diff --git a/resources/templates/provision/yealink/t28p/{$mac}.cfg b/resources/templates/provision/yealink/t28p/{$mac}.cfg
index 1831ba1255..7f9f2d4050 100644
--- a/resources/templates/provision/yealink/t28p/{$mac}.cfg
+++ b/resources/templates/provision/yealink/t28p/{$mac}.cfg
@@ -467,7 +467,11 @@ account.2.srtp_encryption =
 account.2.ptime =
 
 #Assign account 2 as shared line; 0-Disabled (default), 1-BSFT shared line, 2-Draft bridge line appearance;
-account.2.shared_line =
+{if isset($shared_line_2) }
+account.2.shared_line = {$shared_line_2}
+{else}
+account.2.shared_line = 0
+{/if}
 
 #Configure BLA number for account 2 and the subscribe period (in seconds). It ranges from 60 to 7200, the default value is 300.
 account.2.bla_number =
@@ -785,7 +789,11 @@ account.3.srtp_encryption =
 account.3.ptime =
 
 #Assign account 3 as shared line; 0-Disabled (default), 1-BSFT shared line, 2-Draft bridge line appearance;
-account.3.shared_line =
+{if isset($shared_line_3) }
+account.3.shared_line = {$shared_line_3}
+{else}
+account.3.shared_line = 0
+{/if}
 
 #Configure BLA number for account 3 and the subscribe period (in seconds). It ranges from 60 to 7200, the default value is 300.
 account.3.bla_number =
@@ -1102,7 +1110,11 @@ account.4.srtp_encryption =
 account.4.ptime =
 
 #Assign account 4 as shared line; 0-Disabled (default), 1-BSFT shared line, 2-Draft bridge line appearance;
-account.4.shared_line =
+{if isset($shared_line_4) }
+account.4.shared_line = {$shared_line_4}
+{else}
+account.4.shared_line = 0
+{/if}
 
 #Configure BLA number for account 4 and the subscribe period (in seconds). It ranges from 60 to 7200, the default value is 300.
 account.4.bla_number =
@@ -1422,7 +1434,11 @@ account.5.srtp_encryption =
 account.5.ptime =
 
 #Assign account 5 as shared line; 0-Disabled (default), 1-BSFT shared line, 2-Draft bridge line appearance;
-account.5.shared_line =
+{if isset($shared_line_5) }
+account.5.shared_line = {$shared_line_5}
+{else}
+account.5.shared_line = 0
+{/if}
 
 #Configure BLA number for account 5 and the subscribe period (in seconds). It ranges from 60 to 7200, the default value is 300.
 account.5.bla_number =
@@ -1737,7 +1753,11 @@ account.6.srtp_encryption =
 account.6.ptime =
 
 #Assign account 6 as shared line; 0-Disabled (default), 1-BSFT shared line, 2-Draft bridge line appearance;
-account.6.shared_line =
+{if isset($shared_line_6) }
+account.6.shared_line = {$shared_line_6}
+{else}
+account.6.shared_line = 0
+{/if}
 
 #Configure BLA number for account 6 and the subscribe period (in seconds). It ranges from 60 to 7200, the default value is 300.
 account.6.bla_number =