Supplementary features
Aastra 5370/Aastra 5370ip 81
eud-1281/1.3 – R3.0 – 04.2013
Line keys
This section explains the different options provided by your phone, if your sys-
tem administrator has assigned you one or more configurable keys as Line keys. 
Line keys turn your phone into a key phone.
A line has a number which can be used to make an external or internal call. One or 
usually several phones can be connected to this line, for example, in a travel agent's all 
the staff assigned to handling Europe as a travel destination. A Line key has an LED to 
indicate the line's status and lets you answer calls on that line.
If, for example, level 3 of the expansion key module Aastra M535 is activated and the 
Line key on level 1 receives a call, the call is signalled by the red blinking LED in posi-
tion 1. For more information about the Aastra M535 expansion key module, please 
refer to chapter "Using the Aastra M535 expansion key module", page 27.
You are free to choose your own Personal key.
Answering a call on a Line key
You are called on one or more Line keys. The Line key(s) flash rapidly. You want to 
answer the call on one of the Line keys.
If you first want to answer a call on a different line key, press the line key to take the 
call. If you pick up the receiver without pressing a Line key, you are connected with 
the call on the line with the highest priority.
Pick up the handset.
➔Connection with the line with the highest priority.
Or:
1 Press the Line key.
➔The line is selected.
2 Pick up the handset.
➔Connection with the selected line.
Note:
If you keep the Line key pressed down for approx. 2 seconds while it is lit, the 
caller’s phone number is displayed.