CDM-625
Advanced Satellite Modem_高階衛星數據機
這是Comtech的第一款高階衛星數據機，它將諸如VersaFECFE和低密度奇偶校驗（LDPC）碼之類的高級前向糾錯（FEC）與革命性的DoubleTalk Carrier-in-Carrier頻寬堆疊，從而在所有情況下均實現了最大程度的節省。 先進技術的這種結合實現了多維優化，從而使衛星通信用戶能夠：
•最大限度地減少運營費用（OPEX）
•在不使用額外轉發器資源的情況下最大化吞吐量
•在不使用額外轉發器資源的情況下最大化可用性（邊際）
•通過允許使用較小的BUC / HPA和/或天線來最小化資本支出（CAPEX）
•或者，組合以滿足特定的業務需求
- DoubleTalk Carrier-in-Carrier bandwidth compression
- Carrier-in-Carrier Automatic Power Control
- Adaptive Coding and Modulation (ACM)
- Packet Processor with header compression, payload compression, advanced Quality of Service (QoS) and Managed Switch Mode
- 4-port managed Ethernet switch with VLAN and QoS
- Jumbo frame support
- Dual Band Capability: 70/140 MHz and L-Band in same unit, extended L-Band receive
- Data Rate: 18 kbps to 25 Mbps
- Symbol Rate: 18 ksps to 12.5 Msps • Modulation: BPSK, QPSK/OQPSK, 8PSK/8-QAM, 16-QAM
- FEC: Viterbi, Sequential, Concatenated Reed Solomon, TCM, Turbo Product Code (TPC) (IESS-315 Compliant), LDPC Code and VersaFEC (low-latency LDPC)
- Widest Range of data interfaces: EIA-422/530, V.35, G.703 T1, G.703 E1, G.703 T2, G.703 E2, Quad G.703 E1, ASI, LVDS, HSSI, 4-port 10/100Base-T Ethernet
- IEEE 1588v2 Precision Time Protocol
- Sub Mux to multiplex IP/Ethernet traffic with serial or G.703 traffic
- Drop & insert for T1/E1
- Enhanced D&I++ for single T1/E1 & quad E1
- Management: 10/100Base-T Ethernet with SNMP, Distant End SNMP Proxy, HTTP, Telnet and EIA-232/EIA-485
- Carrier ID using MetaCarrier® Technology
- Embedded Distant-end Monitor and Control (EDMAC)
- Automatic Uplink Power Control (AUPC)
- Engineering Service Channel (ESC/ESC++)
- Standard high-stability internal reference (± 6 x 10-8)
- 5-tap Adaptive Equalizer
- L-Band TX: 10 MHz reference for BUC, FSK communications and optional BUC power supply
- L-Band: Advanced FSK for LPOD M&C
- L-Band RX: 10 MHz reference and LNB power supply
- Open network modes
- 1:1 and 1:10 redundancy switches availabl