Multitech MultiModem Cell MTCBA-C1 User's Guide Page 99
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Chapter 17 – TCP APP AT Commands
Multi-Tech Systems, Inc. CDMA C1 AT Commands Reference Guide (PN S000478C) 99
Values: <mode>
0 Stop TCP/IP stack
1 Start TCP/IP stack
2 Configure TCP/IP stack
4 Save/Restore Configuration to/from NV memory
<optnum> when <mode> = 2
0 Default TTL of outgoing data grams. This option is a limit on the period of time or
number of iterations or transmissions that a unit of data can experience before it
should be discarded. The time to live (TTL) is an 8-bit field in the Internet Protocol
(IP) header. It is the 9th octet of 20. Its value can be considered as an upper bound
on the time that an IP datagram can exist in an internet system. The TTL field is set
by the sender of the datagram, and reduced by every host on the route to its
destination. If the TTL field reaches zero before the datagram arrives at its
destination, then the datagram is discarded. This is used to avoid a situation in which
an undelivered datagram keeps circulating in the network. Valid range is 0-255. The
default value is 64.
3 Number of bytes of initial TCP window. This option is used to specify the number of
bytes in the initial TCP window. A TCP window specifies the amount of outstanding
(unacknowledged by the recipient) data a sender can send on a particular connection
before it gets an acknowledgement back from the receiver. The primary reason for
the window is congestion control. Valid range is 536 to 65535. The default value is
16384.
4 Default MSS of off-link connections. This parameter specifies the initial size of TCP
segment which would be sent. Note that the TCP protocol layer will negotiate this
parameter when the socket is opened. Valid range is 536 to 1460. The default value
is 536.
6 Total number of sockets (TCP and UDP) that are allowed. This option specifies the
maximum number of TCP and UDP sockets that can be created at one particular
time. Valid range is 1 to 8. The default value is 8.
12 This option is used to specify the time from the first character received on the
UART/serial port until TCP data is sent to the network. It allows the application to
buffer TCP data before writing to the TCP socket. Note: If 536 bytes of data are
received on the UART/serial port before the timeout, the TCP data will also be
removed from the UART and written to the TCP socket.
This option value represents the number of 100 millisecond time periods to wait. For
example, setting this option to 10 will make the application wait at least 1 second (10
* 100msec) before sending data on the IP network. Valid range is 1 to 100. The
default value is 3.
54 The UDP packet size. When the socket is opened as a UDP socket, this option
determines the UDP packet size. The valid range is 536 to 1460. The default value is
1460.
55 ICMP Ping Reply. This is a flag which indicates if the modem should reply to the
ICMP echo request which is used by ping. The valid values are 0 and 1. The default
value is 0 which means that no reply will be sent.
<optnum> when <mode> = 4
0 Restore configuration data from NV memory. The current working TCP/IP
configuration will be overwritten with the configuration stored in NV memory.
1 Save configuration data to NV memory. The current working TCP/IP configuration will
be written to NV memory.
- CDMA-C1 AT Commands 1
- Contents 3
- Chapter 1 – Introduction 7
- Chapter 2 – AT Commands 8
- Overview 8
- Command Types 9
- Command Format and Syntax 9
- Input Command Syntax 10
- Other Syntax 10
- Output Response Syntax 10
- Parameter Defaults 10
- Unsolicited Message Syntax 11
- Attention AT 12
- Repeat Last Command A/ 12
- Echo E 12
- Bits +WUSLMSK 13
- Chapter 4 – Identification 15
- Commands 15
- Chapter 5 – Query Commands 17
- Chapter 6 – Global 18
- Configuration Commands 18
- Save Configuration &W 19
- Chapter 7 – Status Commands 20
- Chapter 8 – Communication 26
- Set Diagnostic Port +WDMX 27
- Set DCD Signal &C 27
- Set DTR Signal &D 28
- Set DSR Signal &S 28
- Automatic Answer S0 30
- Command Edit Character S5 31
- Chapter 9 – Call Control 33
- Hang-Up Command H 34
- Answer a Call A 34
- Incoming Call +RING 35
- Emergency Mode +WSOS 37
- Call Answered +WANS 38
- Call Connected +WCNT 38
- Call Ended +WEND 39
- Call Originated +WORG 40
- CPHS Command +CPHS 40
- Call Forwarding +CCFC 42
- Send DTMF Tones +VTS 44
- Chapter 10 – Network Service 45
- Signal Quality +CSQ 46
- Band Preference +WBND 49
- Service Indication +WSRV 50
- Roam Preference +WRMP 50
- Default Cell Band +WDCB 51
- Roaming Indication +WROM 51
- Chapter 11 – Provisioning 54
- Control Commands 54
- Excess SPC Failures +WLCK 55
- Download PRL +DPRL 56
- Commit Changes +WCMT 58
- Set IMSI +WIMI 58
- Slot Cycle Index +WSCI 60
- SID and NID +WSID 60
- Chapter 12 – OTASP / OTAPA 61
- Commit Successful +WOTC 62
- SPL Unlocked +WOTS 62
- NAM Download OK +WOTN 62
- MDM Download OK +WOTM 62
- IMSI Download OK +WOTI 63
- PRL Download OK +WOTP 63
- Chapter 14 – Short Message 70
- Service Control Commands 70
- Read Message +CMGR 71
- List Message +CMGL 72
- Delete Message +CMGD 73
- Chapter 15 – Audio Commands 79
- Microphone Gain +VGT 81
- Speaker Gain Control +VGR 82
- Digital Gain Receive +WDGR 84
- Echo Cancellation +ECHO 86
- Speaker Driver Gain +WSDG 87
- Audio Loopback &T 88
- Chapter 16 – Data Commands 89
- R-SCH Selection $QCMIP 90
- MIP Selection $QCMIPP 91
- Chapter 17 – TCP APP AT 98
- Chapter 18 – Sleep Commands 107
- Builds) 111
- Chapter 19 – Antenna 111
- Commands (Not for IP and GPS 111
- +WANTPOLL 113
- Auxiliary GPS Power +WANT 115
- Scenarios 118
- Call Processing 119
- Sending Binary Data 120
- TCP Socket Examples 121
- TCP Server Example 122
- ATZ, and AT&F 123
- Chapter 22 – CDMA 128
- Terminology and Acronyms 128
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