Hardware Manual
Page 25
... line telephones: ❥ The total Ringer Equivalence Number (REN) per system cannot exceed 10. ❥ The total REN per analog port cannot exceed 5. ❥ Ringer Equivalence is cumulative. ❥ A REN of the common equipment, extensions, the telco demarcation... enough space for physical damage. Figure 1: Installation Layout, DSX-40 (page 20) and shows you to comfortably work. and provides enough room for you about a component's function, review Components (page 1). Many phones with electromechanical ringer. Contact your equipment lists. Installation Installation ...
... line telephones: ❥ The total Ringer Equivalence Number (REN) per system cannot exceed 10. ❥ The total REN per analog port cannot exceed 5. ❥ Ringer Equivalence is cumulative. ❥ A REN of the common equipment, extensions, the telco demarcation... enough space for physical damage. Figure 1: Installation Layout, DSX-40 (page 20) and shows you to comfortably work. and provides enough room for you about a component's function, review Components (page 1). Many phones with electromechanical ringer. Contact your equipment lists. Installation Installation ...