Symptom: This article describes how to map an SS7 Channel Identification Code (CIC) to a Dialogic network device or CT Bus timeslot. The information contained in this article is applicable to Dialogic® Distributed Signaling Interface (DSI) SS7 Boards and is operating system agnostic. An application developer needs to map SS7 CIC values to Dialogic network devices and/or CT Bus Time Slots in order to use the Dialogic® Global Call SS7 API. Fix / Solution: SS7 signaling messages use the CIC to identify the trunk channel that contains the audio for the call. The Dialogic® Media API uses network identifiers and CT Bus timeslots to take action on a call. In the reference application, call audio is recorded using the network transmit timeslots of the called and calling party. Therefore, the application developer needs to provide a mapping between the Dialogic network devices and the CIC information received for a call. This is how to establish the mapping: 1. Install and configure both the Dialogic® Media Boards and the Dialogic® DSI SS7 Boards so they both appear in the Dialogic® Configuration Manager (DCM) and can be stopped and started using the DCM. 2. Run an application such as the gc_basic_call_model demonstration program. This will create an ss7.log file in the directory the application was run from. 3. Use the ss7trace utility, found in the dialogic\bin directory, to translate the ss7.log into a readable format. 4. The converted ss7.log file identifies: - the LIUs configured in the config.txt file - both the network name and CT Bus timeslot for each of the CICs resident on the configured trunks. Notes: The LIUs on the DSI SS7 boards start with LIU 0 and end with and LIU of the number of LIUs minus 1. The translated ss7.log file does not indicate if the attached trunk is an E1 or T1. It contains network device and CT Bus timeslot information for 32 devices per configured LIU. Although building a map of CIC to CT Bus timeslot may be straight-forward in simple configurations, building the map for a system that is connected to more than one SS7 node, particularly where the SS7 nodes are in different PSTN networks, can make the mapping task more difficult. Product List Dialogic® DSI SPCI2S, SPCI4 and SS7HD Network Interface Boards. Glossary of Acronyms / Terms CIC - Channel Identification Code Related Documentation Dialogic® DSI SS7 Protocols Software Environment Programmer's Manual
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