Excalibur® Multirate SET-1 DAP
Digital Access Product

Technical Specifications

Product Photo

  • Multimode (operates on any DDS service)
  • Multirate, 2.4 to 64 Kbps
  • SNMP or Milgo’s proprietary management protocol
  • TELNET client support
  • CMS® network management compatibility
  • Analog, Switched 56, or ISDN dial backup option
  • Line Quality Statistics
  • Rate adaption
  • Fully soft-strapped

The Excalibur® Multirate Single-Ended T-1 (SET-1) Digital Access Product (DAP) is designed to reduce the number of digital lines needed in your network. Housed in the high-density Excalibur Card Carrier chassis, central site SET-1 DAPs operate with an internal Excalibur T-1 CSU (Channel Service Unit). Data from up to 24 digital circuits can be transmitted over a single (full or fractional) T-1 link to the Telco, saving up to five times the cost of individual 56/64 Kbps circuits. The Telco demultiplexes the data and distributes it to remote DAPs via any digital data service, including Frame Relay, at rates of 2.4, 4.8, 9.6, 19.2, 56, and 64 Kbps.  The DAP's rate adaption feature provides additional speeds when operating on basic digital service with Milgo's non-interruptive secondary channel. This feature allows the port speed to be set at a lower rate than the DDS line.

Multimode Versatility
The Excalibur Multirate SET-1 DAP offers the versatility to change between services as your needs and tariffs change. Choose from several options:

Multiport/Multidrop Compatible
In multiport/multidrop applications, the multirate DAP can operate as a multidrop central or remote. The remote units must all be either Excalibur SET-1 DAPs or Excalibur DAPs. The two unit types cannot be mixed.

SNMP or Proprietary Management Protocol
Excalibur Multirate DAPs are available in models that can be fully managed via SNMP 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 feature and the analog dial backup option are not available for SNMP models. Full TELNET client support is included with SNMP.

Network Management Capability
For those networks that require comprehensive management, testing, and control features, the Excalibur Multirate SET-1 DAPs can operate with a CMS network management system. A CMS system provides sophisticated database management, performance analysis, fault isolation, and network restoral capabilities from a central location.

The Line Quality Statistics (LQS) feature allows you to precisely measure and graphically display the quality of a transmission line from your CMS console. This feature helps you identify specific digital line problems.

Control Unattended Remote Units
For leased line connections with the Excalibur Multirate SET-1 DAP, you can control unattended remote DAPs from the Excalibur Card Carrier control panel. By simply entering the remote DAP's address, you can perform operating procedures as if you were at that site.

Dial Backup Option
In the event your digital lines go down, the Excalibur Multirate SET-1 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.

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Typical Multirate SET-1 DAP Application


Excalibur Multirate SET-1 DAP Technical Specifications

T-1 Link Interface Internal Excalibur T-1 CSU
Network Configurations Point-to-point, multipoint
DDS Channel Rates 2.4, 4.8, 9.6, 19.2, 56, and 64 Kbps
DTE Speeds Synchronous: 1.2 to 52.8 Kbps in multiples of 1200 bps (except 3.6 and 6 Kbps are not provided) and 56, 57.6, 64 Kbps
Asynchronous: 75, 150, 300, 600 bps and 1.2, 2.4, 4.8, 7.2, 9.6, 12, 14.4, 16.8, 19.2, 24, 28.8, 48, and 57.6 Kbps
DTE Interface EIA-232-E, V.35
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
Port Clocking Internal, external, and slave
Dial Backup Options Connections: 2-wire 14.4 or 28.8 Kbps analog, 4-wire Switched 56 Kbps, or 2-wire Integrated Services Digital Network (ISDN).

14.4 Kbps analog dial backup operates in Programmable or Permissive mode, supports V.32 or V.32 bis+ (Milgo proprietary mode with non-interruptive secondary channel) format.

28.8 Kbps analog dial backup operates in Programmable or Permissive mode and provides V.34 modem support.

Switched 56 dial backup operates at 56 Kbps over MCI's Switched 56 Service, AT&T's Accunet Switched 56 Service, or Sprint's Enhanced Switched 56 Service.

ISDN dial backup operates at 56 or 64 Kbps over ISDN Basic Rate service. It complies with all applicable specifications, including National ISDN-1 standard, Northern Telecom Basic Rate Access, and AT&T Basic Rate Access. It can operate with another DAP equipped with Switched 56 dial backup, providing backup to locations where ISDN service is unavailable.

Environmental Operating Temperature: 32° to 122° F (0° to 50° C) 
Storage Temperature: -22° to 158° F  (-30° to 70° C)
Humidity: 85%, 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. 3C1248-5/99



Copyright © 1999 - All rights reserved.

Last Modified: October 6, 1999