diff --git a/scenarios/incoming_peer/0003_test.yml.tt2 b/scenarios/incoming_peer/0003_test.yml.tt2
index 5c7976df..89551117 100644
--- a/scenarios/incoming_peer/0003_test.yml.tt2
+++ b/scenarios/incoming_peer/0003_test.yml.tt2
@@ -165,6 +165,6 @@ sip_out:
       'P-Callee-UUID: \w+',
       'P-Asserted-Identity: <sip:004321001@',
       'P-Called-Party-ID: <sip:testuser1003@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios/invite/0005_test.yml.tt2 b/scenarios/invite/0005_test.yml.tt2
index f9242415..641ebe01 100644
--- a/scenarios/invite/0005_test.yml.tt2
+++ b/scenarios/invite/0005_test.yml.tt2
@@ -204,6 +204,6 @@ sip_out:
       'P-Callee-UUID: [% spce_test.testuser1003.uuid %]',
       'P-Asserted-Identity: <sip:4311002@',
       'P-Called-Party-ID: <sip:testuser1003@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios/invite_allowedcli_match/0005_test.yml.tt2 b/scenarios/invite_allowedcli_match/0005_test.yml.tt2
index 2b0e6617..3c90c522 100644
--- a/scenarios/invite_allowedcli_match/0005_test.yml.tt2
+++ b/scenarios/invite_allowedcli_match/0005_test.yml.tt2
@@ -211,6 +211,6 @@ sip_out:
       'P-Callee-UUID: \w+',
       'P-Asserted-Identity: <sip:4311002@',
       'P-Called-Party-ID: <sip:testuser1003@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios/invite_allowedcli_match_alias/0005_test.yml.tt2 b/scenarios/invite_allowedcli_match_alias/0005_test.yml.tt2
index 4e5f3273..9e34ddcf 100644
--- a/scenarios/invite_allowedcli_match_alias/0005_test.yml.tt2
+++ b/scenarios/invite_allowedcli_match_alias/0005_test.yml.tt2
@@ -212,6 +212,6 @@ sip_out:
       'P-Callee-UUID: \w+',
       'P-Asserted-Identity: <sip:4311009@',
       'P-Called-Party-ID: <sip:testuser1003@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios/invite_allowedcli_nonmatch/0005_test.yml.tt2 b/scenarios/invite_allowedcli_nonmatch/0005_test.yml.tt2
index b9e34409..2905236e 100644
--- a/scenarios/invite_allowedcli_nonmatch/0005_test.yml.tt2
+++ b/scenarios/invite_allowedcli_nonmatch/0005_test.yml.tt2
@@ -212,6 +212,6 @@ sip_out:
       'P-Callee-UUID: \w+',
       'P-Asserted-Identity: <sip:4311002@',
       'P-Called-Party-ID: <sip:testuser1003@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios/invite_anonymous/0005_test.yml.tt2 b/scenarios/invite_anonymous/0005_test.yml.tt2
index 1fb799ba..439967b6 100644
--- a/scenarios/invite_anonymous/0005_test.yml.tt2
+++ b/scenarios/invite_anonymous/0005_test.yml.tt2
@@ -203,6 +203,6 @@ sip_out:
       'P-Callee-UUID: [% spce_test.testuser1003.uuid %]',
       '_:NOT:_P-Asserted-Identity: \w+',
       'P-Called-Party-ID: <sip:testuser1003@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios/invite_blockout_pinoverride/0005_test.yml.tt2 b/scenarios/invite_blockout_pinoverride/0005_test.yml.tt2
index 6b6f86f7..315fb5e8 100644
--- a/scenarios/invite_blockout_pinoverride/0005_test.yml.tt2
+++ b/scenarios/invite_blockout_pinoverride/0005_test.yml.tt2
@@ -195,6 +195,6 @@ sip_out:
       'P-Callee-UUID: \w+',
       'P-Asserted-Identity: <sip:4311002@',
       'P-Called-Party-ID: <sip:testuser1003@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios/invite_concurrent_max/0007_test.yml.tt2 b/scenarios/invite_concurrent_max/0007_test.yml.tt2
index 32f86b64..cb0e2dc3 100644
--- a/scenarios/invite_concurrent_max/0007_test.yml.tt2
+++ b/scenarios/invite_concurrent_max/0007_test.yml.tt2
