Excalibur® Multiport DAP
Digital Access Product

Technical Specifications

product photo

  • Six-channel point-to-point TDM
  • Multiport/multidrop operation option
  • Non-interruptive secondary channel
  • SNMP or Milgo's proprietary management protocol
  • Custom SNMP management application
  • TELNET client support
  • Analog, Switched 56, or ISDN dial backup options
  • Built-in port sharing with multiple shared groups
  • Mixed protocols on a single line

The Excalibur® Multiport Digital Access Product (DAP) is designed to reduce the number of digital lines and DSU/CSUs needed in your network. Point-to-point and multiport/multidrop models are offered.

Point-to-Point Multiplexing
The Excalibur Multiport DAP operates on point-to-point Dataphone Digital Service (DDS) or Clear Channel 64 Kbps lines with channel rates of 9.6 to 64 Kbps. It can also operate over customer owned copper wire for short-haul point-to-point limited distance communications. Each DAP supports up to six ports. The point-to-point multiport DAP operates in a constant carrier point-to-point mode with an available aggregate data channel bandwidth of 8.4 to 57.6 Kbps.

Multiport/Multidrop Operation
The multiport/multidrop DAP allows you to run up to six different protocols over one multidrop digital circuit with no interaction between the ports or protocols. Milgo supplies a multiport/multidrop DAP that electronically appears as if it were running on six separate multidrop lines. Using this technology, it is possible to run six protocols from six different locations over one multidrop circuit. When a remote drop is added, the central DAP automatically brings the unit on-line. An Excalibur Multirate DAP may be a participant when only one port is required at a location. Milgo's patented multiport/multidrop technique does not add any delays to the network, nor does it allow response time from one host to affect response time from another host. The unit operates on multipoint DDS and Clear Channel 64 Kbps lines. 

SNMP or Proprietary Management Protocol
Excalibur Multiport DAPs can be fully managed via SNMP (point-to-point only) or via Milgo's proprietary T7 management protocol. The integral MIB-II compliant SNMP agent provides a standards-based management interface, which allows you to manage your complete network via SNMP from a CMS® manager or a generic SNMP manager. The extended MIB includes all functionality found in T7. The multiport/multidrop model and the analog dial backup option are not offered with SNMP. Full TELNET client support is included with SNMP. 

Custom SNMP Management Application
To simplify management, Milgo offers a custom SNMP management application that runs on the CMS 400 platform.  This application provides an intuitive graphical interface specifically tailored for the Excalibur DAP.  You can use this application to fully configure the DAP, monitor its performance, view extended network-wide statistics, and integrate traps. 

Multiple Groups of Shared Ports
Designed with built-in port sharing, the units can operate with asynchronous or synchronous terminals on a port-by-port or shared group basis. Up to three groups of shared ports can be configured or all six ports can be configured in one shared group. This feature provides capabilities such as a central unit sending three separate applications to remote units with three sets of shared ports or one application to remote units with six ports in one shared group. This feature can significantly reduce your communication costs by eliminating the need for external modem sharing or port sharing devices. 

Multi-Interface
The Excalibur Multiport DAP provides a V.35 interface connection in addition to the standard EIA-232-E connection on Port 1. Simply connect the V.35 adapter cable to Port 1 and change a jumper setting on the Multiport printed circuit board. 

Dial Backup Options
In the event your digital lines go down, the Excalibur Multiport DAP offers dial backup options.  Whether you choose analog lines, Switched 56, or ISDN backup, this option can keep your operation up and running.  The dial backup connections can be established automatically or manually.

Typical Multiport/Multidrop Application


Excalibur® Multiport DAP Technical Specifications

Line Requirements Operates over all Digital Type 1 services and Clear Channel 64 Kbps services; can also operate over customer owned copper wire.
Network Configurations Point-to-point, multipoint
DTE Speeds Synchronous: 1.2 to 52.8 Kbps in multiples of 1200 bps (3.6 and 6 Kbps are not provided)
Asynchronous: 75, 150, 300, 600 bps and 1.2 to 52.8 Kbps in multiples of 1200 bps (3.6 and 6 Kbps are not provided)
DDS Channel Rates 9.6, 19.2, 56, and 64 Kbps
Aggregate Channel Bandwidth 8.4, 18.0, 52.8, and 57.6 Kbps
DTE Interface 26-pin ultra-miniature EIA-232-E Alternate A connectors, V.35 option on Port 1
Channel Interface 8-position modular jack RJ-48S, AT&T standard
CMS Interface 10-position modular jack (T7)
SNMP Interface 10-position modular jack, synchronous or asynchronous PPP interface at rates of 2.4, 4.8, 9.6, and 19.2 Kbps
Receiver Sensitivity 0 to 40 dB loss minimum up to -45 dB dependent on the service
Bandwidth Allocation Reserved (TDM), shared (port sharing), or mixed
Clocking Internal, external, and slave
Approvals FCC Part 15 and Part 68, Industry Canada, Bell Canada, UL approved
Power Supply External, 92-127 VAC, 55-65 Hz
Physical Specifications Height: 3 inches (7.6 cm)
Width: 8 inches (20.3 cm)
Depth:12 inches (30.5 cm)
Environmental Operating temperature: 32° to 122° F (0° to 50° C)
Storage temperature: - 40° to 158° F (- 40° to 70° C)
Humidity: 10% to 95%, noncondensing

Our policy of continuous development may cause the information and specifications contained herein to change without notice.

CMS and Excalibur are registered trademarks of Milgo Solutions. All other logos and product names are trademarks or registered trademarks of their respective companies.

©1999 Milgo Solutions. All rights reserved. Printed in U.S.A. 3C1005 - 5/99



Copyright © 1999 - All rights reserved.

Last Modified: May 1, 1999