Refraction Technology 130-01, Operation Manual

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Doc-1301-Ops Rev 2.9.1 10/30/08
Refraction Technology, Inc. 55
3.4 SLM Modem module
The SLM2456 modem module is used in the 130-Modem and as the internal
modem for the 130-01. The SLM2456 is a complete, modem module that is
based on the Si2456 chipset. The Si2456 is an ITU-V.90 compliant, 56 kbps
modem chipset with integrated direct access arrangement (also called DAA it
includes parallel phone detect, over-current detection and global PTT
compliance). This provides a programmable line interface to meet global
telephone line requirements. It is a single design that includes a DSP data
pump, a modem controller, on-chip RAM and ROM, an analog front end
(AFE) a DAA, and analog output.
Note: The 130-8137 modem cable is used with the 130-01 when supplied with an
internal modem.
3.4.1 Modem features
The SLM2456 accepts standard modem AT commands and provides connect
rates up to 56/33.6/14.4 kbps full-duplex over the Public Switched
Telephone Network (PTN). It also features a complete set of modem
protocols including all ITU-T standard formats up to 56 kbps.
Note: This material is part of the Silicon Laboratories® Si2456/33/14 data sheet
document revision 1.0. See the Si2456/33/14 Users Guide
(“AN70:Si245/Si2433/Si2414/Si2403 Modem Designer’s Guide) for detailed
feature explanations.