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(Click for frequent words.) 70 #MHz frequency [001] 69 GHz ISM 69 #MHz frequency [002] 69 #.#-#.# GHz frequency 69 #.#GHz frequency 68 7GHz 68 #.#GHz ISM 68 gigahertz GHz 68 GHz frequency 67 GHz frequencies 66 #.#GHz [001] 66 #GHz frequency band 66 GHz unlicensed 66 #,# GHz 65 unlicensed #.#GHz 65 GHz 65 #MHz #MHz [002] 65 #MHz #MHz [001] 64 #.#-#.# GHz [004] 64 #.#Ghz frequency 64 MHz bandwidth 64 #GHz frequency 64 megahertz MHz 64 5GHz 63 GHz spectrum 63 megahertz frequency 63 GSM# [002] 63 5Ghz 63 UHF frequency 63 gigahertz spectrum 63 #.#/#.# GHz 63 MHz 63 millimeter wave frequency 62 #.#-#.# GHz [001] 62 #/#MHz bands 62 #.#GHz [003] 62 #MHz spectrum [002] 62 #MHz #MHz #MHz 62 GSM# [001] 62 5MHz 62 GHZ 62 4MHz 62 5GHz bands 62 5GHz band 62 TDD spectrum 62 5GHz frequency 62 #.#MHz [005] 62 6MHz 62 #MHz bands 62 Gigahertz 61 GigaHertz 61 UHF frequencies 61 8GHz 61 #/#/#/# [001] 61 #.#/#.#GHz 61 unlicensed spectrum 61 #MHz frequencies [002] 61 UHF VHF 61 #MHz bandwidth 61 #MHz [001] 61 Ku Ka 61 MHz UMTS 61 MHz TDD 61 Frequency Hopping Spread 61 #Mhz [002] 60 duplexers 60 3MHz 60 MHz frequencies 60 megahertz MHz frequency 60 5GHz frequencies 60 spectrally efficient 60 #GHz [002] 60 #Mhz spectrum 60 8MHz 60 #.#Ghz spectrum 60 #.#MHz [003] 60 MHz frequency 59 #/#G [001] 59 #.#-#.# GHz [003] 59 #.#-#.# GHz [005] 59 #.#Ghz [002] 59 #.#GHz [002] 59 FHSS 59 #.#-#.# GHz bands 59 #.#GHZ [001] 59 #/#/#/# MHz GSM GPRS 59 Ghz 58 orthogonal frequency division 58 #.#MHz [006] 58 gigahertz 58 SKY# #LF 58 #Ghz 58 Ghz band 58 #.#GHz spectrum 58 #/#MHz [002] 58 #MHz [003] 58 channel bandwidths 58 Gigahertz GHz 58 division duplex FDD 58 directional antennas 58 6GHz 58 #/#/#/# MHz 58 #/#/#/#MHz 58 MIMO antennas 58 WCDMA HSDPA 58 demodulate 58 frequencies 58 5GHz spectrum 57 WCDMA HSPA + 57 mega hertz 57 omnidirectional antennas 57 OFDM Orthogonal Frequency 57 #MHz #MHz [003] 57 UMTS GSM 57 #.#b wireless LAN 57 sub 6GHz 57 UHF spectrum 57 #.#MHz [008] 57 Emphasizing peaceful coexistence 57 Spectrum FHSS 57 unpaired spectrum 57 LMS# [001] 57 Mhz 57 #GHz #GHz 57 #/#/#MHz 57 #Mhz frequency 57 AWM# 57 millimeter wave frequencies 57 W-CDMA/HSDPA 57 #.#MHz [002] 57 #Mhz [001] 57 unlicensed frequencies 57 division duplex TDD 57 unlicensed spectra such 57 transceiver chipset 57 #/#/# MHz [002] 57 megabits sec 57 GHz WiMAX 57 UMTS HSPA + 57 IEEE #.#b 57 5GHz frequency bands 56 CDMA 1XRTT 56 #.#GHz #.#GHz [003] 56 #.#-#.# GHz #.#-#.# GHz 56 Mhz frequency 56 #Mbps #.#g 56 waveband 56 W CDMA 3G 56 HSPA WCDMA 56 giga hertz 56 megahertz 56 RF transceiver IC 56 UWB ultra wideband 56 QAM quadrature amplitude modulation 56 GSM #/#/#/#MHz 56 3G HSPA 56 #.