| Product Desciption: |
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- The E&Mtrunk card interfaces four analog telephone trunks to the Meridian 1 switch.
- Each trunk interface connects to a trunk facility using tip and ring leads that carry voice, ringing, and tone signaling, and to signaling interfaces by E&M leads.
- Each unit can be configured independently by software control in the Trunk Administration program (LD 14).
- Intelligent Peripheral Equipment (IPE) device that can be installed in either the NT8D37 IPEModule or the NT8D11 CE/PEModule.
- The E&M trunk card supports the following types of trunks: 2-wire E&M Type I signaling trunks. 4-wire E&M trunks: Type I or Type II signaling, Duplex (DX) signaling. Paging (PAG) trunks. Type I signaling utilizes two signaling wires plus ground. Type II and DX signaling utilizes two pairs of signaling wires.
- Most electronic switching systems use Type II signaling.
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