IMACS LD-SRU Card

Overview

The LD-SRU card allows connection of up to ten (10) RS-232, low speed and medium speed data terminals to the IMACS. The functionality of the  LD-SRU card (822570) includes the capability to deliver the low delay throughput. The maximum of 3 ms +/- 10% end to end of rates 9.6Kbps or higher for sync and the maximum of 6 ms +/-10% end to end of rates 9.6Kbps or higher for async.

A number of those devices can be multiplexed onto a single DS0 time slot of a WAN card. The card ports can also bemultiplexed with voice traffic on an ADPCM card. Each port of the LD-SRU card receives timing from either the external DTE or the IMACS.

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Specifications

Key Features
  • Enables connectivity to low speed V24/V28 (RS232) based devices.
  • V24/V28 (RS232) ports can be independently programmed for synchronous or asynchronous
    operation.
  • Low delay for mission critical applications.
  • Integral testing capabilities include extensive Bit Error Rate Test (BERT) and loopback options on a per port basis.
  • High port density for maximum peripheral connectivity.
  • Supports industry standard subrate multiplexing schemes including DS0-A, DS0-B
Dimensions
  • 8″ x 7.5″, 20cm x 18.75 cm
Weight
  • .75 pounds, .34 kilograms
Power
  • 1.6 Watts, 5.46 BTU/hr
Interfaces
  • Ten RJ-45 ports
Standards

BellCore GR-63-CORE Issue 1, AT&T TR54075, ITU V.24, V.28, X.50, V.14, EIA RS232-C, UL 1950, CEN EN
500 81-1, EN 500 082-1, EN 60 950/A2

Environmental
  • Operating temperature 0 to 50 C, 32 to 122 F
  • Storage temperature -20 to 80 C, -4 to 176 F
  • Humidity 0 to 95% humidity, non-condensing
Geek Specs
  • Frame: a, b, Hlink, ADPCM
  • Interface: async, sync, v.14
  • Interface Connector RJ – 45 Electrical Interface
    RS-232E +/- 12.0V, 3K < Ohms < 7K
  • Character Format: 8/7/6/5 bit data, 2/1 stop bit, none/even/odd parity
  • Throughput Delay: Maximum of 3 ms +/- 10 % end to end of rates 9.6 kbps or higher for sync.
  • Maximum of 6 ms +/- 10 % end to end of rates 9.6 kbps or higher for async.
  • Majority Voting: Only for “a” frame.
  • Loopback: Supports CSU, DSU, and OCU.
  • Communication Configuration:
    • CTS – off, perm, local – 0, 30, 60, 100 ms, remote – 0, 30, 60, 100 ms.
    • Tx Clock – int, ext.
  • BERT: mark, space, 1:1, 1:7, 511, 2047.
  • Control: Configuration control via local terminal or remote NMS
  • LD-SRU Rates (kbps):
    • a frame:
      • sync 2.4, 4.8, 9.6, 19.2, 28.8, 38.4
      • async 0.3, 1.2, 2.4, 4.8, 9.6, 14.4, 19.2, 28.8, 38.4
      • v.14 0.3, 1.2, 2.4, 4.8, 9.6, 14.4, 19.2, 28.8, 38.4
    • b-5* frame
      • sync 2.4, 4.8, 9.6, 19.2, 28.8, 38.4
      • async 0.3, 1.2, 2.4, 4.8, 9.6, 14.4, 19.2, 28.8, 38.4
      • v.14 0.3, 1.2, 2.4, 4.8, 9.6, 14.4, 19.2, 28.8, 38.4
    • Hlink frame
      • sync 2.4, 4.8, 9.6, 14.4
      • async 0.3, 1.2, 2.4, 4.8, 9.6, 14
    • ADPCM Frame
      • sync 2.4, 4.8, 9.6, 14.4
      • async 0.3, 1.2, 2.4, 4.8, 9.6, 14

* b5 mode supported only when using ports 1 through 5, or 6 through 10. B-10 and B-20 modes are not supported.

Ordering Information

Model
Description
PRM-822570
IMACS, LOW DELAY SRU, 10 PORT
8000-LDSRU-10P
IMACS 8000, LOW DELAY SRU, 10 PORT