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Microphone expandability - Optional extension microphones increase coverage for larger size rooms (see Expansion Microphone accessory below)
Caller can choose between two languages
the called extension user just lifts the handset
This card provides circuits for 4 Single Line Telephones (hence the SLT)
Panasonic DBS 576 VB-44510 Loop Start Trunk Card (8x0) (Refurbished) Southwestern Bell Microphone expandability - Optional extensionMore Information: Panasonic DBS 576 Loop Start Card, part # VB44510 Supports up to 8 loop start CO lines and can be installed in any flexible slot. Also provides lightning arresters and UL1459 safety circuitry, and can be directly connected to CO lines.
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