Packet Data Connection Troubleshooting

Possible Setup Issues

Packet data connection is a wireless device (such as a MS supporting packet data services) initiated procedure.

• Before trying to establish a packet data connection, you must make sure that the following settings properly configured:
  • Cell band, channel and System ID must be set to the proper values for your wireless devices so that it can successfully camp on the test set (see How Do I Set Up a Call? ).
  • Packet Data Service Options must be set to SO33 or SO33 (+F-SCH).
  • LAN IP Address 2 (Data+) should be configured correctly if it is not grayed out in the Instrument IP Setup menu. This address must be set on the same subnet as the LAN IP Address and must not be identical to the LAN IP Address.
• If the test set's internal PDSN (providing simple IP protocol) is used for packet data connection, you must properly set a DUT IP Address for your wireless device and make sure the External PDSN State is set to Off (see Data Channel Parameters ). For an example packet data connection procedure using Simple IP protocol, refer to Packet Data Service Example Procedure (via Simple IP) .
• If the external MOB-IP-SIM is used to supply the PDSN simulation (providing Mobile IP protocol),
  • the MOB-IP-SIM must be properly configured. See How Does Test Set Support Simple IP? .
  • you must properly specify the External PDSN IP Address and the External PDSN TCP Port , then turn the External PDSN State to On from the test set.
  • see Packet Data Service Example Procedure (via Mobile IP) for an example Packet Data Connection procedure with Mobile IP.
• If your data channel application does not seem to be working, try pinging the device. Also, The test set has a ping feature, and so do most computer operating systems. See Ping for more information.
• Ping does not work: Verify that your device supports ping. The device must be in a packet data connection in order for ping to work. This may require that you initiate a data transfer from the mobile station. Also, Ping and Data Channel are only available in Active Cell operating mode with IS-2000 system type selected.
• Ping log has an unknown IP address: If you log a Ping that originated from the test set, the Ping forward link Source Address and the reverse link Destination Address have a fixed value of 130.29.181.203. This is because the test set uses an internal address to originate IP data from the test set to the mobile station. See Protocol Logging During Ping for more information.

Other Considerations

• While on a packet data connection, changing service option may cause the data connection dropped. See Considerations When Changing Service Options .
• While on a packet data connection, you can change F-SCH data rate but may be rejected by the MS. See Considerations When Changing F-SCH/R-SCH Data Rates .
• To check the current status of the packet data connection, see Packet Data Connection Processing States .
• You must properly set the External PDSN State which determines whether the PDSN simulation for packet data service is provided by the test set (using Simple IP protocol) or by the external application (MOB-IP-SIM) (using Mobile IP protocol). See Setting Considerations for External PDSN State .
• When the external MOB-IP-SIM is providing PDSN service to the mobile stations, the mobile station's IP address is assigned by the MOB-IP-SIM. The setting by DUT IP Address is ignored and the Ping the DUT from the test set functionality is not available.
• While on a packet data connection, you can perform hard handoffs, but can not make soft handoffs. See Handoffs Available for Packet Data Services .
• Use Ping function to verify the system interconnect.

Related Topics

Data Channel

Packet Data Service Example Procedure (via Simple IP)

Packet Data Service Example Procedure (via Mobile IP)