Excalibur® ISXTM 5312/5314
T-1/E-1 Multiplexers with SNMP

Technical Specifications

Product photo

  • Full and fractional T-1/ E-1 compatibility
  • Two or four N by 56/64 Kbps DTE ports (64 Kbps only for E-1 models)
  • Integral drop-and-insert capability
  • Protection switching capability
  • T-1/E-1 circuit performance monitoring
  • External dial backup
  • SNMP management via direct Ethernet (10Base-T) port connection
  • Custom management application available for CMS® 400
  • Telnet client support
  • Flash memory for field upgrades

Milgo offers Excalibur® ISXTM; (Integrated Services Express) 5312 and 5314 intelligent T-1 and E-1 multiplexers in a variety of models to meet your specific network requirements. The ISX 5312 provides two DTE ports and the ISX 5314 provides four ports, allowing you to run more data applications on one unit. For maximum application flexibility, the DTE ports each support N by 56 or N by 64 Kbps applications (64 Kbps only for E-1 models).

The ISX 5312/5314 is available with one or two T-1/E-1 network interfaces. It includes an asynchronous PPP/SLIP and an Ethernet (10Base-T) SNMP interface. The Ethernet interface provides a direct connection to the LAN for SNMP management purposes. With a direct LAN connection, you save the expense of dedicating an expensive router port or providing an additional LAN server to route your SNMP traffic. You can also select Milgo's proprietary management protocol for management by CMS™ 400.

Application Flexibility
The ISX 5312/5314 is designed to transport LAN, PBX, voice, ISX 5010 subrate multiplexer, and other data applications over a full or fractional T-1/E-1 link.

Fractional T-1/E-1 services, as tariffed, allow you to purchase bandwidth in 64 Kbps increments instead of purchasing a full T-1 (1.544 MHz) or E-1 (2.048 MHz) circuit. You pay only for the bandwidth you need.

The ISX 5312/5314 also operates as a Digital Access Cross-Connect System (DACS) for "groom and fill" functionality. This feature enables maximum utilization of available bandwidth in dynamic network environments. Depending on the model selected, up to five separate applications with underutilized bandwidth (e.g., PBX, channel bank, video, and LAN) can be easily routed to one ISX 5312/5314 T-1/E-1 circuit. This eliminates the need for four fractional T-1/E-1 circuits.

Protection Switching
Integral protection switching capabilities automate restoral of T-1/E-1 networks. In the event the primary link fails, the timeslots or DS0s assigned to the primary link can be automatically switched to a backup link.

Simple Network Management Protocol (SNMP) Provided
The ISX 5312/5314 can be fully managed via SNMP. The integral MIB-II-compliant SNMP agent provides a standards-based management interface, allowing you to manage your entire network with any SNMP-based management application. Full Telnet client support is also included.

In addition, an optional Windows™-based front panel emulation software package is available. This package provides another management access method should you not have access to an SNMP application.

ISX 5300 Manager Offers Custom Graphical Interface for Simplified Management
To simplify network management, Milgo offers the ISX 5300 Manager for CMS® 400. This SNMP-based application provides an intuitive graphical interface tailored specifically for ISX 5300/5310 series products. You can use this application to configure the ISX 5312/5314, monitor its performance, display statistics, and conduct tests, without having to send individual Set and Get commands.

Telnet Client Support Aids Remote Troubleshooting
By using the industry-standard Telnet protocol, the ISX 5312/5314 can be accessed from anywhere on the network by any workstation that has a TCP/IP stack and a Telnet application. This capability is particularly valuable for troubleshooting. A technician can monitor operation and initiate diagnostics. In addition, a password routine prevents unauthorized access.

Fast and Easy Fault Isolation
Extensive diagnostic testing capability helps quickly isolate the source of network malfunctions. The ISX 5312/5314 allows you to perform CSU loopbacks, local and remote DTE digital loopbacks, and bidirectional local channel and local link loopbacks.

Single, contiguous, or all channels on a T-1/E-1 link can be looped. In addition, all channels assigned to two T-1/E-1 links in a connection can be looped. All models provide a built-in QRSS test pattern generator. The E-1 models also provide a PRBS test pattern generator. The generators eliminate the need for separate BERT test equipment.

The ISX 5312/5314 provides circuit performance monitoring without interrupting normal operation. A variety of alarm conditions can be viewed from the front panel or the CMS management system. Providing efficient problem tracking, alarms are recorded for later inspection.

