User`s guide

Problem Potential resolutions

BLER (Data Connection Type) measurements have Problem solutions noted above for Attach apply.

problems

Ensure the MS is capable of GMM_INFORMATION

messaging. This is the type of message sent by the test set

to provoke an ACK/NACK from the mobile. If the mobile is

not capable of GMM information messaging, then the data

connection will timeout.

One possible solution: set the LLC frame check sequence

to Corrupt. This will stop the message getting to GMM and

the mobile should still provide the ACK/NACK. Go to the

Call Setup Screen; Call Parms column; Menu 4 of 4 (More

key); Connection Parameters (F7 key); scroll in the

Connection Parameters table to LLC Frame Check

Sequence; change the table value to Corrupt.

It is possible that the mobile is capable of GMM messaging

but GMM is prioritized too low and the wireless appliance is

unable to sustain the link.

One solution is to change the BLER Block Polling Interval.

This will allow the mobile to send the ACK/NACK less

frequently (one negative result: TX measurements will be

slower since the mobile is not transmitting every frame.)

Go to Call Parameters; 4 of 4; Connection Parameters table.

ETSI Test Mode measurements have problems Check that the mobile is capable of the ETSI test mode you

would like to use; if not, it will not work.

Check the same parameters as in "wireless appliance will not

attach" above.

The Attach condition terminates prematurely This may be a connection reconfiguration problem. When any

of the connection parameters are reconfigured the connec-

tion is terminated.

The mobile likely does not have the

PACKET_TIMESLOT_RECONFIGURE message implemented.

This message is used to change MSTXL, channel, Band,

Coding Scheme, Multislot configuration, and offset P0.

The solution when using the PACKET_TIMESLOT_RECON

FIGURE message is to stop the data connection before

changing parameters, then restart the data connection.

Alternatively, you can change the message used to change

parameters to PACKET_DOWNLINK_ASSIGNMENT; or, for

power changes use the

PACKET_POWER_AND_TIMING_ADVANCE message. Go to

call parameters, 1 of 4.