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- [6] OPERATION AND MAINTENANCE FACILITIES IN THE SPC PABX SYSTEM ASB 900. AIAA Paper, 1600, : 449 - 453
- [7] ADMINISTRATIVE FUNCTIONS FOR A STORED PROGRAM CONTROL PABX ELECTRICAL COMMUNICATION, 1978, 53 (03): : 198 - 202
- [9] EBX8000 STORED-PROGRAM CONTROL PABX POST OFFICE ELECTRICAL ENGINEERS JOURNAL, 1981, 74 (JUL): : 134 - 137
- [10] EBX8000 STORED-PROGRAM CONTROL PABX. Post Office Electrical Engineers Journal, 1981, 74 (pt 2): : 134 - 137