 3 | laforge | |
| 14 | h2. Input Drivers |
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| 15 | 2 | laforge | |
| 16 | There are currently the following input drivers available: |
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| 17 | |||
| 18 | 3 | laforge | h3. misdn |
| 19 | 1 | laforge | |
| 20 | 3 | laforge | This input driver supports the mISDN code as it is present in mainline linux-2.6 kernels. |
| 21 | |||
| 22 | 1 | laforge | It uses the in-kernel LAPD implementation, and is thus bound to some restrictions. Specifically, |
| 23 | 5 | fixeria | you can only have one signalling timeslot (D-channel) in every E1 line, which may cause problems |
| 24 | 2 | laforge | with multi-BTS or multi-TRX setups (particularly in the case of Nokia A-bis) |
| 25 | 1 | laforge | |
| 26 | 5 | fixeria | You have to configure which E1 timeslot is to be used for signalling by module parameters, e.g. |
| 27 | |||
| 28 | 3 | laforge | <pre> |
| 29 | 1 | laforge | modprobe hfcmulti dslot=1 |
| 30 | 3 | laforge | </pre> |
| 31 | 2 | laforge | |
| 32 | 5 | fixeria | will configure TS1 as signalling. |
| 33 | 1 | laforge | |
| 34 | 3 | laforge | h3. misdn_lapd |
| 35 | |||
| 36 | 1 | laforge | This input driver supports the mISDN code as it is present in mainline linux-2.6 kernels. |
| 37 | However, unlike the "misdn" driver, it runs LAPD in userspace, as part of libosmo-abis. |
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| 38 | |||
| 39 | 2 | laforge | In order to be able to use it, you will need to make sure the mISDN kernel driver does not |
| 40 | 5 | fixeria | configure any timeslot to signalling, e.g. |
| 41 | |||
| 42 | 1 | laforge | <pre> |
| 43 | 2 | laforge | modprobe hfcmulti dslot=-1 |
| 44 | 1 | laforge | </pre> |
| 45 | 3 | laforge | |
| 46 | 5 | fixeria | (notice the "-" in front of 1 to indicate "no signalling timeslot"). |
| 47 | 2 | laforge | |
| 48 | h3. dahdi |
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| 49 | |||
| 50 | 3 | laforge | This driver supports the DAHDI (formerly known as zaptel) out-of-tree drivers for e.g. |
| 51 | the various Digium and Digium compatible E1/T1/J1 cards. |
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| 52 | |||
| 53 | 2 | laforge | h3. ipa |
| 54 | |||
| 55 | 3 | laforge | This implements the ip.access A-bis/IP multiplex protocol. |
| 56 | |||
| 57 | h3. hsl |
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| 58 | 2 | laforge | |
| 59 | Experimental driver for support of the [HSL_Femto] |