@@ -214,6 +214,6 @@ sip_out:
       'P-Callee-UUID: [% spce_test.testuser1003.uuid %]',
       'P-Asserted-Identity: <sip:4311002@',
       'P-Called-Party-ID: <sip:testuser1003@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios/invite_concurrent_max_out/0003_test.yml.tt2 b/scenarios/invite_concurrent_max_out/0003_test.yml.tt2
index 6b66ca22..fddcfb9c 100644
--- a/scenarios/invite_concurrent_max_out/0003_test.yml.tt2
+++ b/scenarios/invite_concurrent_max_out/0003_test.yml.tt2
@@ -182,6 +182,6 @@ sip_out:
       'P-Callee-UUID: 0',
       'P-Asserted-Identity: <sip:4311002@',
       'P-Called-Party-ID: <sip:004321001@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios/invite_concurrent_max_out_per_account/0003_test.yml.tt2 b/scenarios/invite_concurrent_max_out_per_account/0003_test.yml.tt2
index 06292b49..546f29c5 100644
--- a/scenarios/invite_concurrent_max_out_per_account/0003_test.yml.tt2
+++ b/scenarios/invite_concurrent_max_out_per_account/0003_test.yml.tt2
@@ -180,6 +180,6 @@ sip_out:
       'P-Callee-UUID: \w+',
       'P-Asserted-Identity: <sip:4311002@',
       'P-Called-Party-ID: <sip:004321001@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios/invite_concurrent_max_per_account/0007_test.yml.tt2 b/scenarios/invite_concurrent_max_per_account/0007_test.yml.tt2
index 0351f8d9..cd21d9a0 100644
--- a/scenarios/invite_concurrent_max_per_account/0007_test.yml.tt2
+++ b/scenarios/invite_concurrent_max_per_account/0007_test.yml.tt2
@@ -215,6 +215,6 @@ sip_out:
       'P-Callee-UUID: \w+',
       'P-Asserted-Identity: <sip:4311002@',
       'P-Called-Party-ID: <sip:testuser1003@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios/invite_ignore_allowip/0005_test.yml.tt2 b/scenarios/invite_ignore_allowip/0005_test.yml.tt2
index ed038806..334abb2c 100644
--- a/scenarios/invite_ignore_allowip/0005_test.yml.tt2
+++ b/scenarios/invite_ignore_allowip/0005_test.yml.tt2
@@ -200,6 +200,6 @@ sip_out:
       'P-Callee-UUID: \w+',
       'P-Asserted-Identity: <sip:4311002@',
       'P-Called-Party-ID: <sip:testuser1003@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios/invite_lateoam/0005_test.yml.tt2 b/scenarios/invite_lateoam/0005_test.yml.tt2
index 52640bb9..49d60eae 100644
--- a/scenarios/invite_lateoam/0005_test.yml.tt2
+++ b/scenarios/invite_lateoam/0005_test.yml.tt2
@@ -204,6 +204,6 @@ sip_out:
       'P-Callee-UUID: \w+',
       'P-Asserted-Identity: <sip:4311002@',
       'P-Called-Party-ID: <sip:testuser1003@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios/invite_no_refer/0005_test.yml.tt2 b/scenarios/invite_no_refer/0005_test.yml.tt2
index d2c0ed45..517b129e 100644
--- a/scenarios/invite_no_refer/0005_test.yml.tt2
+++ b/scenarios/invite_no_refer/0005_test.yml.tt2
@@ -206,7 +206,7 @@ sip_out:
       'P-Callee-UUID: \w+',
       'P-Asserted-Identity: <sip:4311002@',
       'P-Called-Party-ID: <sip:testuser1003@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc',
       '_:NOT:_Allow: .*REFER.*'
     ]
diff --git a/scenarios/invite_peerout/0003_test.yml.tt2 b/scenarios/invite_peerout/0003_test.yml.tt2
index 1ee61698..5f757167 100644
--- a/scenarios/invite_peerout/0003_test.yml.tt2
+++ b/scenarios/invite_peerout/0003_test.yml.tt2
@@ -178,6 +178,6 @@ sip_out:
       'P-Callee-UUID: \w+',
       'P-Asserted-Identity: <sip:4311002@',
