How to simulate SS7-ISUP protocol over E1 or T1 interface

Simulation on the SS7 protocol is carried out according to the connection of the TS's allocated to SS7 Channels defined in the profile.

The Clarinet Book USB E1/T1 which simulates the Signalling Point, uses the B port "From Network".

The Clarinet-Book can be connected to the E1 interface in:

extremity mode over E1. Clarinet inputs set as 75, 120 Ohms. See: wiring , connect, pin-out

The Clarinet-Book can be connected to the T1 interface in:

extremity mode over T1 with clarinet inputs set as 100 Ohms. See: wiring , connect, pin-out

A new profile can be created with the Wizard from the Template list by selecting:

Profile->New->SS7......See: building
Profile with a description including SS7, simu ISUP , PH=E1 or PH=T1
Filter with a description including SL, DL=SS7

Profile resulting from the wizard is ready for SS7 simulation over two channels.

The Channel 2 is configured as active: Generator and Responder behaviour are selected:
- the MTP2 layer will automatically be activated to reach the state 'In service'.
- One IAM message is generated after a delay of 1 second
- All Received IAM messages are replied by sending ACM+ANM messages after a delay of 5 secondes
The Channel 1 is configured as inactive: Generator and Responder behaviour are de-selected
- the MTP2 layer will not align.

Optional modifications to apply to the profile:

E1 Options: CRC4 multi-frame if CRC4 is used on the interface.
T1 Options: ESF/SF multiframing,.....
Interface Specs...->Physical Level: by default the clock source uses the Internal Clock

All conditions are set in the profile for the emulation and simulation over Channel 1.

The behaviour is activated:

Access to: behaviour of 1st channel
set the checkmark in front of Generator: the communication #1 which is selected will generate one IAM.
set the checkmark in front of Responder: incoming calls will be terminated by sending the selected messages (ACM, ANM.) defined under Responder panel.

The default TS's allocated to the SS7 channels are #16 (Channel 1- SL) and #1 (Channel 2- DL) .

Channel 1: in the profile access to Interface-Spec... ->Signalling Link :

Channel 1: in the profile access to Interface-Spec... ->Data Link :

Each of the Channels C1 and C2 have their own set of parameters.

Circuit values: in the profile access to Emulator Config. ->ISUP
- replace the default value(1-100 or 101-200) in front of Circuits in use
Value of Origine Signalling Point Code: in the profile access to Emulator Config. ->MTP3
- replace the default value in front of Signalling Point Code
- this value is used to fill the OPC field in ISUP message generated from Clarinet simulation
- this value is used to check the OPC/DPC fields in ISUP message received by Clarinet simulation and send the messages defined in Responder
Value of Destination Signalling Point Code: in the profile access to Emulator Config. ->ISUP
- replace the default value in front of Remote Signalling Point Code
- this value is used to fill the DPC field in ISUP message generated from Clarinet simulation
- this value is used to check the OPC/DPC fields in ISUP message received by Clarinet simulation and send the messages defined in Responder
Value of SLS: in the profile access to Emulator Config. ->MTP3
- replace the default value in front of Signalling Link Code
- this value is used to fill the SLS field in ISUP message generated from Clarinet simulation

To launch the profile:

Select Profile->Run or click over . It allows to select the name of profile. See Running a test
The windows of the Event-Editor is automatically opened.

To stop the profile

No messages displayed on the Event-Editor windows. Check if the Alarms line have an indication such as ' -+ FL' or '++FL' meaning that no signal is detected.
The protocol messages are displayed on the wrong directions: the E1 or T1 pair connected to the A and B port are the reverse side.

updated: 27-Feb-04