STM SDH
63 E1 Add-Drop SDH Multiplexer

Features and Highlights

• Supports upto 63 E1s
• 1U height, 19-Inch standard rack-mountable chassis
• Performance Monitoring and Alarms - Error counts for B1, B2, B3
• Performance Analysis - Error Seconds (ES), Several Error Seconds (SES), Unavailable seconds (UAS), Higher Order Virtual Container - Remote Error Indication (HOVC-REI), Higher Order Virtual Container - Pointer Justification Event (HOVC-PJE)
• Supports 1+1 Line Protection and Automatic Protection Switching (APS) with less than 50ms recovery
• All 63 VC12s can be mapped (east or west) in 1+1 protection mode
• Out of 63 VC12s, 21 VC12s (43-63) can be mapped to either direction (east or west) without protection (1+0)
• Supports point-to-point, ring and chain topology
• Local management and network-based management via a unified platform
• Supports Remote Power Down Detection and Auto Laser Shutdown
• Supports STM-1 and E1 loop-back for troubleshooting
• 850nm multi-Mode, 1310nm Single Mode and 1550nm Single Mode optical interface options offered
• Easy to operate.

Service Interfaces

• 2 x STM-1 optical interfaces, MSA compliant SFP (pluggable) optical module (LC connector) based design, which supports onsite optical port replacement
• 2 x STM-1 electrical interfaces, SFP electrical module (Mini BNC connector) Optional
• Maximum 63 E1 interfaces compliant with ITU-T G.703
• 120 Ohms E1 and 75 Ohms E1 interfaces options available
• Provides complete diagnostics facilities to the user for monitoring optical ports and provide reading of optical transmit power, optical receive power, laser temperature, bias current in voltage alarms etc.

Timing Mode

• Synchronization with STM-1 line timing
• Synchronization with timing from any of the E1 interfaces
• External timing source option - 120 Ohms 2Mbps (External Bits Clock)
• External timing source - 120 Ohms 2MHz (External TTL Clock) - Factory Configurable
• Internal Clock - ITU-T G.813 internal oscillator (Stratum 3)
• The timing source can be auto-switched according to default or operator programmed settings

Management and Maintenance Interfaces

• 10/100BaseT Ethernet management interface
• RS232 serial management interface
• Remote (Telnet) management interface
• Windows XP based Graphical User Interface (GUI)
• Windows 7 based Graphical User Interface (GUI)
• SNMP V2 Monitoring
• Engineering Order Wire (EOW) interface (RJ-11)
• NMS (Network Management System) for monitoring multiple units from a single / central location

Alarm and Indicator Monitoring

• Power Indicator
• Current Status (integrity and activity) Indicator
• Urgent Alarm Indicator
• Minor Alarm Indicator
• Optical Signal Loss Alarm Indicator
• Remote Device Power-down Indicator
• Auto Laser Shutdown (ALS) Indicator
• Engineering Order-Wire (EOW) Indicator
• Dry contact via 9-pin, D-type male connector
• Buzzer Alarm
• SNMP Diagnostic and Monitoring.