Nokia Net Monitor description (DCT3)

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Test 43 – Layer 2 (Data Link) Timeout Counters

Available in: 2100, 3330, 5110, 6150, 6210, 7110, 8210, 8250

This information shows the state of the T200 counters.

Test screen	Help screen

T200MS: Number of T200 expirations for the MS (phone).

T200BS: Number of T200 expirations for the BS (network).

The T200 timer is used by the data link layer to timeout unacknowledged frames (for frames transmitted in acknowledged mode). When some form of acknowledgement from the remote entity is received, this timer is reset. If this timer expires, re- transmission occurs. This is somewhat like the Internet’s TCP behaviour.

[GSM 04.06:5.x]

These counters will stop when they reach their maximum value (9999). Counters can be reset to 0 with “Test 40 – Reset Handover Counters” or “Test 60 – Reset Field Test Counters”.

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