THE INDUSTRIAL RECOGANIZATIONS ACT
550 A series of manual cord switchboards with a capacity of 10 trunks and 30 stations. 551 A jack and plug ... Offers a modern appearance and operating features for customers who require manual PBX service or switchboard facilities tor dial PBX systems. ... 1970 29 Works with the 558A manual PBX system. 1972- 73anbsp;...
| Title | : | THE INDUSTRIAL RECOGANIZATIONS ACT |
| Author | : | |
| Publisher | : | - 1974 |
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