       'P-Called-Party-ID: <sip:004321001@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios/invite_peerout_rewrite/0003_test.yml.tt2 b/scenarios/invite_peerout_rewrite/0003_test.yml.tt2
index d4ef58e1..6b316110 100644
--- a/scenarios/invite_peerout_rewrite/0003_test.yml.tt2
+++ b/scenarios/invite_peerout_rewrite/0003_test.yml.tt2
@@ -194,6 +194,6 @@ sip_out:
       'P-Callee-UUID: 0',
       'P-Asserted-Identity: <sip:4311002@',
       'P-Called-Party-ID: <sip:4321001@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios/invite_peerout_rewrite_pv_regex/0003_test.yml.tt2 b/scenarios/invite_peerout_rewrite_pv_regex/0003_test.yml.tt2
index b7a84b1b..f9838c99 100644
--- a/scenarios/invite_peerout_rewrite_pv_regex/0003_test.yml.tt2
+++ b/scenarios/invite_peerout_rewrite_pv_regex/0003_test.yml.tt2
@@ -197,6 +197,6 @@ sip_out:
       'P-Callee-UUID: 0',
       'P-Asserted-Identity: <sip:1002@',
       'P-Called-Party-ID: <sip:4321001@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios/invite_retrans/0005_test.yml.tt2 b/scenarios/invite_retrans/0005_test.yml.tt2
index cd6d5948..1d29b6b8 100644
--- a/scenarios/invite_retrans/0005_test.yml.tt2
+++ b/scenarios/invite_retrans/0005_test.yml.tt2
@@ -196,6 +196,6 @@ sip_out:
       'P-Callee-UUID: [% spce_test.testuser1003.uuid %]',
       'P-Asserted-Identity: <sip:4311002@',
       'P-Called-Party-ID: <sip:testuser1003@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios/invite_tcp_udp/0005_test.yml.tt2 b/scenarios/invite_tcp_udp/0005_test.yml.tt2
index 8d0f547b..cfab7cd0 100644
--- a/scenarios/invite_tcp_udp/0005_test.yml.tt2
+++ b/scenarios/invite_tcp_udp/0005_test.yml.tt2
@@ -206,6 +206,6 @@ sip_out:
       'P-Callee-UUID: [% spce_test.testuser1003.uuid %]',
       'P-Asserted-Identity: <sip:4311002@',
       'P-Called-Party-ID: <sip:testuser1003@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios/invite_tcp_udp_reinvite/0005_test.yml.tt2 b/scenarios/invite_tcp_udp_reinvite/0005_test.yml.tt2
index d1ff7e5e..9922e36f 100644
--- a/scenarios/invite_tcp_udp_reinvite/0005_test.yml.tt2
+++ b/scenarios/invite_tcp_udp_reinvite/0005_test.yml.tt2
@@ -206,6 +206,6 @@ sip_out:
       'P-Callee-UUID: [% spce_test.testuser1003.uuid %]',
       'P-Asserted-Identity: <sip:4311002@',
       'P-Called-Party-ID: <sip:testuser1003@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios_lnp/incoming_peer/0003_test.yml.tt2 b/scenarios_lnp/incoming_peer/0003_test.yml.tt2
index f09cbcbd..f04025b0 100644
--- a/scenarios_lnp/incoming_peer/0003_test.yml.tt2
+++ b/scenarios_lnp/incoming_peer/0003_test.yml.tt2
@@ -185,6 +185,6 @@ sip_out:
       'P-Callee-UUID: 0',
       'P-Asserted-Identity: <sip:004321001@',
       'P-Called-Party-ID: <sip:4318881003@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios_lnp/invite/0003_test.yml.tt2 b/scenarios_lnp/invite/0003_test.yml.tt2
index fbc4f5d8..a0e24aa8 100644
--- a/scenarios_lnp/invite/0003_test.yml.tt2
+++ b/scenarios_lnp/invite/0003_test.yml.tt2
@@ -232,6 +232,6 @@ sip_out:
       'P-Callee-UUID: [% spce_test.testuser1001.uuid %]',
       'P-Asserted-Identity: <sip:4311002@',
       'P-Called-Party-ID: <sip:4318881001@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios_lnp/invite_ncos_black/0011_test.yml.tt2 b/scenarios_lnp/invite_ncos_black/0011_test.yml.tt2
index 9095035f..282e7877 100644
--- a/scenarios_lnp/invite_ncos_black/0011_test.yml.tt2
+++ b/scenarios_lnp/invite_ncos_black/0011_test.yml.tt2
