
2.1Before Operating the Telephones
2.1.2 For ISDN Extension Users
ISDN extensions include ISDN terminal equipment such as telephones, facsimiles or personal computers connected to the ISDN (BRI) port (port 2 and port 3) on the main unit
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| To Central Office | |||||||
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| Network | ||||||||||
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| Termination |
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ISDN Extensions
• A primary and a secondary Class of Service (COS) can be assigned per port.
28 | Operation |