#GHz #.#GHz [001] 56 #.#-#.# GHz [002] 56 EGSM 56 OFDM modulation 56 LTE FDD 56 IMT# 56 Mbits s 56 #MHz [002] 56 GSM W CDMA 56 WCDMA LTE 56 MB DDR2 SDRAM 56 mesh backhaul 56 orthogonal frequency division multiplexing 56 E UTRA 56 2G GSM 56 dualband 56 steerable beams 56 GPRS GSM 56 GSM GPRS EDGE #/#/# 56 MHz UMTS HSDPA 56 UHF antennas 56 microwave frequencies 56 GSM HSPA 55 omni directional antennas 55 FEMs 55 gigahertz frequencies 55 #/#MHz [001] 55 bandwidths 55 ADRF# 55 passband 55 megahertz frequencies 55 GHz millimeter wave 55 kbit s 55 Wideband CDMA 55 #Khz 55 HSDPA WCDMA 55 HSDPA HSUPA 55 cdma# 55 airwave spectrum 55 #.# MHz [002] 55 GSM #/#/#/# MHz 55 #.#Gbit s [002] 55 Orthogonal Frequency Division Multiplexing 55 EDGE #/#/#/# 55 MIMO WLAN 55 T#/E# circuits 55 W CDMA HSDPA 55 High Frequency UHF 55 DAB DMB 55 1x RTT 55 RFR# 55 #MHz #.#GHz 55 transmits signals 55 kilohertz kHz 55 propagation characteristics 55 TWTAs 54 1MHz 54 omni directional antenna 54 WCDMA CDMA 54 #Msample s 54 #.#b #.#g 54 RF amplifier 54 #/#/#/# GSM 54 UMTS frequencies 54 GSM GPRS Edge 54 2kHz 54 AWL# 54 UMTS HSDPA HSUPA 54 GSM WCDMA 54 #.#g Wi Fi 54 UMTS 3G 54 optical modulators 54 triband GSM 54 subcarriers 54 WCDMA 54 XBee PRO ZNet 54 RF tuner 54 GSM GPRS cellular 54 Airspan HiperMAX 54 UMTS 54 instrumentation amplifiers 54 quadrature modulators 54 Texas Instruments OMAP processor 54 MBit s 54 EDGE GPRS 54 ADF# 54 transceiver IC 54 W-CDMA/HSPA 54 Telstra NextG network 54 #KHz [002] 54 GSM GPRS 54 Gbits sec 54 #Mhz [003] 54 Wireless Gigabit 54 GaAs FET 54 OFDM orthogonal frequency 54 LVPECL outputs 54 AR#AP 54 frequency synthesizer 54 local oscillator LO 54 #/#/# [023] 54 MHz UHF 54 quadband GSM EDGE 54 MHZ 54 Mbps HSPA 54 AWT# AWT# 54 MicroMAX 54 linear amplifiers 54 ULP Bluetooth 54 2MHz 54 SkyExtender 53 radio frequencies 53 GSM GPRS EGPRS 53 #bit ADC 53 Cingular EDGE 53 WCDMA Wideband Code 53 LVCMOS 53 HSUPA HSDPA 53 RF vector 53 Personal Handyphone System 53 IEEE #.#a/b/g 53 HELP3 TM 53 FM subcarrier 53 #.#/#G 53 Wifi Bluetooth 53 dBm output 53 EDGE GPRS GSM 53 3G HSUPA 53 GSM #/#/# 53 #GHz bandwidth 53 Time Division Duplexing 53 ARM# core [001] 53 HSDPA 3G 53 terahertz THz 53 RGB LEDs 53 GSM EDGE networks 53 Alvarion BreezeACCESS VL 53 5GHz #.#a 53 Airbiquity aqLink 53 Micro Modem 53 CDMA W CDMA 53 Terahertz radiation 53 Mobile WIMAX 53 Power Amplifier PA 53 QAM modulation 53 DCS PCS 53 MIMO antenna 53 frequency UHF 53 #.#a/g/n 53 2G EDGE 53 #MHZ [002] 53 GaN HEMT 53 mHz 53 #.#j 53 Quadband 53 WCMDA 53 Anywave 53 multicarrier 53 #Mbyte s [001] 53 #.#b g WLAN 53 HSxPA 53 dBi gain 53 AFBR 53 uW 53 #-bit/#MHz 53 #MHz UMTS 53 Kb s 53 WirelessMAN 53 CS# EDC 53 3G/WCDMA 52 #Mbit/sec [001] 52 Qualcomm MSM# chipset 52 diplexer 52 dB SNR 52 2MHz switching frequency 52 frequency spectrums 52 WCDMA HSPA 52 GaAs FETs 52 GPRS WCDMA 52 W CDMA 52 #Tx/#Rx 52 kbit 52 #GHz [001] 52 GSM TD SCDMA 52 wi max 52 #.#a/b/g Bluetooth 52 CDMA# 1x 52 #.#bg 52 MHz GSM GPRS 52 wideband RF 52 #GHz spectrum 52 Ovation MC#D 52 UMTS HSDPA 52 CDMA EVDO 52 DNP NMR 52 KHz 52 AT#RF# 52 gigabits sec 52 GPRS EDGE 3G 52 UMTS HSPA 52 STLC# 52 VCOs 52 #kb s [001] 52 IEEE #.#a 52 multistandard 52 expandable cordless 52 speed uplink packet 52 #T#R 52 E pHEMT 52 Mbit sec 52 quadband GSM 52 HSDPA UMTS 52 MHz transponders 52 GSM GPRS #/#/# 52 FSK transceiver 52 XTAR EUR 52 W CDMA handsets 52 TDA# [001] 52 mega hertz MHz 52 WLAN router 52 #x# MIMO 52 MOTOMESH Duo 52 LF HF 52 WLAN chipsets 52 LMDS 52 CDMA 1xRTT 52 GSM 52 GHz transceiver 52 cellular basestations 52 wideband 52 quadband 52 #.#Mbps HSPA 52 #Mbits [002] 52 MHz spectrum 52 #.#MHz [004] 52 asynchronous SRAM 52 UMTS WCDMA 52 Mbps symmetric 52 Spectrum DSSS 52 Qualcomm MediaFlo 52 baseband chipset 52 #dB attenuation 52 Division Duplex FDD 52 multichannel multipoint distribution 52 AN #i 52 Raman amplifiers 52 penta band 52 W CDMA networks 52 IEEE#.#.# 52 WCDMA UMTS 52 dualmode 52 VHF frequencies 52 EvDO 52 FM modulator 52 WCDMA GSM 52 byte FIFO 52 FDD TDD 52 GSM EDGE 52 3G UMTS networks 52 pin SOIC package 52 #G/#G cellular 52 GPRS EDGE UMTS 52 analog baseband 52 DCS# 52 UMTS modem 52 3G WCDMA 52 GSM #/#/#/# 52 #.#a/b/g/n 52 spread spectrum FHSS 52 Mbits sec 52 vertical cavity 52 GSM #/#/# MHz 52 kHz 52 GaN HEMTs 52 #.#Mbit/sec 52 GaAs PHEMT 52 UMTS# 52 VCXO 52 #.#h [001] 52 3G CDMA# 52 coax cables 52 tunable filters 52 #Mbit/sec [002] 52 #.#b wireless 51 AWB# 51 #.#G GPRS 51 GSM EDGE #/#/#/# 51 Frequency Division Duplexing 51 GaAs pHEMT 51 cdma# 1x 51 Differential Quadrature Phase 51 Dongles 51 HD#/HD# 51 #MHZ [003] 51 downconverter 51 UMTS/3G 51 dynamic beamforming 51 GSM TDMA 51 MBd 51 #nm #nm [003] 51 multimode optical fiber 51 FGR2 PE 51 4Gbyte 51 GigaBeam founders 51 RFR# TM 51 WiBRO 51 microcells 51 #.#MHz [007] 51 directional couplers 51 #dB SFDR 51 WiMAX WiBro 51 #G/#G/#G 51 EVDO Rev.A 51 Mobile WiMAX #.#e 51 #Mbs [002] 51 mesh nodes 51 TQM# 51 #kbit s [002] 51 ARM Cortex M3 microcontroller 51 BPSK 51 amplitude modulated 51 UMTS Universal 51 Backhaul Solution 51 2Mbit 51 noise ratio OSNR 51 DSL cable modems 51 electro magnetic spectrum 51 optical wavelength 51 terahertz frequencies 51 GSM cellular 51 1Mb s 51 WiMAX basestation 51 CW RTTY 51 Ku Band 51 #.#a [001] 51 I2C programmable 51 1xRTT 51 wireless LANS 51 SkyWay MAX 51 accelerator emulator 51 kbits 51 MeshAP 51 IEEE #.#.# compliant 51 DWDM dense wavelength 51 narrowband 51 UMTS W CDMA 51 3G/HSDPA 51 coarse wavelength division multiplexing 51 wavelength division multiplexing 51 GMSK 51 serdes 51 FlexWave URH 51 DWDM wavelengths 51 3G W CDMA 51 RF propagation 51 #Mbits/sec [001] 51 GaAs MMIC 51 pico cell 51 Ovation MC# 51 #.#a g 51 Gigabit PON GPON 51 Mbit s 51 #.#G 3G 51 #Kb s 51 MOTOTRBO 51 uplink bandwidth 51 omnidirectional antenna 51 Aloha Partners LP 51 ONUs 51 WiFi #.#b 51 DDR DRAMs 51 silicon LDMOS 51 MAC baseband processor 51 dBi 51 amplifier modules 51 GMRS 51 Microwave Radios 51 Raman amplification 51 corded cordless 51 #KHz [001] 51 Lucent Flexent 51 midband 51 cdmaOne 51 1G 2G 51 detachable antenna 51 #.#G HSDPA 51 8kHz 51 wideband CDMA 51 AWT# 51 W CDMA UMTS 51 mobile WiMax #.#e 51 UWB radios 51 #dBi 51 TDMA networks 51 8PSK 51 #.#Gbps [001] 51 #kpbs 51 parasitic capacitances 51 GSM GRPS 51 Frequency Synthesizer 51 terahertz frequency 51 HYLAS satellite 51 resistive capacitive 51 transimpedance amplifier 51 4Mbit s 51 terrestrial repeater 51 RF Radio Frequency 51 RF transceivers 51 Ultra Wide 51 wireless 50 ultrawide band 50 output MIMO 50 mhz 50 lightwave 50 AfriStar 50 wi fi router 50 HiperMAX 50 Mbps HSUPA 50 Model #A 50 #.#G bps 50 EGPRS 50 UTMS 50 CDMA 1x EVDO 50 terrestrial transmitters 50 MMIC amplifiers 50 #MHZ [001] 50 WCDMA CDMA# 50 frequency modulation 50 E UTRAN 50 oscillator frequency 50 radioOne 50 MB OFDM 50 amplifier module 50 ExtendAir 50 downlink uplink 50 TWT amplifiers 50 WCDMA wideband CDMA 50 PIN diode 50 Suitcase CCT# 50 PMBus interface 50 Mbit s upstream 50 HiperMAX base 50 FSBs 50 RF amplifiers 50 #.#G HSPA 50 LTE HSPA + 50 geo stationary satellite 50 kpbs 50 #Mbps downstream [001] 50 3G 50 Multimode 50 MXtv 50 CDMA1X 50 cassette adapters 50 Mhz spectrum 50 1XRTT 50 HyperTransport links 50 +# dBm output 50 modulation formats 50 3G UMTS HSPA 50 #.#Gbit/sec 50 Mpbs 50 Mbit s downstream 50 parametric equalization 50 LTE WiMAX 50 WiMedia UWB 50 frequency synthesizers 50 macrocells 50 #.#a/b/g radios 50 TNETW# 50 SeeGull 50 DVB H DMB 50 kHz sampling 50 FlexWave Prism 50 UMTS HSDPA 3G 50 WirelessUSB 50 3G/GSM 50 Digivance 50 WCDMA 3G 50 BUCs 50 GPIO interface 50 #.#.#/ZigBee 50 #Mpbs 50 Gbit sec 50 BreezeACCESS 50 NTT DoCoMo 3G FOMA 50 FSK modulation 50 #bit ADCs 50 terrestrial analogue 50 HSPA + 4G 50 RF transmitter 50 input impedance 50 #MHz #MHz band 50 embedded SERDES 50 3G/UMTS 50 #M bps [001] 50 LNAs 50 #.#b/g/n 50 TX RX 50 CDMA iDEN 50 milliamps mA 50 WCDMA networks 50 GSM UMTS 50 amplitude modulation 50 Megahertz MHz 50 Msamples s 50 fiber optic transceivers 50 RFMD RF#x 50 SoftMSC 50 EDGE WCDMA 50 ultrawideband UWB 50 MODBUS RTU 50 CDMA# [001] 50 HDSPA 50 CWave 50 MAX#/MAX# [002] 50 GPRS #/#/# 50 5V supply 50 Selection DFS 50 A2DP streaming 50 Triband 50 VHF UHF 50 wavelength tunability 50 Intel XScale PXA# processor 50 LVPECL 50 RT# [003] 50 #.