Install libosmoabis5 by entering the following commands in the terminal:
sudo apt update sudo apt install libosmoabis5
GSM A-bis handling
This library contains common/shared code regarding the A-bis interface between the GSM Base transceiver station (BTS) and the GSM Base station controller BSC. . It also implements drivers for mISDN and DAHDI based E1 cards, as well as some A-bis/IP dialects.