Stuck Calls

Question 1

Stuck Call

Answer 1

Information about a call being released(Switch) in the communications system fails to reach one or more components of the CTI Solutions. Possible cause is the CTI application and device temporary loss communication. CTI continue to treat the call as active due to missing this information.

Question 2

Detection of Stuck Calls

Answer 2

v7.1 and 8+ is Automatic through T-Sever Options

Question 3

Deletion of Stuck Calls

Answer 3

v7.1 and 8+ can do manually or automatic it via T-Sever Options, SNMP Interface, and Management Layer Script

Question 4

T-Server Switch Specific Functionality

Answer 4

Offers simple stuck call timeout based detection and deletion built in the T-Server. Setup for individual T-Server only through CME and does not have automatic reaction when stuck calls are detected since it does not make use of Management Layer.

Question 5

SNMP Interface

Answer 5

The method relies on SNMP aware application to monitor and detect stuck calls in T-server that require SNMP license. It is customizable and can be manage multiple T-server but does not use Management Layer to monitor and respond to alarm events.

Question 6

Management Layer Script

Answer 6

Highly customizable and Integrated with the Management Layer that can be configured and reacted upon to stuck calls event when SCS receives the corresponding logs. Does not need a license and generated a XML file that summarizes the call from T-server.

Question 7

Notify-Idle-Tout

Answer 7

Option in call-clean up section in T-server that tells how long for it to wait for a update from the last one on a call before its consider as a stick call.

Question 8

Cleanup-Idle-Tout

Answer 8

Option in call-clean up section in T-server that clears up a call if no updates is received from the last one. It either deletes the call information from memory or querying the switch(Through CTI if viable). Value for this option must be longer than the maximum call duration.

Question 9

Periodic-Idle-Tout

Answer 9

Time interval for periodic checks for stuck calls by the T-Server checking its own information regarding the call currently available in the switch. Does not verify if other options are expired.

Question 10

SNMP Interface Method

Answer 10

Filters calls based on creation time and last update. It make uses of two tables tsCallInfoTable and tsCallFilterTable. Calls are release by their ConnID

Question 11

gstuckcalls

Answer 11

CML Utility included with SCS that connects with T-server via the management ports. It can retrieve active/stuck or clear stuck calls including removing any with a specific ConnID.

Question 12

gstuckcalls command parameters

Answer 12

./gstuckcalls -h -p -a -ca -f

./gstuckcalls -h -p -a -cb -c

Question 13

Before v 7.1

Answer 13

detection and deletion were done manually and had to recreate DN, manual change state through softphone, and restart T-server.