@@ -195,7 +195,7 @@ sip_out:
       'P-Callee-UUID: 0',
       'P-Asserted-Identity: <sip:4311002@spce.test>',
       'P-Called-Party-ID: <sip:43999300@127.0.2.1>',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc',
       'P-NGCP-Caller-Info: <sip:testuser1002@spce.test>;ip=127.126.0.3;port=\d+',
       'P-NGCP-Callee-Info: <sip:43999300@spce.test>;ip=127.0.2.1;port=\d+',
diff --git a/scenarios_lnp/invite_ncos_white/0003_test.yml.tt2 b/scenarios_lnp/invite_ncos_white/0003_test.yml.tt2
index 7077023b..0ed55fac 100644
--- a/scenarios_lnp/invite_ncos_white/0003_test.yml.tt2
+++ b/scenarios_lnp/invite_ncos_white/0003_test.yml.tt2
@@ -182,6 +182,6 @@ sip_out:
       'P-Callee-UUID: 0',
       'P-Asserted-Identity: <sip:4311002@',
       'P-Called-Party-ID: <sip:43999100@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios_lnp/invite_ncos_white/0012_test.yml.tt2 b/scenarios_lnp/invite_ncos_white/0012_test.yml.tt2
index c472f980..bae12efd 100644
--- a/scenarios_lnp/invite_ncos_white/0012_test.yml.tt2
+++ b/scenarios_lnp/invite_ncos_white/0012_test.yml.tt2
@@ -188,6 +188,6 @@ sip_out:
       'P-Callee-UUID: 0',
       'P-Asserted-Identity: <sip:4311002@',
       'P-Called-Party-ID: <sip:4318881001@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios_lnp/invite_peerout/0003_test.yml.tt2 b/scenarios_lnp/invite_peerout/0003_test.yml.tt2
index ff3b7337..1fdaf510 100644
--- a/scenarios_lnp/invite_peerout/0003_test.yml.tt2
+++ b/scenarios_lnp/invite_peerout/0003_test.yml.tt2
@@ -208,6 +208,6 @@ sip_out:
       'P-Callee-UUID: 0',
       'P-Asserted-Identity: <sip:4311002@',
       'P-Called-Party-ID: <sip:0043test28881001;npdi@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios_lnp/invite_peerout_rn/0003_test.yml.tt2 b/scenarios_lnp/invite_peerout_rn/0003_test.yml.tt2
index 16287424..b2d2b4dc 100644
--- a/scenarios_lnp/invite_peerout_rn/0003_test.yml.tt2
+++ b/scenarios_lnp/invite_peerout_rn/0003_test.yml.tt2
@@ -193,6 +193,6 @@ sip_out:
       'P-Callee-UUID: 0',
       'P-Asserted-Identity: <sip:4311002@',
       'P-Called-Party-ID: <sip:004321001;npdi;rn=004328881001@',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios_pbx/invite/0005_test.yml.tt2 b/scenarios_pbx/invite/0005_test.yml.tt2
index de96777f..687536a4 100644
--- a/scenarios_pbx/invite/0005_test.yml.tt2
+++ b/scenarios_pbx/invite/0005_test.yml.tt2
@@ -162,6 +162,6 @@ sip_out:
       'P-NGCP-Lookup-Type: ext',
       'P-NGCP-Orig-User: 43110021003',
       'P-NGCP-Orig-Dialed: 1003',
-      'P-App-Param: ;aleg_sst_enable=no;sst_enable=no;a_park_domain=\d+;b_park_domain=\d+',
+      'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no;a_park_domain=\d+;b_park_domain=\d+',
       'P-App-Name: sbc'
     ]
diff --git a/scenarios_pbx/invite/0007_test.yml.tt2 b/scenarios_pbx/invite/0007_test.yml.tt2
index efa6ee12..b6bde0e0 100644
--- a/scenarios_pbx/invite/0007_test.yml.tt2
+++ b/scenarios_pbx/invite/0007_test.yml.tt2
@@ -159,7 +159,7 @@ sip_out:
        'P-Callee-UUID: [% spce_test.testuser1003.uuid %]',
        'P-Asserted-Identity: <sip:4311002@',
        'P-Called-Party-ID: <sip:testuser1003@',
-       'P-App-Param: ;aleg_sst_enable=no;sst_enable=no',
+       'P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no',
        'P-App-Name: sbc',
        'P-NGCP-Caller-Info: <sip:testuser1002@',
        'P-NGCP-Callee-Info: <sip:43110021003@',