Digital trunk interface unit for use in remote access system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 6, 2000
Grant Date -
N/A
app pub date -
Apr 13, 1998
filing date -
Apr 24, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A digital trunk interface unit for interfacing with a digital trunk of a PSTN in the RAS for connecting the PSTN to a different network by a T1 or E1 trunk, comprises a plurality of line card slots; a plurality of E1 line cards inserted into the line card slots to provide an interface of an E1 trunk; a plurality of T1 line cards inserted into the line card slots to provide an interface of a T1 trunk; a digital switch; an R2 signaling part; a tone generator; a processor; a clock selector; a PLL; a frequency-divider; and a clock converter. Therefore, personal computers of the PSTN connected to the RAS by the trunk interface unit, can be connected to a packet network by a modem unit and a gateway, thereby being provided information services from information providers. Accordingly, the trunk interface unit of RAS can accommodate T1 and E1 trunk links within the same unit by exchanging only line cards, and process the line interface and signaling functions on the same unit, thereby implementing the RAS with low cost.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully