How to simulate the ISDN User over PRI E1/T1

How to Simulate one Basic Call over PRI E1/T1 from the User Side

Simulation of an ISDN terminal is one of the features directly covered by the templates included in the Clarinet Run-Time.

The Clarinet Book USB E1/T1 which simulates the User side in front of a Network, 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->ISDN......See: building a test
- ETSI
- ATT
Profile with a description including ISDN, Simu, User, PH=E1 or T1, SL=Q931
- ETSI
- ATT
Filter with a description including SL= Q931, DL=BOP

Example using the wizard:

ProfileèNewèISDNèETSIèisdn_etsi_simu_usr_e1.acpèFilter?èisdn_etsi_bop.acf
ProfileèNewèISDNèATT-5ESSèisdn_att_simu_usr_t1.acpèFilter?èatt_etsi_bop.acf

Profiles resulting from the wizard are ready for monitoring in the D channel with Q931 decoding:

Modifications to apply to the profile regarding physical interface:
- E1 Options: CRC4 multi-frame if CRC4 is used on the interface.
- T1 Options: ESF/SF multiframing,.....

Modifications to apply to the profile regarding Q931 signalling:
- Changing the dialed number: Generator è Comm1 èEdit è Called Party NumberèCoding

Saving the profile:

To launch the profile:

Select Profile->Run or click (it allows selection of the profile name). See Running a test
The Event-Editor window 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 in the wrong directions: the E1 or T1 pair connected to the A and B port are the reverse side.