IS-101 Voice Mode AT Commands

Table 25. Voice Mode Command Descriptions (Continued)

Command

Default

 

Description

 

 

 

 

 

Flow Control Select: This command allows the DTE to identify and select the types of flow control

 

 

used. DCEs using the IS-101 standard must support in-band XON/XOFF flow control. XON is the

 

 

ASCII <DCI> character (11h); XOFF is the ASCII <DC3> character (13h). The DCE may provide ITU-Ts

+FLO=m

1

V.24 CTS (circuit 106) and RTS (circuit 133) for flow control.

0

Disables XON/XOFF and CTS/RTS flow control

 

 

 

 

1*

Enables XON/XOFF flow control in either direction

 

 

2

The DTE uses ITU-Ts RTS to control flow to the modem; the modem uses ITU-T CTS to

 

 

 

control flow to the DTE.

 

 

 

 

 

Buffer Threshold Setting: This command specifies the flow control assert and deassert points inside

 

 

the DCE’s internal transmit buffer. The internal buffer is 512 bytes. The +VBT=m parameters are fixed

 

 

in firmware and cannot be changed.

 

 

m = <deassert>, <assert>

 

 

Defaults: <deassert> = 192, <assert> = 320

 

 

<assert>: This parameter stops data transfer from the DTE when the number of bytes in the buffer

+VBT=m

see ‘m’

reaches the lower number of the range specified by the <assert> parameter. So that no data is lost

before the modem stops the flow of data, the <assert> parameter allows more data to enter the buffer

 

 

 

 

until it reaches the larger number in its range.

 

 

Range: <assert> = 192

 

 

<deassert>: This parameter starts data transfer from the DTE after the number of bytes in the transmit

 

 

buffer falls below the <deassert> value.

 

 

Range: <deassert> = 320

 

 

 

 

 

Caller ID Selection: This command controls the reporting and presentation of data in the ICLID

 

 

(Incoming Call Line ID) data format used by the Caller ID services in the United States and Canada. At

 

 

a minimum, the data sent to the DCE includes the date, time, and the caller’s telephone number. Caller

 

 

ID information is sent to the DTE during the first and second ring signals when the modem is in voice,

 

 

data, or fax mode.

 

 

0*

Disables Caller ID

+VCID=m

0

1

Enables Caller ID with formatted presentation to the DTE. The modem presents the data

 

 

 

items in a <Tag><Value> pair format. The expected pairs are data, time, caller code

 

 

 

(phone number), and name.

 

 

2

Enables Caller ID with unformatted presentation to the DTE. The modem presents the

 

 

 

entire packet of information, excluding the leading Us, in ASCII-printable hex numbers.

 

 

NOTE: If S0=1 (auto-answer mode) and Caller ID is enabled in data modem mode, then the modem

 

 

 

answers only after the second ring signal.

 

 

 

NOTE: An asterisk (*) denotes the factory-default setting.

 

 

 

 

72

536EX Chipset Developer’s Manual

Intel Confidential

Page 71 Page 73
Page 72
Image 72
Intel 537EX manual +FLO=m
Page 71 Page 73

537EX specifications

The Intel 537EX is a powerful and innovative embedded processor designed for a range of applications, particularly in the fields of industrial automation, telecommunications, and transport management systems. This processor is a member of Intel's embedded product line, tailored specifically to meet the demands of systems that require high reliability and long lifecycle support.

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