Nortel Networks 553-3001-211 manual Other applications, Transmission considerations

NT1R20 Off-Premise Station Analog Line card Page 177 of 894

Other applications

The operating range and built-in protection provisions of the NT1R20 OPS analog line card make it suitable for applications which are variants on the traditional configuration shown in Figure 25 on page 176. Examples of such applications are:

•a PBX in a central building serving stations in other buildings in the vicinity, such as in an industrial park, often called a campus environment. Facilities can be provided by the local exchange carrier or can be privately owned. Protection could be required.

•termination to other than a telephone set, such as to a fax machine or a key telephone system.

•individual circuits on the NT1R20 OPS analog line card can also be configured as On-Premise Station (ONS) ports in LD 10:

—to have ONS service with hazardous and surge voltage protection (not available on other analog line cards)

—to use otherwise idle NT1R20 OPS analog line card ports

Transmission considerations

The transmission performance of OPS lines depends on the following factors:

•the port-to-port loss for connections between OPS ports and other ports

•the transmission parameters of the facilities between the OPS port and the off-premise station or termination

•the electrical and acoustic transmission characteristics of the termination

These factors must be considered when planning applications using the NT1R20 OPS analog line card. They are important when considering configurations other than the traditional OPS application as shown in Figure 25 on page 176. The following provides basic transmission planning guidelines for various OPS applications.

Circuit Card Description and Installation