Multitech ISI9234HPCIE Benutzerhandbuch
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.
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.
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.
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.
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.
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.
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.
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.
MultiModem
®
ISI ISI9234HPCIE Server Card User Guide
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