32 multisocket – Rainbow Electronics GE863-PRO3 User Manual
Page 26
GE863-PRO
3
Product Description
80285ST10036a
Rev. 1 - 08/08/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 26 of 55
3.32 Multisocket
New functionality of the Telit modules, multisocket is an extension of Telit Easy GPRS feature, which
allows the user to have two contexts activated (that means two different IP address), more than one
socket connection (with a maximum of 6) and simultaneous FTP client service.
The basic idea of multisocket is the possibility of suspend a socket connection with the escape
sequence +++.
With IP Easy we can use a SKTD to open a socket connection and go online. After online activities we
use +++ sequence to close the connection (see the figure below).
Where the green part represents the module command mode while the red part is the online mode.
Now, the online mode can be suspended with the escape sequence by using the multisocket feature.
During suspend mode the data received by the socket will be buffered. These data will be displayed
after socket resumption, as shown in the figure below:
O
O
n
n
L
L
i
i
n
n
e
e
+
+
+
+
+
+
O
O
n
n
l
l
i
i
n
n
e
e
m
m
o
o
d
d
e
e
D
D
a
a
t
t
a
a
T
T
r
r
a
a
f
f
f
f
i
i
c
c