Nortel Networks BCM 1000 manual Trunk types Description, Analog trunk types

86Appendix G Market profile attributes

Table 33 Analog and digital trunk types and descriptions (Sheet 2 of 2)

Trunk types	Description
DPNSS	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.

Analog trunk types:

Loop start

Standard PSTN telephone line.

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