Data Sheet Access-T Multi-Port Network Access CSU/DSUs Combining the features of a multiplexer, a DSU, APPLICATIONS and a CSU, the Access-T family of products let you leverage the full benefits of today’s full and • LAN interconnection fractional T1 services. . . while consolidating • Graphics and image transmission your architecture. At the same time, Access-T helps simplify network management by • Video teleconferencing providing centralized configuration, • High-speed terminal-to-host connections performance monitoring, and diagnostics • Data and voice integration through a menu-driven terminal interface, plus SNMP. BENEFITS Access-T is ideal for networking sites, multiplexing two high-speed serial data ports. • SNMP management via integral agent Additionally, it offers an optional drop-and- insert (add/drop) T1 port for integrating voice • More efficient use of T1/FT1 bandwidth and access and data. lines • Centralized and local configuration, monitoring, By multiplexing applications onto one access and diagnostics line, with one access device, the Access-T greatly reduces network and equipment costs. • Consolidation of network access devices, Because your applications can be separately simplifying installation and management routed using fractional T1 services, or can share • Rapid trouble notification, isolation, and recovery full and fractional T1 bandwidth for point-to- point connections, Access-T eliminates the high costs and wasted bandwidth of using a full T1 for each application. Finally, Access-T’s advanced performance management cuts maintenance costs while maximizing uptime. In the application shown above, the Access-T provides cost-effective point-to-point connections across a T1 network. Among the advantages Access-T offers are economical add/drop network access for point-to-point T1 and FT1 applications, the ability to extend a network with tail circuits, and integral SNMP management. SPECIFICATIONS MANAGEMENT FEATURES Terminal Interface — Menu-driven, VT100 or TV 925 Optional Drop-and-Insert Port — Simplifies network ASCII terminal, to 9600 baud architecture by integrating voice and data traffic on a single T1 or Ft1 connection SNMP Interface — RS232 (SLIP/PPP); DS1 MIB (RFC 1406) High-Density Installations — Chain up to 30 Access-T units together and manage them over a single Chain Management — Up to 30 units can be chained connection together and centrally managed Management — Terminal/PC interface with local and Performance Monitoring — Per AT&T Pub 54016, ANSI remote access; integral SNMP; advanced performance T1.403, RFC 1406 monitoring and diagnostics 24-Hour Registers — Per AT&T Pub 54016 (1989), plus BPVs; separate sets for network and T1 DTE One-Second Reports — Per ANSI T1.403 INTERFACES Network — T1 network and T1 drop-and-insert ports Alarm Reporting — Automatic dialout on user-specified alarms (Hayes-compatible dialer) Rate — 1.544 Mbps ±50 ppm Framing — D4 or ESF Loopbacks — Per AT&T Pubs 62411 and 54016 (Issue 2), ANSI T1.403, and CCITT V.54; plus DTE and Line Coding — AMI or B8ZS aggregate loopbacks. Electrical — Per AT&T Pub 62411 Test Pattern — QRSS, channelized or transmitted over Surge Protection — 1000 V pulse per AT&T Pub 43602; full T1; monitored for bit errors cross-voltage protection per Ul1459 (Issue 2) Connector — RJ48 Data Ports — Two: V.35, EIA530, or RS449 GENERAL Interface Type — EIA 530; DB25S connector Power — -48 V dc office battery (-43 to -53 V dc); standard Data Rates — Nx56 kbps or Nx64 kbps, to 1.536 Mbps (N 115 V ac, 50 to 60 Hz = 1 to 24 ) Dimensions — (H x W x D) 1.75 x 17 x 12 inches; 4.4x 43.2 Clocking — Internal, DTE port, line, aux, or station (TTL x 30.5 cm 50 ohms, BNC) Environment — 0 to 50 ºC (32 to 122 ºF) ambient; up to Channel Multiplexing — 1 to 24 DS0s; contiguous, 95% relative humidity, non-condensing alternate, or user-defined DS0 bundling Regulatory Compliance — FCC Parts 15 & 68; UL 1459 Management Ports — Front- and rear-panel RS232 ports; (Issue 2) AT&T ASDS®® and Accunet T1.5 rear-panel RS485 chain port HEADQUARTERS 39745 Eureka Drive Newark, CA 94560 USA toll free: 1 (888) LARSCOM tel: (510) 492-0800 fax: (510) 492-0808 sales@larscom.com Access-T is a registered trademark of Larscom Incorporated. Other trademarks are the property of their respective owners. Copyright 2003 by Larscom Incorporated. All rights reserved. Specifications subject to change without notice. Larscom is ISO 9001 certified. www.larscom.com ML02-L27-02, August 2003. Printed in USA.