Home> 3Com USR Total Control Quad Modems

3Com USR Quad Modem: 3 Types of Quad Modems
4-port Digital Modem
4-port Quad Analog/Digital Modem
4-port Quad Analog Modem

Card set includes:
PN# 69-00790-00 Quad Digital Modem NAC
PN# 69-000828-00 Quad Digital NIC

PN# 69-000793-00 Quad Analog/Digital Modem NAC
PN# 69-000828-00 Quad Analog/Digital NIC

PN# 69-001005-00 Quad Analog Modem NAC
PN# 69-000828-00 Quad Analog NIC

Total Control Quad Modem Cards with v90 capabilites include four U.S. Robotics V.Everything®/v90 modems per card, including error correction, data compression, fax and optional cellular support. The Total Control Chassis is the only system available that supports all high-speed data transmission protocols including the v90, which is capable of speeds up to 56 Kbps. Rack mounted on a single chassis and managed from a single console, communications to and from the modem cards takes place via several high-speed buses over the mid-plane of the Total Control chassis. U.S. Robotics' suite of Quad Modem Cards supports connections to the PSTN via analog lines or digitally through Dual T1 or T1/PRI Application and Interface Cards. Typically, this data is directed from a Quad Modem Card to a Gateway Card, which then muliplexes the data onto an Ethernet, Token Ring or Frame Relay packet switched network. As an option, direct connections can be made via the Quad RS-232 Network Interface card.

Three modem types: The Total Control Enterprise Network Hub can be configured with specific modem types for different applications. Analog, digitial and analog/digital modems are available. Digital quad modems have the ability to utilize the digital PCM signal directly from the T1 or T1/PRI. This eliminates unnecessary multiple analog/digital conversions to minimize errors, connection times and costs. The dual mode analog/digital quad modems are capable of accepting either a digital or analog input signal from a T1 or the POTS (Plain Old Telephone System) to provide a solution for both forms of network access. All three modem types use U.S. Robotics state-of-the-art modem technology, and the digital and analog/digitial modem cards now support v90 Technology.

We Buy & Sell both Used & New TC1000 hardware
contact steverivera@wrca.net or Call 732-833-2111 x102
Fax available equipment to 732-833-2115 or email address above.