#kHz [001] 50 linear transducer 50 WCDMA EDGE 50 Downlink Freq 50 UM# [002] 50 CDMA EV DO 50 BeamFlex 50 #.#G GSM GPRS 50 CDMA 1x EV DO 50 #.#Gb s [001] 50 #.#Gbit s [001] 50 kilohertz 50 ASDL 50 GPRS UMTS 50 IEEE#.#b 50 bi directional amplifiers 50 UWB WiMedia 50 #/#G [002] 50 intersystem 50 crosspoint switches 50 Tbit s 50 Smart Antenna 50 polar modulation 50 oscillators filters 50 GSM GPRS EDGE WCDMA 50 RF transceiver 50 WPA TKIP 50 handheld spectrum analyzer 50 optical multiplexer 50 multi megabit 50 radiocommunications 50 1MHz switching frequency 50 ghz 50 wireless basestation 50 uncompressed HDTV 50 Low Noise Amplifiers 50 E Link #EXR 50 1Mbit s 50 Wi Fi #.#b g 50 #.#n APs 50 #G/#.#G 50 GDDR5 memory clocked 49 5GHz #.#n 49 ultrawideband 49 quadband GSM GPRS EDGE 49 datarates 49 ± 5V 49 DRX H 49 analog circuitry 49 Spread Spectrum 49 Ultra wideband 49 frequency HF RFID 49 Gpbs 49 #x# MHz 49 ATS# 49 PIN diodes 49 handheld analyzers 49 quartz crystal oscillator 49 ISDB Tmm 49 ps nm 49 GSM GPRS EDGE UMTS 49 transceiver module 49 CWDM SFP 49 user selectable bandwidths 49 Cat5 cable 49 pico cells 49 TI MSP# MCU 49 SP#E 49 TI CC# 49 1M bps 49 WLAN #.#n 49 LVPECL LVDS 49 BAW filters 49 #Mbps megabits per [001] 49 NaviLink 49 CDMA 1x 49 TQM#M# 49 W2A satellite 49 wideband code 49 #.#GHz WiMAX 49 GSM EDGE UMTS 49 InterReach Spectrum 49 #X# MIMO 49 MT#A 49 IEEE #.#b g 49 #.#MHz switching frequency [002] 49 Wimax 49 Mbps downlink 49 GSM Evolution 49 #Kbit/sec 49 RS-#/# 49 baseband MAC 49 WPANs 49 W OFDM 49 attocell 49 Digita Oy 49 UMTS GPRS 49 frequency RF 49 #.#Mb s [002] 49 Ovation U# 49 femto cells 49 #MIPS [002] 49 #khz 49 triplexer 49 basestations 49 SDIO interface 49 Kbits 49 3G multimode 49 HSDPA 49 frequency hopping 49 #MHz spectrum [001] 49 wideband CDMA WCDMA 49 LTE modem 49 parametric EQ 49 diplexers 49 Sprint Power VisionSM 49 sensor nodes 49 micro pico 49 GSM EDGE WCDMA 49 DSL cable modem 49 dBi antenna 49 GERAN 49 Agilent U#A 49 #kHz frequency [001] 49 #.#G [005] 49 wireless mesh nodes 49 narrowbanding 49 XTAR 49 ARM9 processor 49 baseband processors 49 ntl Broadcast 49 #.#MHz [001] 49 5MHz bandwidth 49 #Kbit [002] 49 megahertz MHz spectrum 49 subcarrier 49 ohm coaxial cable 49 Mbps HSPA + 49 frequency modulated 49 #x#mm package 49 #.#Mbps HSDPA 49 Ka Ku 49 IEEE#.#b g 49 Wi-Fi/WiMAX 49 XO VCXOs 49 HSPDA 49 #.#Tbps [002] 49 #.