Command Reference - Stollmann

TA+USBA Command Reference 1.01/06.2007
2. Using the TA+USB
2.2.1 ISDN specific AT commands
Setting up special ISDN parameter:
(only one command is allowed per AT command)
**BSIZE
Set B channel block size
Defines the maximum length x of a data block transmitted or received in B channel.
This parameter value depends of the configured B-channel protocol.
• prot=10 BSIZE = 2048
• prot=20 BSIZE = 128
• prot=21 BSIZE = 128
AT**BSIZE=x
Note: The value will be changed by setting the B channel protocol (ATBx).
**DTE
Set B channel Layer 2 address
Selects the Layer 2 link addresses. Only valid for X.25-B protocol.
AT**DTE=0 calling side reacts as DTE,
called side reacts as DCE (default, X.75 standard)
AT**DTE=1 TA reacts as DTE (own cmd.-adr. = 01)
AT**DTE=3 TA reacts as DCE (own cmd.-adr. = 03)
Note: The value will be changed by setting the B channel protocol (ATBx).
**ISDN
Select D channel protocol
Selects ISDN D channel protocol to the ISDN line. The protocol must fit the protocol
running on the ISDN line otherwise a connection cannot be set up.
Note: after changing and storing the ISDN protocol the TA has to be reset by
powering it off and on (alternately you can use the command
AT&W**RESET).
AT**ISDN=0 Select DSS1 (Euro-ISDN) (default)
AT**ISDN=1 Select 1TR6 (Germany national) (Option)
AT**ISDN=2 Select DSS1 NT mode (Euro-ISDN) (Option)
AT**ISDN=5 Select Bellcore National ISDN-1/2 (USA) (Option)
AT**ISDN=6 Select NTT INS-NET (Japan) (Option)
AT**ISDN=7 Select AT&T 5ESS (USA) (Option)
AT**ISDN=8 Select VN-4 (France) (Option)
AT**ISDN Show selected ISDN protocol
AT**?ISDN Show available ISDN protocols
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