# Notification service

Alongside system phones, most analogue phones have a message LED. The LED is activated if for example there is an internal callback or a new voice mail voice message waiting for the guest. If the guest answers using his phone's preconfigured answer key, a call is triggered or he is connected with the voice mail system so he can listen to his voice message.

Table 1. Notification service: Function
Functions | Function codes
Answer notification | *#38

Parent topic: Function codes and services
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