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  1. FelixKS

    Nortel Phone System 4 x 16 NT7B58AAAN with Trunk Cartridge NT7B75GE-93

    Curly Thanks for your reply!!! Yes we tested line volume with AT&T and got confirmation landlines were okay. Let's work with tech guy based on your recommendation. Thanks a lot.
  2. FelixKS

    Nortel Phone System 4 x 16 NT7B58AAAN with Trunk Cartridge NT7B75GE-93

    We moved and reinstalled Nortel phone system but voice sound was too low. We changed phone and line and also rebooting several times. Still problem. One tech guy checked our phone system. He recommend to replace Trunk Cartridge NT7B75GE-93. Please let me know if this recommendation make sense to...

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