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retronetcall-12-eng-Nokia_TCSM2_a_bank_of_TRAUs_with_E1_interfaces_Part_2_the_working_state_mp3.mp358.1 MiB2025-Mar-01 09:24
retronetcall-11-eng-Classic_PCM30_with_channel-associated_signaling_mp3.mp343.2 MiB2025-Mar-01 09:13
retronetcall-10-eng-Nokia_TCSM2_a_bank_of_TRAUs_with_E1_interfaces_Part_1_initial_examination_of_the_hardware_mp3.mp366.3 MiB2024-Aug-10 00:02
retronetcall-9-eng-Group_4_Facsimile_Service_Fax_G4_mp3.mp354.0 MiB2024-Aug-09 22:10
retronetcall-8-eng-A_tour_of_DIVF_our_OCTOI_central_office_using_yate_dahdi-trunkdev_and_more_mp3.mp365.4 MiB2024-Jan-24 21:47
retronetcall-7-eng-Teletext_A_digital_medium_transcending_a_factor_of_10_in_technical_progress_mp3.mp343.1 MiB2023-Jul-07 11:42
retronetcall-6-eng-Teletex_The_brief_abandoned_step_between_Telex_and_Telefax_mp3.mp344.1 MiB2023-Jun-11 12:24
retronetcall-5-eng-E1_The_analog_side_part_1_mp3.mp361.9 MiB2023-May-05 08:48
retronetcall-4-eng-Introduction_to_the_X21_interface_mp3.mp345.2 MiB2023-Mar-04 17:13
retronetcall-3-eng-Datex-L_The_German_CSPDN_Circuit_Switched_Public_Data_Network_mp3.mp348.5 MiB2023-Feb-02 14:20
retronetcall-2-eng-ISDN_B-Channel_protocols_X75_V120_V110_T70_mp3.mp359.0 MiB2022-Dec-25 01:24
retronetcall-1-eng-OCTOI_project_status_update_Nov_2022_mp3.mp348.7 MiB2022-Dec-25 01:17