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Circuit Card Description and Installation
following the grounding connection requirements as described in System
installation (553-3001-210). This requirement includes connecting the
ground for the protection devices to the approved building earth ground
reference. Any variances to these grounding requirements could limit the
functionality of the protection device.
Line and telephone components
Because testing of the line protectors was limited to the line cards and
telephones shown below, only these components should be used for
off-premise installations.
Telephones
• Meridian Modular Telephones (digital)
• Meridian Digital Telephones
• Standard analog (500/2500-type) telephones
Line cards
• NT1R20 Off-Premise Station Line card
• NT8D02 Digital Line card
• NT8D03 Analog Line card
• NT8D09 Analog Line card with Message Waiting
Trunk cards
The following trunk cards are designed using the IPE architecture, and are
recommended for use in all new system designs.