Nortel Networks 1000 - Manual (Page 140)

140 NT1R20 Off-Premise Station Analog Line card
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
• individual circuits on the NT1R20 OPS Analog Line Card can also be
configured as On-Premise Station (ONS) ports in LD 10:
— 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
The operating range and built-in protection provisions of the OPS
analog line card make it suitable for applications that are variants on the
traditional configuration shown in
Figure 24 "Traditional OPS application
configuration" (page 138) . Examples of such applications include:
• 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, such as a fax machine
• individual circuits on the OPS analog line card can also be configured
as ONS ports in LD 10:
— ONS service with hazardous and surge voltage protection (not
available on other Meridian 1 analog line cards)
— to use otherwise idle 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 24 "Traditional OPS application configuration" (page 138) . The
following provides basic transmission planning guidelines for various OPS
applications.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.