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GPS Stratum 1 Timing Source Telecommunication T1 E1 Circuits


GPS Stratum Main Graphic
Enable One to Four T1/E1 timing interfaces with Stratum 1 Timing Signals
The PrimaStratum receives GPS satellite timing signals to control an onboard oscillator providing from one to four T1 or E1 Stratum 1 reference clocks. The PrimaStratum utilizes a mixed-signal phase lock loop GPS driven frequency module to generate extremely accurate 1.544MHz/T1 and/or 2.048MHz/ E1 references clocks that are frequency locked to the Global Stratum 1 source. The Stratum 1 clock is the basis for all telecom voice and data interfaces, required to assure proper synchronization of signals and call quality. The PrimaStratum incorporates this timing signal as a source for timing multiple telecom digital interfaces (T1/E1). These interfaces can be used to synchronize even remote telco equipment to a reliable, standard timing signal.

An Ethernet Switch Option provides transparent LAN bridging, user data bandwidth and access control through rate limiting and port-based VLAN filtering and tagging. This added functionality permits the PrimaStratum to be especially useful for installations requiring the multiplexing of legacy cellular services, such as 2G, with newer 3G and 4G circuits.
IP Backhaul Timing Source

The PrimaStratum guarantees TDM timing signal availability as a basis for all voice and data circuits no matter how remote or isolated the location of the interface equipment. Applications include cellular backhaul, remote data/voice extension, Last Mile data services in rural and remote areas, upgrade of existing TDM carrier circuits to combined IP and TDM backhaul interfaces.

PrimaStratum Standard Features

Telco Timing Extension
The Engage PrimaStratum provides superior timing synchronization for the most isolated and remote locations. The system is a cost-effective, small footprint unit, easily rack or shelf-mountable. The unit provides up to four T1/E1 interfaces and communication ports for remote management, alarm monitoring and configuration. The four interfaces can be used a Stratum 1 clock references or can support up to two interfaces for injection mode re-timing. Management of the unit can be via Ethernet (SNMP) or console interface. The PrimaStratum has a built-in antenna interface that permits extension of the appropriate GPS antenna.

Injection Mode Timing
The PrimaStratum Injection mode timing adds Stratum 1 clocking to individual circuits as they are passed through the unit.Two T1, two E1 or one T1 and one E1 circuit can be connected to thePrimaStratum. The unit than re-times these circuits to the GPS based Stratum 1 timing oscillator within the PrimaStratum. The out circuits can be used to provide timing for carrier service equipment at the remote location or Base Station.

Secure Socket Shell - SSH
Engage’s Secure Socket Shell, which is based upon industry proven Open SSH and FIPS 140 approved Open SSL version 2.0, provides secure encrypted communications between SSH clients such as OpenSSH, SecureCRT, and PuTTY and the IPTube’s Command Line Interface.

The PrimaStratum is able to be fully managed with SNMP via standard and private MIBs. Large scale deployments of Engage Communication products with centralized management have made SNMP support a priority. The PrimaStratum is easily controlled and monitored when installed within a larger network of SNMP managed products. SNMP Traps for error events enable proactive service fault isolation.

PrimaStratum Options
Ethernet Switch OPTION - SWITCH

The PrimaStratum is available with a five port 10/100 Ethernet QoS switch integrating a high-performance switching fabric with four priority queues. The switching capability is useful when combining legacy mobile services with newer IP based services for backhaul and service consolidation. The GPS timing interface serves dual purposes, Stratum 1 clock and service multiplexer.

Advanced features include 802.1p/IPv4/IPv6 traffic classification, full IEEE 802.1Q VLAN, RMON, SNMP, Port Monitoring and Layer 2 firewall. QoS determined by destination MAC address, port ID, IEEE 802.1p and multimedia traffic tags, IPv4 Type of Service (TOS), and Differentiated Services (DiffServ).

Rate Limiter
The Ethernet switch Ingress and/or Egress Rate Limiter option enables the reservation of bandwidth for time-sensitive T1/E1 Over IP real time connections. The data rate limit range is 128 kilobits to 64 Megabits in binary increments.

The Rate Limiter option limits WAN bandwidth utilized by the LAN1 to LAN2 bridge. Rate Limiting the traffic enables the reservation of the WAN bandwidth for times of high data usage when multiplexing 2G, 3G and 4G carrier services. Rate Governing is only applied in the direction to the WAN to minimize latency.


Pay-As-You-Grow Field Upgrades
The PrimaStratum GPS Timing Source is designed for Pay-As-You-Go growth from one through four T1/E1s per unit. Customers can elect to economize initial network installations, by purchasing their PrimaStratum with a single active port. As the network grows enable additional ports via a software-based license key. Additionally any port on the PrimaStratum can be configured as T1 or E1, so a unit supports a mixed combination of ports. This permits even T1 standard sites to utilize the extra bandwidth of E1 circuits as interfaces when needed for additional back-haul throughput.

Solution Overview

Prima Stratum A stand-alone, GPS Disciplined Oscillator based TDM/Ethernet timing source. The Engage PrimaStratum provides Stratum 1 level timing signals for the interfacing of TDM and IP based circuits.