Nortel BCM200 Installation And Maintenance Manual page 380

380 Appendix H Market profile attributes
Table 111 Analog and digital trunk types and descriptions (Sheet 2 of 2)
Trunk types
DPNSS
Analog trunk types:
Loop start
N0060612 N0060612
A digital private network signaling system, which allows phone systems from different
manufacturers to be tied together over E1 lines, offering significant enhancements to BCM
networking capabilities.
DPNSS makes it easier to support centralized network functionality within private networks
for operators and attendants dealing with large numbers of calls. Its routing capabilities
provide more of the larger-network capabilities without the expense of installing a new
system, reconfiguring all the nodes, and worrying about a lot of downtime. Most functionality
over DPNSS lines is transparent once the DPNSS is programmed into the system.
DPNSS allows a local node, acting as a terminating node, to communicate with other PBXs
over the network using E1 lines. For example, corporate offices separated geographically
can be linked over DPNSS lines to other BCM systems, bypassing the restrictions of the
PSTNs to which they may be connected. This allows connected BCM systems to function
like a private network.
Standard PSTN telephone line.
Description