Siemens TC63 Benutzerhandbuch

s

TC63_ATC_V00.490

Page 235 of 501

5/24/05

Confidential / Draft - Do not copy

TC63 has an embedded TCP/IP stack that is driven by AT commands and enables the host application to easily

access the Internet. The advantage of this solution is that it eliminates the need for the application manufacturer

to implement own TCP/IP and PPP stacks, thus minimizing cost and time to integrate Internet connectivity into

a new or existing host application. This chapter is a reference guide to all the AT commands and responses

defined for use with the TCP/IP stack. 

Access is provided to the following Internet Services: 

Socket Client and Server for TCP, Client for UDP 

FTP Client 

HTTP Client 

SMTP Client 

POP3 Client 

Step-by-step instructions on how to configure and use TCP/IP communications with TC63: 
• First of all, create a connection profile with 

. The connection profile is a set of basic parameters

which determines the type of connection to use for an Internet service. Up to 6 connection profiles can be

defined, each identified by the 

. 

• Secondly, use 

 to create a service profile based on one of the connection profiles. Up to 10 service

profiles can be defined, each identified by the 

. The service profile specifies the type of

Internet service to use, i.e. Socket, FTP, HTTP, or one of the email services SMTP or POP3. To assign a

connection profile to a service profile, the 

 of 

 must be entered as "conId" value

of the 

 parameter 

. 

This offers great flexibility to combine connection profiles and service profiles. For example, you may have

one connection profile (CSD or GPRS) specified with 

 which can be associated with an SMTP ser-

vice profile for sending emails and a POP3 service profile for retrieving emails. 

• Once the connection profile and the service profile are created, an Internet session can be opened by entering

the 

 write command and the desired 

. Wait for the resulting URC. 

• The next command determines the action to be performed, for example reading data with 

 or writing

data with 

. Wait for the resulting URC. 

• Finally, to end a session, enter the 

 write command and the 

. 

Maximum number of profiles defined / used: 
• Up to 6 connection profiles can be created (with 

• Up to 10 service profiles can be created (with 

), but the number of parallel profiles of the same ser-

vice type is limited as listed below. If the maximum number of a service profile type is already defined, any

attempt to set up another profile for the same type will be denied with "+CME ERROR: unknown". 
- Maximum 3 HTTP profiles
- Maximum 6 socket profiles: Only 2 instances can be opened for listener, meaning that if 2 listeners are

established another 4 instances can be opened for clients. Also, the socket service can accept an incom-

ing connection only when at least one service profile is still free (not yet created with 

), otherwise

the incoming connection will be rejected from the listener. If there is no listener established all 6 socket

profiles can be configured as client. 

- 1 FTP profile
- 1  POP3  profile
- 1 SMTP profile

• The TCP/IP stack of TC63 supports using several service profiles at the same time, provided all of them are

running on the same connection profile. For example, it is possible to download files from an FTP server, while

sending and receiving emails at the same time. 

• GPRS connections established over the Dial-Up Network do not use the embedded TCP/IP stack of TC63