Data transported on the T1 Links is transparent and protocol independent.

• VCL-SafeComm, 16 T1 Links (48 T1 Ports), 1+1 Automatic Protection Switching Equipment - Data Sheet (.PDF)

Application Note: 8/16 E1/T1 Links (24/48 E1/T1 Ports), 1+1 Automatic Protection Switching Equipment: This equipment is to be used when the customer wants to use two different E1/T1 links of the network to establish a 1+1 redundant path to ensure continued E1/T1 service bewteen two points even if one of the network E1/T1 link fails. Example - the customer may want to use E1/T1 Optical Fiber and an E1/T1 Radio link and to provide an ACTIVE and a STANDBY link between a BSC and a BTS so that when the E1/T1 Optical Fiber (ACTIVE) link goes down the STANBY / REDUNDANT E1/T1 Radio link automatically  gets connected to provide continued connectivity and service between the BSC and the BTS.

Application Note: The E1/T1 Fail-Over Switch should be used when the customer is using a single E1/T1 link to provide protection equipment to the customers premises by using one E1/T1 ACTIVE and one E1/T1 STANDBY equipment (such as a ROUTER or a PBX). The E1/T1 Failover Switch shall automatically switch the E1/T1 that is being received from the telephone company between the ACTIVE E1/T1 equipment and the STANDBY E1/T1 equipment. Should the ACTIVE E1/T1 equipment go bad or be removed from service, the E1/T1 link from the telephone company automatically gets switched to the STANDBY E1/T1 equipment without any customer or user intervention.

Applications:

Providing 1+1 alternate paths between any two Transmission mediums (active+standby). e.g:

• Fiber/Fiber
• Radio/Fiber
• Radio/HDSL
• Fiber/HDSL etc.

Example: The user may deploy the VCL-SafeComm, 16 T1, 1+1 Automatic Protection Switching Equipment to provide an alternate communication route between an optical fiber link and a radio link between any two points. In the event of the failure of the primary (optical fiber) link the T1 is automatically switched to the alternate route over the T1 radio, thus ensuring maximum uptime on all such 1+1 protected T1 Links.

Once the primary (optical fiber) T1 Link on the optical fiber is restored, the VCL-SafeComm, 16 T1, 1+1 Automatic Protection Switching Equipment automatically restores the communication to the primary (optical fiber) T1 Link. The switching and restoration criterion is user programmable.

Applications Diagrams:

Features & Highlights:

• High density protection switching equipment (upto 16 T1 Links i.e. 48 T1 Ports)
• To provide an independent point-to-point, protected T1 Link between two "T1 USER PORTS" on similar (example fiber-fiber), or dissimilar (fiber-radio) mediums
• To provide 1+1 T1 redundancy support to higher order multiplexers e.g. E2, E3
• System configuration and management interface through "CLI" text based commands
• Transport A-bis Interface on redundant T1 links
• Provide 1+1 Protection Routing / Path between BSC and BTS
• These ensure that mission critical voice, data, control and management traffic are properly supported and maintained even during T1 backhaul facility outages. When the primary (working) link fails, the T1 traffic is automatically switched to the standby (secondary) link to ensure maximum uptime
• Through the comprehensive remote configuration and alarm management capabilities of the VCL-SafeComm, 16 T1, 1+1 Automatic Protection Switching Equipment the product may be used to improve network reliability and control
• Traffic Protection
• Alternate Facility Advantages
• Service Differentiation Agreements
• Increased Network Reliability Resilience
• Media and Path Diversity
• Remote Management
• Alarm logging and monitoring.

Salient Feature:

• One of the salient features of the VCL-SafeComm 1+1 Protection Switch is that it does not "add" a point-of-failure to the T1 network. In the event that the power to the VCL-SafeComm 1+1 Protection Switch (or the equipment itself) fails, the T1 link connectivity shall be "always" maintained."

Benefits:

• Customer Relations
• Competitive
• Service Level
• Back-haul Network
• Technology Migration
• User Programmable 1+1 Protection Parameters:

a) Loss of Signal
b) AIS (All Ones Alarm)

Technical Specifications:

T1 Interface

Clock

Transparent between the two points of the T1 Links.

• Serial Management Port (RS232) - COM Port
• 10/100 BaseT for Remote Management over a LAN
• 10/100 BaseT Telnet over a TCP-IP Network

• Meets CE requirements
• Complies with FCC, Part 68 and Part 15 subpart A specifications
• Safety - UL 1459 Issue 2

Command Language

Command Line Interface (English text commands)

Alarm Contact Closures

1 Alarm Relay,
Type - Form "C" relay

Temperature

Operating 0⁰C to 50⁰C
Humidity 5% to 95% non-condensing

AC Power Supply Specifications

DC Power Supply Specifications