Libosmo-abis » History » Revision 4
Revision 3 (laforge, 02/19/2016 10:48 PM) → Revision 4/12 (fixeria, 09/25/2018 06:50 PM)
{{>toc}} h1. libosmo-abis {{>toc}} This is a library containing common/shared code regarding the A-bis interface between BTS and BSC It implements drivers for mISDN and DAHDI based E1 cards, as well as some A-bis/IP dialects The library source code can be found in <pre> git clone git://git.osmocom.org/libosmo-abis.git </pre> h2. Input Drivers There are currently the following input drivers available: h3. misdn This input driver supports the mISDN code as it is present in mainline linux-2.6 kernels. It uses the in-kernel LAPD implementation, and is thus bound to some restrictions. Specifically, you can only have one signaling timeslot (D-channel) in every E1 line, which may cause problems with multi-BTS or multi-TRX setups (particularly in the case of Nokia A-bis) You have to configure which E1 timeslot is to be used for signaling by module parameters, e.g. <pre> modprobe hfcmulti dslot=1 </pre> will configure TS1 as signaling. h3. misdn_lapd This input driver supports the mISDN code as it is present in mainline linux-2.6 kernels. However, unlike the "misdn" driver, it runs LAPD in userspace, as part of libosmo-abis. In order to be able to use it, you will need to make sure the mISDN kernel driver does not configure any timeslot to signaling, e.g. bh <pre> modprobe hfcmulti dslot=-1 </pre> (notice the "-" in front of 1 to indicate "no signaling timeslot"). h3. dahdi This driver supports the DAHDI (formerly known as zaptel) out-of-tree drivers for e.g. the various Digium and Digium compatible E1/T1/J1 cards. h3. ipa This implements the ip.access A-bis/IP multiplex protocol. h3. hsl Experimental driver for support of the [HSL_Femto]
