It all depends on the elevator code where the elevator is located. I usually do dedicated line, the phone dials a monitoring company. Even made it an extension on a PBX once that would ring all other extensions. Customer felt that that was the fastest way to get help.

-Hal

CALIFORNIA PROPOSITION 65 WARNING: Some comments made by me are known to the State of California to cause irreversible brain damage and serious mental disorders leading to confinement.