#Gb s [002] 49 RF modules 49 xDSL modems 49 ANADIGICS AWT# 49 Internationally Emmis owns 49 mux demux 49 Netgear RangeMax 49 Bluetooth EDR 49 NXCPUs 49 #G/#G/LTE 49 Phased Array 49 nanoGSM 49 #bit PCI 49 femtocells picocells 49 ZigBee protocol 49 UMTS EDGE GPRS GSM 49 modulation schemes 49 GSM GPRS CDMA 49 ADN# 49 GE PON 49 PSTN PLMN 49 3G UMTS 49 VCSELs 49 satellite DARS 49 anti aliasing filters 49 LVDS output 49 serialiser 49 #Mb/sec [001] 49 WNDR# 49 kHz frequency 49 electret 49 CDMA 1X networks 49 E1 T1 49 Gbits s 49 Synchronous Digital Hierarchy 49 #/#.#G 49 Apple A4 processor 49 arbitrary waveform generators 49 #.#GB/sec [002] 49 2GHz 49 Graphic EQ 49 baseband modem 49 Direct Sequence Spread 49 highspeed Internet 49 modulated RF 49 #.#G [001] 49 Vanu Anywave 49 Vpp 49 Qualcomm chipset 49 SQUIDs 49 CDMA# [002] 49 widely tunable laser 49 multihop 49 single sideband 49 MDM# 49 PWM output 49 muxes 49 Ultra wideband UWB 49 sub channelization 49 QPSK 49 WorldMode 49 geostationary satellites 49 PXI Express chassis 49 IF amplifier 49 terahertz 49 WiMax Worldwide Interoperability 49 3G #.#G 49 MSPS ADC 49 baseband IC 49 XAUI interface 49 RF# FEM 49 WCDMA GPRS 49 frequency transmitters 49 Roaming Client 49 tunable optical 49 UMTS EDGE 49 #x# MIMO #.#n 49 baseband modems 49 0 dBm 49 OZMO# 49 Niveus Media Extender 49 Intel PXA# processor 49 Gbps wavelengths 49 QAM channels 49 1xEVDO 49 HSPA 49 GSM GPRS EDGE CDMA# 49 MIMO configurations 49 CMOS transceiver 49 dipole antenna 49 supports quadband GSM 49 synchronous rectification 49 serial EEPROMs 49 HEMTs 49 mobile WiMAX #.#e 49 RF subsystems 49 WiLink 49 UMTS LTE 49 kHz bandwidth 49 breakdown voltages 49 protocol multimedia subsystem 49 DDR2 DDR3 49 MEMS oscillators 49 baseband processor 49 GSM GPRS EDGE #/#/#/# 49 Access Points APs 49 transmitters receivers 49 UMTS HSUPA 49 serial RapidIO 49 MB#K# 49 Alvarion BreezeMAX 49 pin TQFP package 49 #K bps 49 TDtv 49 kbps kilobits per 49 Wi max 49 OMAP# processor [001] 49 BNC connectors 49 #.#b g 49 ESTeem 49 BlueCore5 49 MDDI interface 49 RS# serial port 49 +7 dBm 49 Kbit s 49 UMTS CDMA 49 duplexer 49 #.#ghz [002] 49 USBConnect 49 Gigabit Ethernet transceivers 49 synthetic aperture 49 TEW #GR 49 TDMA GSM 49 power amplifiers PAs 49 WiMAX Worldwide Interoperability 49 SingleRAN 49 Powerline adapters 49 LiNbO3 49 W CDMA HSPA 49 mono headset 48 MAX#A 48 ATR# [002] 48 baud rate 48 datarate 48 1G Ethernet 48 seamless interworking 48 #BASE T [002] 48 IEEE#.# [002] 48 noise amplifiers LNAs 48 baud 48 2G 48 #MSPS 48 #.#Gbps [003] 48 GHz chipsets 48 GHz cordless 48 GPRS #.#G 48 Quadband GSM 48 WiMAX IEEE #.#-# 48 GSM WCDMA HSPA 48 #.#b WiFi 48 Mbps 48 asynchronous serial 48 antenna arrays 48 emit electromagnetic radiation 48 #kHz [002] 48 Seven.Five 48 microcell 48 analog converter DAC 48 DWDM SFP 48 #GBASE CX4