Rainbow Electronics GM862-QUAD-PY - Manual (Page 30)

Easy GPRS User Guide
80000ST10028 Rev. 4 - 16/07/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 30 of 63
FTP with CMUX is locked on the opening port. So if we try to open an FTP client connection on
another virtual port the FTP commands will show an error message until the first connection with FTP
server is not closed. When the connection is closed we can open another FTP session on another
virtual port. In any case we can always have only one FTP session opened at the time.
2.1.2.7 4.1 Using old interface command on Multisocket
The old commands like #SKTD or #SKTL are available also on multisocket platform and they work like
in the old IP Easy platform. If we open a connection with #SKTD we can’t suspend the connection,
and the +++ sequence will close definitively the connection.
In particular with #SKTD command we have the possibility to open three simultaneous connections
using CMUX virtual ports. They are closed using the +++ sequence.
Note: #SKTOP has some limitations. It is available only on the first virtual port of CMUX and it is
recommended not to use it with the new multisocket commands because #SKTOP deactivates the
context when the connection is closed. This can generate the closure of suspended sockets. It’s
strongly recommended in any case to avoid using old IP Easy command with new multisocket
commands.
2.1.2.8 5.1 Dial Up with Multisocket
With multisocket we recommend you to use the first context for a dialup connection and use the other
available context for IP Easy socket connection.
The first context must be deactivated to make dialup connection work correctly, if we activate IP Easy
and dialup at the same time the performance get worse. It is possible to make web browsing and IP
Easy socket connection at the same time.
2.1.3 Known limitations
The implementation of the EASY GPRS feature has the following known limitations:
• #SKTOP is available only on the first virtual port of CMUX
• PPP and IPEasy functionalities not on the same IP Address (PPP uses always the first Cntx Id)
• Multi listen only on different IP ports