Technical data

46
Format Service Indicator/Additional Service Indicator
Number Sets the Service Indicator to the provided value. The
Additional Service Indicator is set to zero. The number
should be in the range 1 ... 7.
AT +iS<Format>
Number1/N
umber2
Number 1: Service Indicator. It should be in the range of 1
... 7. Number 2: Additional Service Indicator. It should be in
the range of 0 ... 255. [f]
At +iT<n> ISDN trace options. Reserved for use by Dialogic. <n> ranges from 0 to
255.
<n> Erases/sets slow application workarounds.
0 Erases workarounds. Equivalent to AT command:
AT+IW=0+IX=0+IY=0+iZ0
AT +iH[<n>]
1 Sets workarounds. Equivalent to AT command:
AT+IW=1+IX=81+IY=8+iZ80
AT +iW<n> Defers receive notifications to <n> bytes/millisecond. <n> should be in
the range of 0 ... 64000.
AT +iX<n> Respects read block size and defers receive notifications. <n> should be in
the range of 0 ... 64000.
AT +iY<n> Defers transmission to <n> bytes/millisecond. <n> should be in the range
of 0 ... 8.
AT +iZ<n> Splits large frames into <n> byte segments. <n> should be in the range
of 0 ... 2048.
AT +iU=<BC>|<BC/LLC> Sometimes the Service Indicator and Additional Service Indicator are not
flexible enough to indicate the necessary information in bearer capabilities
(BC) and low-layer compatibility (LLC) that the user wants to provide for
an outgoing call. In this case, the user can set these values directly. For
example, to indicate a V.110 call with 38400 bps and the appropriate flow
control option, the user can enter the command:
AT+IU=<8890214d00bb> to specify the BC value. The provided BC and
LLC values are used without any verification (except max. length of
information element) to create the SETUP message sent over the D-
channel. This allows the use of proprietary BC/LLC values not yet covered
by standards. See Call parameter (BC/LLC) selection on page 57 for
details.
AT +iI Reserved.
Mode Global TTY mode. See Incoming RAS call type
autodetection on page 53 for details.
AT&F16+IE=piafs
32k
China 32K PIAFS link
AT +iE=<Mode>
AT&F17+IE=piafs
64k
China 64K PIAFS link