Product SummaryRAD's ACE-3100 and ACE-3200 cell-site gateways (CSGs) connect one or several base stations (BTSs) and node Bs, over shared access lines, to ATM, SDH/SONET or PSN backbones. Featuring "Any-Service-Any-Port" functionality, RAD's ACE CSGs incorporate flexible port configuration to allow grooming of circuit-emulated (CES) TDM E1/T1s, fractional E1/T1 UNIs or several IMA links into a single IMA, STM-1/OC-3 or Fast Ethernet network interface. Incorporating pseudowire technology with high precision clock recovery and clock distribution capabilities, they support effective delivery of 2G TDM and 3G ATM services over Ethernet, IP or MPLS networks. Benefits• Expand network capacity and enable controlled introduction of 3G services with no additional capital investments in infrastructure• Reduce CapEx using economical STM-1/OC-3 ports in the transport network• Lower OpEx by aggregation and optimization of deployed SDH/ATM equipment, reducing overall number of network links• Improve network efficiency by employing statistical traffic multiplexing, performance monitoring and end-to-end QoS attributes, requiring fewer technician truck rolls• Enable cost effective multi-generation service integration and efficient handling of real-time and delay-tolerant traffic over any transport• Support balanced migration to PSN backhaul• Save on 2G/3G colocation costs with smallest devices in the market Further Product InformationRAD's ACE-3100 and ACE-3200 cell site gateways are specifically designed to accommodate the rapid expansion in mobile backhaul traffic resulting from the widespread deployment of new cellular services such as 3G mobile broadband and rich-media communications. They simplify service provisioning and control by supporting 2G/3G colocation and enabling simultaneous delivery of GSM, UMTS and next-generation 3GPP services over the same transport network. Working opposite the ACE-340x and ACE-3600 aggregation site gateways, the ACE-3100 and ACE-3200 minimize capital investments and shorten service rollout times by leveraging available ATM and SDH/SONET infrastructure. Additionally, RAD's CSGs optimize RAN efficiency, thereby offsetting the cost of increased bandwidth capacity, reduce operating expenses and protect operator revenues. Reduce cellular backhaul expenses through aggregation and overbookingThe ACE-3100 and ACE-3200 connect one or several base stations (BTSs) and node Bs to ATM, SDH/SONET or PSN backbones, over shared access lines. Featuring "any service any port" functionality, RAD's ACE CSGs incorporate flexible port configuration to allow aggregation of circuit-emulated (CES) TDM E1/T1s, fractional E1/T1 UNIs or several IMA links into a single IMA, STM-1/OC-3 or Fast Ethernet network interface. This minimizes the number of overall network links and facilitates the use of lower-priced, higher bit-rate STM-1/OC-3 ports in network edge switches, instead of costly E1/T1 links or deployment of additional switches. Mobile operators can therefore allocate their backhaul resources more effectively and reduce the number of leased services required to support their networks, consequently lowering their backhaul capital expenditures (CapEx). Furthermore, by supporting inherent ATM QoS attributes, RAD's RAN backhaul solutions enable service differentiation and traffic engineering, including prioritization, shaping and scheduling. Together with ATM's statistical multiplexing nature, this allows operators to optimize network utilization by implementing overbooking strategies, thereby reducing service costs and operating expenditures (OpEx). Emulated TDM/ATM services over PSNPacket transport offers great savings in backhaul costs and enables scalable adaptation to required bandwidth capacity. RAD's CSGs support operators in carrying out a step-by-step transition to PSNs, for example by separating real-time GSM/TDMA and UMTS voice/video traffic from delay-tolerant HSDPA traffic, using a hybrid of PSN and deterministic TDM or ATM transport networks. Alternatively, operators can converge multi-generation traffic over an all-IP RAN, using ATMoPSN, CESoPSN or SAToP pseudowires, with accurate synchronization and clock distribution mechanisms, as well as with various encapsulation and QoS schemes for delivering ATM and TDM traffic over L2 and L3 networks. Timing and synchronizationThe ACE-3100 and ACE-3200 receive timing data from either an E1/STM-1 link or adaptively recover it from the PSN, using a dedicated pseudowire. The adaptive clock recovery mechanism enables robust traffic synchronization over packet transport and meets the strict timing requirements of mobile networks. Complying with ITU-T G.823 and G.824 specifications, as well as with the more recent ITU-T G.8261 standard, these CSGs ensure better than 16ppb (parts per billion) clocking accuracy. In addition, the ACE-3100 and ACE-3200 are software-upgradeable to meet the emerging IEEE 1588v2 standard, as it becomes widely implemented. 
Aggregation at the controller site
Emulated TDM and ATM services
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