Multitech ISI9234HPCIE manual Product Overview, ISI Server Cards, ISI Modems, AT Commands

PRODUCT OVERVIEW

Product Overview

Product Overview

The MultiModem ISI server cards and modems provide four built-in V.92/56K modems on an industry-standard PCI Express x1 architecture for analog dial-up or dedicated fax servers. It also offers V.34/33.6K Super G3 fax and Error Correction Mode to reduce fax transmission time.

ISI Server Cards

The ISI9234HPCIE is a server modem expansion card that uses the PCI Express x1 architecture with four V.92 data/Super G3 fax modems. It allows you to add modems to communication servers and async host that have 32- bit PCI bus architecture.

The ISI9234HPCIE has one RJ-45 connector that fans out to four RJ-11 connectors, one for each modem. The half size card supports a high-speed interface up to 230 Kbps.

ISI Modems

ISI modems are compatible with the ITU-T V.92 protocol. They operate with downstream transmission speeds up to 56 Kbps and upstream speeds up to 48 Kbps when connected to a V.92-compatible Internet service. The V.92 protocol sends data downstream at these speeds because data on the phone network is converted from digital to analog only once before it reaches your modem.

Transmissions upstream and between client modems are limited to 33.6 Kbps. Downstream transmissions that are converted more than once are also limited to 33.6 Kbps.

When calling an ISI modem with another V.92 modem over an analog phone line, the maximum speed is 33.6 Kbps. V.90 and V.92 connections are not possible when an analog line calls another analog line. When an ISI modem connects an analog line to a digital line, the higher V.90/V.92 speeds are not available. If dialing a digital line that supports V.90/V.92, the ISI modems can achieve the higher V.90/V.92 speeds.

Note: Line impairments, public phone infrastructure, and other external technological factors may prevent connections from reaching the maximum 56 Kbps speed.

AT Commands

Use AT Commands to configure your ISI modems. In standard mode, store up to three command lines or phone numbers of up to 40 characters each in nonvolatile memory. Modems can be set to support pulse and tone dialing and can detect AT&T calling card tone. You can also configure for call progress detection, DTR dialing, remote configuration, callback security, and limited TAM functions.