AT&T 7400 series Software ⎜ Network Type S75/G1 S85/G2 Package, Pec, Dcs, Software Capabilities

2-4COMMUNICATION SYSTEM NETWORKING — AN OVERVIEW

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The networking software has been packaged to accommodate this type of network evolution. Table 2-1shows the types of software (and their PECs) that must be activated to enable particular types of networks.

		Table 2-1.Networking Software
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⎜	⎜			Software					⎜
⎜	⎜								⎜
⎜	⎜				⎜				⎜
⎜ Network Type	⎜								⎜
⎜	⎜	S75/G1			⎜	S85/G2			⎜
					⎜
⎜	⎜								⎜
					⎜
⎜	⎜		⎜				⎜		⎜
					⎜
⎜	⎜	Package	⎜	PEC		Package	⎜	PEC	⎜
					⎜
⎜	⎜		⎜				⎜		⎜
					⎜
⎜	⎜		⎜				⎜		⎜
		Basic		1233-VAS	⎜ Basic			1252-RS5
⎜ Tandem Tie Trunk	⎜		⎜				⎜		⎜
⎜	⎜ ARS		⎜	1233-ARS	⎜	(includes ARS)	⎜		⎜
⎜	⎜		⎜		⎜		⎜		⎜
					⎜
⎜ MS/T	⎜	Uniform Dial Plan	⎜	1233-UDP			⎜	1252-MP3	⎜
					⎜ Multipremises
⎜	⎜		⎜		⎜		⎜		⎜
⎜	⎜		⎜				⎜		⎜
					⎜
⎜ ETN	⎜ Private Network Access		⎜	1233-PNA		ETN (Standard Network)	⎜ 1252-ET3		⎜
					⎜
⎜	⎜		⎜		⎜		⎜		⎜
⎜	⎜		⎜				⎜		⎜
		DCS		1233-DCS	⎜ DCS			1252-DCS
⎜ DCS	⎜								⎜
⎜	⎜		⎜		⎜		⎜		⎜

For ETNs, the ETN (Standard Network) or Private Network Access (PNA) packages need be activated only on the tandem switches. (The ETN [Standard Network] or PNA packages can also be activated in main switches; these are known as intelligent mains.)

SOFTWARE CAPABILITIES

System 75/Generic 1 and DIMENSION/System 85/Generic 2 software packages are equivalent in that they enable the same type of networks; they are different in the they sometimes use different processes to produce the same result. Below is an explanation of the networking software, along with System 75/Generic 1 and DIMENSION/System 85/Generic 2 software similarities and differences.

Basic Networking Software

The basic software for the DIMENSION, System 85, and Generic 2 communication systems contains three capabilities around which networks are built:

∙Automatic Route Selection (ARS). ARS is the feature that provides routing of public network calls. The feature provides automatic selection from an ordered list of trunk groups and access to the first- available trunk group in the list. The ordered list of trunk groups is called a routing pattern; the trunk groups on the list are called preferences. Up to 254 routing patterns can be established on the System 75 or Generic 1 communications system; on the System 85 or Generic 2, 64 patterns can be made available. Each ARS routing pattern has a first-choice preference and one or more alternate preferences arranged in order of desirability (usually, cheapest to most expensive). For public network calls, ARS provides capabilities similar to those provided by Automatic Alternate Routing (AAR) for private