Features / Benefits
* Interface - EIA RS-232, CCITT V.24, DB-25 Female Connectors
* Data Rates - Synchronous or Asynchronous up to 64Kbps
* Anti-Streaming - Automatic or Manual for unattended Circuit Restoral
* Individual Subchannel
Enable/ Disable Switches
* Visual Indication of Subchannel Activity
* Receive Data - Broadcast to all Subchannels
* Transparent to Data
* Fully Cascadable
* External Clocking
* Sturdy Metal Enclosure
* 110/220VAC Switch Selectable
* +/- 15KV ESD Protection
Description
The MSD-4, PT# 101012 RS-232 Modem Sharing Device provides the network manager with a cost effective means of expanding existing, leased line polled networks without adding computer ports or communications links. With the MSD-4, up to four terminals can share the same port and communications link using the contention and control protocols normally resident in the host hardware and software. Once installed, system and network efficiency are increased through higher host processor utilization coupled with the significant decrease in idle time between host / terminal traffic sessions.
Ideal for either synchronous or asynchronous network environments, the MSD-4 is protocol transparent at data rates up to 128Kbps. Data arriving at the Master Port is continually broadcast to all Subchannels. The attached terminal device that raises the RTS control signal is automatically given control of the MSD until data transmission is complete. Clocking is accomplished from the attached Modem.
The MSD-4 incorporates optional Anti-Streaming circuitry. If enabled, Anti-Streaming will automatically remove a defective terminal from service if the Data / Control criteria is present for the user predefined selection period.
Housed in a sturdy metal enclosure and equipped with an internal
110/220VAC switch selectable linear power supply, the MSD-4 will provide in excess of 100,000 hours of reliable service.
The MSD-4 have a 3-year warranty and a 24 hour turnaround on warranty repairs.
SPECIFICATIONS |
|
| Application |
Multiple sync/async terminal or DTE devices operating in a polled environment, to share one Modem |
| Capacity | One to four RS-232 Sync/Async devices |
| Interface |
EIA RS-232, CCITT V.24 using DB-25 female connectors
|
| Data Rates | Up to 64Kbps |
| Data Format |
Data transparent at all data rates |
| Timing |
External; from attached Modem |
| Handshaking |
RTS / CTS |
| Anti-Streaming | Automatic…Selectable time out intervals Disable……Selectable via dip switch |
| Terminal Service Modes | Rotational sequence for equal access Priority Mode Optional |
| Front Panel |
Indicators: Power, CTS, DCD, RXD, TXD |
| Power Source |
100-120 to 200-220VAC @10%, 50/60Hz, 0.16/0.08A, external 110/220 volt select switch, IEC Power Inlet, (2) 5mm Fuses |
| Dimensions |
MSD-4 PT# 101013
Height ....... 2.53 inches (6.426 CM)
Width ........ 12.13 inches (30.810 CM)
Length ....... 11.13 inches (28.270 CM)
MSD-4 PT# 101030
Height ....... 1.75 inches (6.426 CM)
Width ........ 17.00 inches (43.180 cm)
Length ....... 11.50 inches (29.210 CM)
|
| Weight |
6 pounds (2.72Kg) |
| Warranty | Three Years, Return to Factory |
| MTBF | 601,328 Hours Benign Ground, Controlled, Telcordia Issue 1 |
| Approvals | EMI Approvals FCC 47CFR, Part 15, Subpart B for conducted emissions from a Class A FCC 47CFR, Part 15, Subpart B for radiated emissions from a Class A |
| Safety Approvals | UL 62368-1: 2014 |
| Electric Discharge Approval | IEC EN-61000-4-2 |
| Environmental Testing Approvals | Operating Temperature: 50º to 160º F (10º to 60º C) Operational Alt.: 0 to 10,000 feet above sea level Operational Relative Humidity: 10% to 80% Non-Operational Temperature: -30 degC to 70 degC Non-Operational Alt.: 0 to 50,000 feet above sea level |
| Ordering Information |
PT# 101012 |
| Included with each unit: | 1) Operations Manual 2) U.S.A. Grounded Power Cord, Part # 713015 3) Optional Power Cords A) United Kingdom, Part # 713016 B) Continental Europe, Part # 713017 C) Other: Specify Country on Purchase Order |
| Optional Accessories | 1) Spare Data Center Fuses A) 160ma Fuse, Qty (2) Part # 714000 B) 80ma Fuse, Qty (2) Part # 714001 |