Multiple Channel Definitions; Gprs Definitions - Motorola G24 Guide Developer's Manual

Note:

Multiple Channel Definitions

The following table provides various multiple channel definitions.
Term
Command
response
Unsolicited
indication
AT+CMUX
command
Common
settings for all
channels

GPRS Definitions

•
A GPRS session is suspended when a voice/CSD call is connected to the G24. The GPRS
session is resumed when the voice/CSD call is disconnected. The voice/CSD call can be
dialed when the GPRS session is either in online DATA mode or online COMMAND mode.
•
A GPRS session cannot be started (ERROR returned) when there is an active or established
Voice/CSD call.
•
Simultaneous GPRS sessions of any kind (internal and/or external) are not supported.
Note:
December 31, 2007
•
RING Alert: When the call type is unrecognized, it is considered as a voice call.
In such a case, RING will be sent to IDLC-2 only.
•
When IDLC-1 (External modem) is active, no operation should be made in
IDLC-3 and IDLC-4. When IDLC-3 or IDLC-4 are active, no operation should
be made in IDLC-1.
•
In the case of a 2-channel configuration (IDLC1 = External modem + GPRS +
CSD; IDLC2 = AT and VC), the IDLC-1 commands that are allowed comprises
the combination of the above DLC-1, IDLC-3 and IDLC-4 columns.
Table 3-291: Multiple Channel Definitions
A response to a command is delivered back to the channel from which the command
was sent.
Unsolicited indications are sent only to the channel that enabled them. Enabling
indications where it is not allowed may cause unexpected results.
Exception: Some of the indications can be enabled only in one specific channel. For
more information, refer to
Configuration," on page
Any G24 IDLC receiving an AT+CMUX command returns an ERROR response –
+CMEE: "operation not allowed".
Settings that are not stored in the IDLC modem profile, but that are set in one of the
G24 components. Any modification to these settings overrides the previous settings in
all the other channels.
For example, Database settings (phonebook, Flex, audio settings, network (SIM)
settings, and so on. For this reason, parallel commands are not allowed in more than
one channel. All the settings that are private for each channel (can be different in
different channels) are mentioned in the Profile Definition column in
"AT Commands Limitations for 4-Channel Configuration," on page
While G24 is operating network-related AT commands, such as SMS or Supplementary
Services, GPRS session behavior will be the same as for Voice/CSD call, but for brief
moments only.
AT Commands Reference Manual
Chapter 3: AT Commands Reference
Description
Table 3-290, "AT Commands Limitations for 4-Channel
3-443.
Table 3-290,
3-443.
3-453