Mitel sip 5340 User Manual

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5320/5330/5340 IP Phone SIP User and Administrator Guide 
 
29 
Shared Lines and Keys 
There are three types of shared lines: 
•  SIP:  basic shared line with limited features (supports call forking but does not have LED 
activity and lines are not linked. This type of shared line is available in normal SIP mode). 
•  SIP_BLA line type: server-enhanced Sylantro Bridged Line Appearance line type 
•  SIP_SCA line type: server-enhanced Broadworks Shared Call Appearance line type 
BLA and SCA line types allow calls and lines to be shared by multiple users. A SIP server 
provides support for call presentation to multiple phones, call state notifications, and access 
control. SIP mode shared lines are shared among users but, normally, only the user who initiates 
activity on the line has full control over it. For example, if a shared line is in use (not on Hold), and 
secondary share users press their corresponding line button, the shared line will not change 
state. If the shared line is Ringing, or on Hold, any share user who presses the corresponding line 
button will change the state of that call and get connected to the calling/held party. An exception 
to this scenario occurs when the server is configured to allow line seizure by multiple lines. Mitel 
SIP phones support multi-call server programming. 
Requirements for making calls and picking up held calls from shared lines are the same as for 
normal (non-shared) lines. 
 
Shared Lines and Keys Programming Requirements 
Before programming the Shared Lines and Keys, the Broadsoft server must be configured with a 
list of shared users. 
The diagram below shows an example of how Mitel Users 1 – 3 have been configured on the 
Broadsoft server to communicate with 3 Mitel phones. The three lines used on these phones are 
shared lines; if a call is directed to User 1 then all three phones are alerted. If User 3 answers the 
call then Line 1 on Phone 1 and Line 2 on Phone 2 indicate an active line.