| Parent directory/ | - | - |
| retronetcall-12-eng-Nokia_TCSM2_a_bank_of_TRAUs_with_E1_interfaces_Part_2_the_working_state_opus.opus | 33.8 MiB | 2025-03-01 08:25:22 |
| retronetcall-11-eng-Classic_PCM30_with_channel-associated_signaling_opus.opus | 27.7 MiB | 2025-03-01 08:11:59 |
| retronetcall-10-eng-Nokia_TCSM2_a_bank_of_TRAUs_with_E1_interfaces_Part_1_initial_examination_of_the_hardware_opus.opus | 48.0 MiB | 2024-08-09 23:01:53 |
| retronetcall-9-eng-Group_4_Facsimile_Service_Fax_G4_opus.opus | 44.7 MiB | 2024-08-09 21:02:22 |
| retronetcall-8-eng-A_tour_of_DIVF_our_OCTOI_central_office_using_yate_dahdi-trunkdev_and_more_opus.opus | 53.1 MiB | 2024-01-24 20:46:57 |
| retronetcall-7-eng-Teletext_A_digital_medium_transcending_a_factor_of_10_in_technical_progress_opus.opus | 31.4 MiB | 2023-07-07 10:43:11 |
| retronetcall-6-eng-Teletex_The_brief_abandoned_step_between_Telex_and_Telefax_opus.opus | 35.0 MiB | 2023-06-11 11:24:15 |
| retronetcall-5-eng-E1_The_analog_side_part_1_opus.opus | 47.3 MiB | 2023-05-05 07:51:03 |
| retronetcall-4-eng-Introduction_to_the_X21_interface_opus.opus | 34.9 MiB | 2023-03-04 16:13:51 |
| retronetcall-3-eng-Datex-L_The_German_CSPDN_Circuit_Switched_Public_Data_Network_opus.opus | 37.8 MiB | 2023-02-02 13:19:56 |
| retronetcall-2-eng-ISDN_B-Channel_protocols_X75_V120_V110_T70_opus.opus | 37.9 MiB | 2022-12-25 00:23:36 |
| retronetcall-1-eng-OCTOI_project_status_update_Nov_2022_opus.opus | 31.9 MiB | 2022-12-25 00:19:03 |