CH1794A Cermetek Microelectronics, CH1794A Datasheet - Page 11

• Manufacturer Part Number: CH1794A
• Manufacturer: Cermetek Microelectronics

Specifications of CH1794A

• Lead Free Status / RoHS Status: Not Compliant

Cermetek Microelectronics, Inc.
Enter:
Result:
Where n is a decimal number corresponding to the
selected option as described below.
Refer to Application Note # 174, Caller ID Feature For
CH1786A, CH179XA and CH2056A Modems, for
additional information and examples.
The AT+VRID command affects the format of the data
provided by the PSTN Caller ID services for the last
received call. The DTE is presented this data once
every time the +VRID command is executed.
Enter: AT+VRID=n<CR>
Result: Data Stream from most recent call
Where n is a decimal number corresponding to the
selected option as described below.
Refer to Application Note # 174, Caller ID Feature For
CH1786A, CH179XA and CH2056A Modems, for
additional information and examples.
2007 Cermetek Microelectronics, Inc.
Caller ID (CID) requires that the PSTN service
provider supply the required data.
feature will report the NULL string if the CID service
is not activated by the PSTN service provider.
0
1
2
0
1
AT+VCID=n <CR>
OK<CR><LF>
Disable Caller ID reporting. (Default.)
Enables
presentation to the DTE.
presented is in a <Parameter Description>
<Value> pair format.
are: date, time, name, and caller code
(telephone
presented.
Enables
presentation to the DTE.
presented
HEXADECIMAL data is presented.
Reports
presentation to the DTE.
presented the data items in a <Parameter
Description> <Value> pair format.
expected pairs are: date, time, name, and
caller code (telephone number).
Reports
presentation to the DTE.
IMPORTANT NOTE
Caller
Caller
Caller
Caller
number).
in
a
ID
ID
ID
ID
continuous
The expected pairs
with
with
with
with
ASCII
The Caller ID
The data is
The data is
unformatted
unformatted
The data
formatted
formatted
data
string.
The
is
Page 11
PHONE LINE CONNECTION GUIDELINES
1.
2.
3.
4.
5.
6.
7.
8.
9.
The HS modem family supports Caller ID.
CANADIAN APPROVALS
The HS Modem family is approvable for use by
Industry Canada to CSA CS-03 Part I. The CH1799A
has been approved by Industry Canada and the
registration number for CH1799A is listed on page 1.
Approval for other products in this family are available
upon request.
The HS Modem must be mounted in the final
assembly such that it is isolated from exposure to
any hazardous voltages within the assembly.
Adequate separation and restraint of cables and
cords must be provided.
The circuitry from the HS Modem to the
telephone line interface must be provided in
wiring that carries no other circuitry other than
that specifically allowed in the FCC rules (such as
A and A1 leads).
Connection to phone line should be made
through an RJ-11C jack.
PCB traces from the modem’s RING and TIP pins
to the RJ-11C jack must be 0.1 inch spacing or
greater to one another and 0.2 inch spacing or
greater to all other traces.
have a nominal width of 0.020 inches or greater.
The RING and TIP PCB traces should be as
short as possible and oriented to prevent
coupling other high speed or high frequency
signals present on the host circuit PCB.
No additional circuitry other than that shown in
Figure 6 may be connected between the modem
module and the RJ-11C jack.
invalidate the FCC approval.
The HS Modem, the RJ-11C jack, the interfacing
circuitry and all PCB traces in between, must be
contained on a PCB with a 94 V-0 flammability
rating.
The supplied FCC registration label must be
applied visibly on the outside of the product.
The product’s User Manual must provide the user
with instructions for connection and use as
recommended in the FCC Registration Section
below.
CH179XA/2056A High Speed Family of Ultra Small Modems
Document No. 607-0020 Revision B (01/07)
The traces should
Doing so will