Troubleshooting
TCP Receive Window = 146000
Selective ACK:s = Yes
Max Duplicate ACK:s = 2
RFC1323 TCP Window Scaling = Yes (enabled)
Note: Windows Vista and recent versions of Linux kernels have
automatic window scaling enabled by default and should not need
any TCP tweaking.
6.5 Telephony and Fax Service Table 25
Indication/Symptom What to do
Cannot make or receive a call from
a telephone connected to the
Ericsson W25.
Make sure that the phone is
working, for example by connecting
it to a fixed line telephone network
(PSTN). The phone has to be of a
standard touch tone type (with
DTMF keypad support).
Note: Some old phones have a
keypad, although they do not
support DTMF. These phones are
consequently not supported by the
Ericsson W25.
Connect the phone directly to the
Phone connector on the Ericsson
W25. Verify that a dial tone is heard
when picking up the handset. If not,
replace the handset and restart the
Ericsson W25. Allow some two
minutes for the startup and then
listen for the information tone
again.
If an information tone other than the
dial tone is heard when lifting the
handset verify that the SIM card is
correctly inserted, re-enter the PIN,
or enter the PUK and a new PIN to
unlock the SIM card. The method to
use depends on the type of
information tone. For information
about tones, see section 3.2 –
Information Tones.
76 5/1551-CRH 102 167 Uen Rev E 2008-02-15