Specifications

Chapter 3 70

Problem Solving

If there are SIM switching problems

Problems can occur when switching between SIM cards or mobiles. The

two most likely cases are:

• Using different SIM cards from one country:

The ﬁrst time a test is run following the loading of a procedure, the

user will be prompted to make a call from the mobile. The

HP/Agilent 8922 then will acquire the SIM card’s IMSI number over

the GSM link.

Should the call end, any subsequent tests will attempt to page the

mobile using the stored IMSI number. Should this IMSI have

changed (by changing SIM cards or mobiles), then the MS

information individual test (Test 1) should be rerun (see

“Selecting a test sequence — Test Sequence menu” on page 17). This

test always prompts the user to originate a call from a mobile and in

doing so the IMSI number stored in the test set will be updated.

• Using SIM cards from different countries:

The MCC and MNC parameters (numbers 7 and 8) of the procedure

must match those of the SIM card (the defaults are both 1),

otherwise the mobile may not “camp on” to the network.

• To use a different MCC or MNC from the default:

Step 1. Create a custom procedure (see “Making your own test procedures” on

page 24) with MCC and MNC parameters 7 and 8 set accordingly. When

this procedure is selected, all tests will run using these values, or

Step 2. Select Edit Proc by pressing L2 on Sequence menu (see “Procedure

development – edit procedure” on page 25). Press TESTS, then select

Edit Parm from test function ﬁeld. Having modiﬁed the MCC and

MNC (see “Editing the test parameters” on page 27), press TESTS

followed by L2. (Continue) to return to Procedure Development mode.

Press L2 to run procedure using any parameter, sequence or

speciﬁcation modiﬁcations.

NOTE

Modiﬁed procedures must be run from the Procedure Development

screen only. Running a test from the Sequence menu causes the selected

procedure to be loaded from the card, overwriting any procedure

currently stored in the HP/Agilent 8922.