| DSU-CSU Router with PPP |
The DCB PPP-SR-DSU replaces a DSU, router and Ethernet network interface card (NIC)
at remote locations for one to four PC's connecting to a corporate network or
Internet service provider. The PPP-SR-DSU allows computers using async dial PPP
programs to connect on a permanent private line link.
|
The DCB PPP-SR-DSU replaces a DSU, router and Ethernet
network interface card (NIC) at remote locations for one to four PC's connecting
to a corporate network or Internet service provider. The PPP-SR-DSU allows
computers using async dial PPP programs (Windows Dial Up Networking, Chameleon,
Spry etc.) to connect on a permanent private line link.
The DCB PPP-SR-DSU is a 56/64 Kbps synchronous DSU/CSU with one or four
asynchronous ports and synchronous PPP or frame relay translation. The PPP-SR-DSU
translates the synchronous protocols from the host router to asynchronous PPP
and passes that to the async com ports of the remote PC's.
The unit is also available without the internal DSU, designated as the PPP-SR-01
one port unit and the PPP-SR-04 four port unit. Without the internal DSU, the
PPP-SR can be connected to ISDN terminal adapters or fractional T1 channels at
speeds up to 128 Kbps.
The PPP-SR-DSU negotiates the link with the computer and router as follows:
1. The PPP-SR-DSU responds to the computer's AT modem
commands with the appropriate "OK" and "CONNECT" responses.
2. The PPP-SR-DSU presents "Login:" and "Password:" prompts as required by
most async PPP dialing programs, and expects a carriage return response.
3. The PC then negotiates the Local Control Protocol (LCP) and the IP Control
Protocol (IPCP). After the negotiation is completed, the PC is on line.
The PPP-SR-DSU is easy to install and operate. Controls on
the unit include the loopback push button, a switch to select line driver or
phone company clock and a separate management/setup port. The Setup switch is
used to access the management port from the user's PC port. The minimum number
of controls and comprehensive indicators make installation and troubleshooting
easy. Diagnostic aids built into the PPP-SR-DSU include LED indicators and
loopback capabilities.
The hardware cost savings provide a compelling reason to use the PPP-SR-DSU. It
is especially cost effective where a number of PPP synchronous digital channels
are delivered to the phone company via DS-0's and T1 access multiplexing, or via
frame relay. The PPP-SR-DSU is a very cost effective alternative to ISDN. In
many areas, phone companies charge ISDN users per minute usage rates. At the end
of month, ISDN charges for even 8am to 5pm operation weekdays can total hundreds
of dollars. A dedicated link using the PPP-SR-DSU is often the more cost
effective alternative.
.
Rates: 56/64 Kbps synchronous (64 Kbps DSU to ship 9/97)
Async port rates to 57,600 bps
Application: Point-to-point
Facility: 56/64 Kbps Dataphone Digital Service (DDS) or equivalent, Line driver mode for customer owned 4-wire circuit. Supports frame relay at 56/64 Kbps
Power, Activity, Line Error, Modem Ready, Port 1 Setup, Loopback
DSU Led's: TxD, RxD, RTS, CTS, DCD, Test
Front panel push button for loopback
Side door accessible firmware cartridge for installing firmware upgrades
Rear panel switches for master or slave clock, RTS forced on or DTE controlled
Responds to telco current reversal loopback and non-latching pattern loopback.
Setup via the "Port One Setup" or via the rear panel setup port
Interface: DDS bipolar return to zero
Connector: 8-wire RJ-48S
Interface: RS-232, V.24, speeds up to 57,600 bps
Connector: RJ-45 per EIA/TIA 561 pin outs
Power requirements: 120 VAC,
60 Hz, 18 Watts
10 1/4" x 9 3/4" x 2 1/4"
One pound
| PPP-SR01-DSU | PPP-SR01 with internal DSU |
| PPP-SR01 | Sync to Async PPP Translator, uses external DSU, ISDN Terminal Adapter or channel bank port |
| PPP-SR04-DSU | PPP-SR04 with internal DSU |
| PPP-SR04 | Sync to Async PPP Translator, uses external DSU, ISDN Terminal Adapter or channel bank port |
see other DSU CSU pages
ARC ELECTRONICS
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