CH1788 Cermetek Microelectronics, CH1788 Datasheet - Page 11

• Manufacturer Part Number: CH1788
• Manufacturer: Cermetek Microelectronics

Specifications of CH1788

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Cermetek Microelectronics, Inc.
PSTN LINE CONNECTION GUIDELINES
1. The CH1788 must be mounted in the final
2. The circuitry from the CH1788 to the telephone
3. Connection to phone line should be made
4. PCB traces from the modem’s RING and TIP pins
2006 Cermetek Microelectronics, Inc.
The tables included in this data sheet are a
summary of the AT commands and S-Registers. A
detailed description of all commands and registers is
available from Cermetek Microelectronics, Inc., and
should be consulted prior to design.
Cermetek publication CH1788 AT Commands and
S-Registers Reference Guide or access our website
at http://www.cermetek.com.
Commands
Table 5. CH1788 AT Command Set Summary.
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.
line interface must be provided in wiring that
carries no other circuitry
specifically allowed in the FCC rules.
through an approved RJ-11C jack.
to the RJ-11C jack must be 0.1 inch spacing or
Basic
+++
@T
@Z
AT
A/
W
C
D
H
N
O
Q
R
A
E
F
K
P
S
T
V
X
Y
Z
L
I
IMPORTANT NOTE
Carrier Detect DCD Signal Monitor
Dial Command
Load Factory Default
Switch Hook Control Option
Fast Connect Option
Data
Monitor
On-Line Command
Result Code Display Option
Data Terminal Ready DTR Monitor
Extended Result Codes
Test Modes
Escape Sequence
Attention Code
Answer command
Repeat last Command
Off-Line Character Echo Option
Identification Option
DCE-DTE Flow Control
Pulse Dial
S Register Monitor
Tone Dialing
Verbose / Numeric Result Codes
Result Code Set/Call Progress
Async. Speed Buffered Option.
Reset
Power Down
Set
Function
Ready
other
DSR
than that
Refer to
Signal
Page 11
5. The RING and TIP PCB traces should be as
6. No additional circuitry other than that shown may
7. The CH1788 requires external surge protection.
8. The CH1788, the RJ-11C jack, the protection
9. The supplied FCC registration label must be
10. The product’s User Manual must provide the user
CH1788
RECOMMENDATIONS
The CH1788 contains static-sensitive components
and should only be handled by personnel and in
areas that are properly protected against static
discharge.
Direct Soldering.
soldered. All CH1788 products are moisture resistant
and will not be harmed by industry standard aqueous
cleaning
recommend SMD or wave soldering.
recommends against socketing the modem for
production products.
purposes, a 68 pin PLCC socket may be used.
FCC REGISTRATION
The CH1788 is registered with the FCC (Federal
Communications Commission) under Part 68.
maintain the validity of the registration, the end
product supplier must notify to the end user of the
product of several restrictions the FCC places on the
CH1788 and its use.
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.
short as possible and oriented to prevent
coupling other high speed or high frequency
signals present on the host circuit PCB.
be connected between the modem module and
the RJ-11C jack.
FCC approval.
This is mandatory to maintain FCC Part 68
conveyed
recommended components and values. Do not
use an MOV or a Transorb.
circuitry and all PCB traces in between, must be
contained on a PCB with a 94 V-0 flammability
rating.
applied visibly on the outside of the product.
with instructions for connection and use as
recommended in the FCC Registration Section
below.
processes.
HANDLING
CH1788 Surface Mount PLCC 2400bps Modem
approval.
Document No. 607-0018 Revision A6 (01/06)
The CH1788 requires hand
Doing so will invalidate the
However, for development
Cermetek
AND
Please
The traces should
ASSEMBLY
does
use
Cermetek
NOT
only
To