Channel Signaling
For E-1 models, you can select timeslot 16 to provide Channel Associated Signaling (CAS) format, or you can use it as an additional data channel. When used for signaling, the ISX 5312/5314 generates the appropriate framing format. E-1 models also support unstructured framing format, which allows you to use all 2.048 Mbps for data.

Application Drawing

Typical ISX 5312/5314 Application

The ISX 5312/5314 facilitates the connection of routers and other high-speed DTE equipment to Telco/PTO facilities, while providing advanced features and capabilities beyond those found in traditional multiplexers. The second network interface can be used as a second local interface. Because neither the PBX nor the data application requires a full T-1/E-1 bandwidth, the ISX 5312/5314 allows both applications to be supported via a single network, providing maximum utilization of available bandwidth.

Application Drawing

Single-Ended E-1 Application

A central site ISX 5312/5314 E-1 combines multiple data and voice applications for transport via a single E-1 circuit. The PTO/PTT splits the E-1 bandwidth and delivers each segment to the appropriate remote location. This ability reduces the number of circuits required at the central site.

Application Drawing

Protection Switching Application

Access Protection Capability (APC) for T-1 models - Accunet's T1.5 APC service function provides the automatic transfer between two Accunet T1.5 access facilities when one T-1 line fails.

Hot Spare - The ISX 5312/5314 provides the automatic transfer to a backup T-1/E-1 line when the primary T-1/E-1 line fails, or from the backup line to the primary line when the primary line returns to good state.


Excalibur™ ISX 5312/5314 Technical Specifications

Line Rate T-1: 1.544 MHz + 50 Hz
E-1: 2.048 MHz + 50 ppm
Network Interface Compatibility T-1: AT&T 62411, 54016, 54017A1, ANSI T1.403, and TR- NLP- 000054
E-1: CTR 12 2M unstructured, CTR 13 2M structured, G.703, G.704
Format T-1: Super Frame (SF) or Extended Super Frame (ESF)
E-1: Basic FAS, 16 frame CRC-4 multiframe structure, unstructured
Line Coding T-1: AMI or B8ZS
E-1: AMI or HDB3
Clock Source Internal, recovered line clock (CSU), external DTE clock
One's Density T-1: B8ZS, AMI (none), AMIB7, AMIZS (zero suppression)
E-1: AMI (none), HDB3
Channel Interface Compatibility Two or four V.35 port
Data Rates T-1: N x 56 Kbps and N x 64 Kbps, where N = 1 to 24
E-1: N x 64 Kbps, where N = 1 to 30 (N = 1 to 31 when signaling is disabled)
Bundling Independently selectable, alternate, or contiguous
Clocks Transmit and receive bit clocks
Management Interfaces NMI Interface 10-position modular jack, 75 bps - 19.2 Kbps
SNMP Interface 10-position modular jack, asynchronous PPP/SLIP interface at rates from 75 bps to 19.2 Kbps and RJ45 (10Base-T) COM port interface
Distance T-1: 3000 feet (915 meters) with 22-AWG twisted-pair cable. Up to 6000 feet (1830 meters) in LDM mode
E-1: 1148 feet (350 meters) with 22-AWG twisted-pair cable
Tests T-1: Line loopback; payload loopback; PN127 loopback; multiplexer, DTE, link, and channel loopbacks; link and DTE QRSS pattern tests
E-1: PN127 loopback; multiplexer, DTE, link, and channel loopbacks; link and DTE QRSS and PRBS pattern tests
Network Diagnostics T-1: ESF diagnostics, 24-hour registers, and 1-second reports per ANSI T1.403 and AT&T 54016
E-1: Local 24-hour registers
Error Statistics Percentage of line availability, Errored Seconds (ES), Controlled Slip Seconds (CSS), Loss of Frame Count (LOFC), CRC-4 (T-1) or CRC-6 (E-1) Errors, Bipolar Violations (BPV), Frame Bit Error (FBE), Change of Frame Alignment (COFA), Severely Errored Seconds (SES), Bursty Errored Seconds (BES)
Approvals T-1: FCC Part 15 and Part 68, Industry Canada, CSA, UL approved
E-1: EN60950, EN41003, IEC 950, TS001, EN550022B (Class A), EN550082-1, EN61000-3-2, AS3548-1, and CE approved
Physical Specifications Height: 3 inches (7.6 cm)
Width: 8 inches (20.3 cm)
Depth: 12 inches (30.5 cm)

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

Excalibur and CMS are registered trademarks and ISX is a trademark 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. -- 3C1570 - 02/99


Copyright © 1999 - All rights reserved.
Last Modified: August 2, 1999