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Covid-19 & Returns: Due to Covid-19, certain manufacturers we carry are no longer accepting returns on their products until further notice and they are only offering replacements if an item is not working. Please feel free to contact us via phone or email to confirm the return policy on any item you might be interested in before purchasing on our website.
- Provides 4 analog extension ports (used for on-premise analog phones, fax machines and analog modems)
- The 4SLIU-S in not rated for OPX use
- Can only be expanded with the 0891049 Daughter Board
- 4 extensions status LEDs
- Maximum 2 per system
- Works in the NEC Aspire "S" telephone system only
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