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Welcome Roamer monitors the roaming signaling links using the high impedance SS7 interface and captures location registration information of an in-roamer or out-roamer. During location registration acknowledgement, mobile number for the in-roamer/out-roamer and the Global title of visiting network MSC is captured by the SS7 interface and the available information can be used for further processing logged for profiling roamers. Pre-defined welcome message depending on the VLR address (for out-roamer) or mobile number (for in-roamer) can be picket and sent using SMSC interface.
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 SS7 Probe
SS7 Interface (High Impedance): This high impedance SS7 interface monitors the signaling messages for roamers when they are registering into a network. The probe uses SS7 standard to monitor and filter the roaming related SS7 messages. The Probe software filters received incoming frames and forwards this signaling data to a user application, which decodes the messages and filter, messages for location registration. On getting a location Registration Message a trigger is generated for the messaging application server passing the relevant information. |
No of signaling links: ½ E1 per line processor on board. 2 complete Signaling links per board
Signaling connection: E1/T1 line interface timeslot or CT bus channel
Data rates: Configurable masking of data bits allows various data rates
Including 48kb/s, 56kb/s and 64kb/s
Per-link performance: Up to 1 Erlang
Aggregate performance: Up to 2600 frames/sec
Statistics Capability:
Number of frames received
Number of frames reported to the user
Number of occurrences of congestion
Number of frames discarded due to congestion
Number of frame errors
Filtering: Configurable, based on length of the received frames |
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Solution Setup
The solution is based on receiving signals on its receive links and keeping the transmission links open there by causing the impedance load imposed to be infinite. The code file “monitor.dc3” containing the on-board software is downloaded as part of the card reset sequence. Once configured, whenever a frame is received it is reported to the user's application as an API_MSG_RX_IND message. From the Service indicator field (0 to 4 bits) we can make out whether this is a circuit-related information (SI 4 or 5) or this data was meant for non-circuit related information (SI 3). In case of non-circuit related information the messages corresponding to location registration acknowledgements are filtered and passed messaging application for further processing. |
Welcome Roamer
