Features and Specifications

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[Installing Your Internal Modem]
[Installing Your External Modem]
[If You Need Help]

This chapter provides you with some technical details about your modem. You do not have to understand this information to get started with your modem. However, you'll want to note which optional features your modem supports. Also, if you are ever in a situation where you need to know the technical capabilities of your modem, you can refer to this Appendix.

Optional Features

To learn which optional features your modem supports, issue the command ATi10 from your telecom software terminal mode. This displays a list of option numbers which are briefly described in the table below. These are the optional features that your modem does support.

Option	Description
101	Fax Class 1
115	ITU-TSS (formerly CCITT) V.17, 14,400 bps Fax
120	Worldwide Support
121	ITU-TSS V.23
123	BLACKLISTING
140	ITU-TSS V.32bis, 14,400 bps Data
146	AT\S configuration display
147	V.FC 28 Kbps
149	V.FC 24 Kbps
150	Enhanced &F Option
151	Enhanced Rate Control
153	ITU-TSS V.34, 28,800 bps Data
157	RINGING Response Code
163	ADPCM Compression Voice Datapump Based
170	Powered Handset Support
171	Headset Support
173	Line Current Sense
176	Full-duplex Speakerphone
180	16550 UART
181	SupraSMART UART
185	Serial Plug and Play
186	V.80 Sync Access Mode
201	ITU-TSS V.34, 33,600 bps Data
202	V.25ter Annex A
204	Rockwell-based K56flex, 56,000 bps Data
205	ITU V.90 53,000 to 6,000 bps Data

Modem Models and Features

The tables below describe the SupraExpress 56 models and the special features they support.

External Modems

Model	Data/Fax/ Voice
SupraExpress 56e PRO	X

Internal Modems

Model	Data/Fax/ Voice	Speaker- phone (optional)	Microphone & Speaker jack (optional)
SupraExpress 56i PRO	X	X	X

These tables describe a few of the modems' capabilities. The remaining sections of this chapter provide an overview of the full features and specifications of your modem.

Fax Specifications

Speeds 14,400; 12,000; 9600; 7200; 4800; and 2400 bps
Class 1 software compatible
Works with Group 3 fax machines
ITU-TSS V.17, V.27 ter, and V.29

Data Specifications

Data Speeds

ITU-TSS V.21 and Bell 103 at 300 bps
ITU-TSS V.22 and Bell 212A at 1200 bps
ITU-TSS V.22bis at 2400 bps
ITU-TSS V.32 at 9600 and 4800 bps
ITU-TSS V.32bis at 14,400; 12,000; 9600; 7200; and 4800 bps
V.34 at 33,600; 31,200; 28,800; 26,400; 24,000; 21,600; 19,200; 16,800; 14,400; 12,000; 9600; 7200; 4800; and 2400 bps.
K56flex at 56,000; 54,000; 52,000; 50,000; 48,000; 46,000; 44,000; 42,000; 40,000; 38,000; 36,000; 34,000; 32,000
DTE speed from 300 to 230,400 bps

Data Compression and Error Correction

MNP classes 2-5
ITU-TSS V.42 (with LAPM) and V.42bis (BTLZ)
Throughput up to 57,600 when used with MNP 5 or 230,400 bps with ITU-TSS V.42bis data compression.

Asynchronous Data Formats

Start bits	Data bits	Parity	Stop bits
1	7	even or odd	1 or more
1	7	none	2
1	7	mark or space	1 or more
1	8	none	1 or more

Data Encoding

9600 and 14,400 bps (V.32 and V.32bis) - Trellis Coded Modulation/Quadrature Amplitude Modulation (TCM/QAM).
2400 bps (V.22bis) - Quadrature Amplitude Modulation (QAM): 16 possible symbols of combinations of 12 phase angles and 3 amplitudes. Each symbol conveys 4 bits (quadbits). Signaling rate is 600 symbols per second.
1200 bps (V.22 and Bell 212A) - Differential Phase Shift Keying (DPSK): 4 possible symbols of 1 of 4 phase angles. Each symbol conveys 2 bits (dibits). Signaling rate is 600 symbols per second.
300 bps (V.21 and Bell 103) - Frequency Shift Keying (FSK): One bits and zero bits are assigned specific frequencies in transmit and receive directions. Signaling rate equals bit rate.

Voice Features

Enhanced ADPCM compression/decompression
Tone detection/generation and call discrimination
Concurrent DTMF detection
Line current sensing
Attached handset can be used as input/output device

Call Progress Monitoring Features

Wait for dial tone before dialing (sends NO DIALTONE code)
Detect busy (sends BUSY result code)
Wait for silence after answer
Call routing features (Adaptive Answer)
Speaker with adjustable volume

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