AT&T 518-455-317 manual Hardware Considerations, Maximum Lines

Hardware Considerations

Programming procedures use line and extension numbers. The line number represents the line jack on a 206 or 400 module to which the outside line is connected. Similarly, the extension number represents the extension jack on a 206 module to which the system phone or standard device is connected.

For each 206 module, the system assigns two lines and six extensions; for each 400 module, the system assigns four lines. The system numbers lines and extensions consecutively. Figure 2-1 shows the numbering scheme for a system with maximum lines. Figure 2-2 shows the numbering scheme for a system with maximum extensions. However, your system can have any number of lines and extensions up to the maximum.

206 Modules	400 Modules
Line	Line
Jacks	Jacks

Extension	Line
Jacks	Jacks

Figure 2-1. Maximum Lines

206 Modules	206 Modules
Line	Line
Jacks	Jacks

Extension	Extension
Jacks
	Jacks

Figure 2-2. Maximum Extensions

2-2Programming