Installing Transceivers and Optical components on Avaya Virtual Services Platform 4000 Release 4.1 NN46251-301 Issue 06.
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Contents Chapter 1: Introduction............................................................................................................ 6 Purpose.................................................................................................................................. 6 Related resources................................................................................................................... 6 Support.......................................................................................
Contents Optical fiber connector damage warning statement.................................................................. 55 SFP damage warning statement............................................................................................. 57 Appendix A: Port numbering................................................................................................. 59 Port numbering.....................................................................................................................
Chapter 1: Introduction Purpose This document provides installation instructions and technical specifications for the following: • Small form factor pluggable (SFP) transceivers • SFP plus (SFP+) transceivers. For a list of supported transceivers, see the latest product-specific release notes. Information in the release notes takes precedence over information in this document.
Related resources Procedure • To find videos on the Avaya Support website, go to http://support.avaya.com and perform one of the following actions: - In Search, type Avaya Mentor Videos to see a list of the available videos. - In Search, type the product name. On the Search Results page, select Video in the Content Type column on the left. • To find the Avaya Mentor videos on YouTube, go to www.youtube.
Introduction 5. In the GENERAL NOTIFICATIONS area, select the required documentation types, and then click UPDATE. 6. Click OK. 7. In the PRODUCT NOTIFICATIONS area, click Add More Products. 8. Scroll through the list, and then select the product name. 9. Select a release version. 10. Select the check box next to the required documentation types. 8 Installing Transceivers and Optical components on Avaya VSP 4000 Comments? infodev@avaya.
Support 11. Click Submit. Support Go to the Avaya Support website at http://support.avaya.com for the most up-to-date documentation, product notices, and knowledge articles. You can also search for release notes, downloads, and resolutions to issues. Use the online service request system to create a service request. Chat with live agents to get answers to questions, or request an agent to connect you to a support team if an issue requires additional expertise.
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Chapter 2: New in Release 4.1 The following sections detail what is new in Installing Transceivers and Optical components on the Avaya Virtual Services Platform 4000 Series (NN46251–301), for Release 4.1. Related Links Features on page 11 Other changes on page 11 Features This section provides information on feature-related changes. 10 Gigabit Ethernet Optical SFP+ transceivers Release 4.
Chapter 3: Safety and equipment care This chapter contains important safety and regulatory information. Read this section before you install Small Form Factor Pluggable (SFP) and Small Form Factor Pluggable Plus (SFP+). Fiber optic equipment care Use the information in this section to properly maintain and care for fiber optic equipment. Transceivers are static sensitive. Dust contamination can reduce the performance of optical parts in transceivers.
Fiber optic equipment care • Do not stand on fiber optic cable; keep the cable off the floor. • Do not pull fiber optic cable harder than you do a cable containing copper wire of comparable size. • Do not allow a static load of more than a few pounds on a section of the cable. • Place protective caps on fiber optic connectors that are not in use. • Store unused fiber optic patch cables in a cabinet, on a cable rack, or flat on a shelf.
Safety and equipment care Cletop, to clean the connector. A reel cleaner is a good choice to ensure that no dust contaminates the connector. • If the connector is visibly dirty or you suspect contamination by chemicals (for example, matching gel), use high-quality alcohol and canned air to clean the connector. This method is the most thorough cleaning method. In some cases, a reel cleaner can suffice. The more surface manipulation you apply to the connector, the more likely you are to damage the connector.
Fiber optic equipment care Important: Do not let the IPA evaporate; wipe it dry immediately. Alcohols can leave a residue that is difficult to remove. 4. Dry the connector surfaces by applying canned air. 5. Inspect the connector to ensure it is clean and undamaged. To prevent contamination, do not touch the connector surfaces after cleaning; and cover connectors with dust caps if they are not in use.
Safety and equipment care 3. Gently wipe the cylindrical and end-face surfaces of both ferrules using a tissue saturated with optical-grade isopropyl alcohol. 4. Gently wipe the cylindrical and end-face surfaces with a dry tissue. Important: Do not let the IPA evaporate; wipe it dry immediately. Alcohols can leave a residue that is difficult to remove. 5. Blow dry the connector surfaces with canned air. 6. Inspect the connector to ensure it is clean and undamaged. 7.
Fiber optic equipment care Important: Do not let the IPA evaporate; wipe it dry immediately. Alcohols can leave a residue that is difficult to remove. 4. Remove lint by blowing compressed air into the optical port. 5. Reconnect the optical connector and check for proper function. If you do not reinstall the connector, use a protective cap. If problems persist, ensure that the connector or receptacle is free from damage.
Chapter 4: SFP This chapter provides installation procedures and specifications for small form factor pluggable (SFP) transceivers. SFP transceivers This section describes how to select and install small form factor pluggable (SFP) transceivers. Use SFP transceivers to connect a device motherboard to a fiber optic or unshielded twisted pair network cable. The SFP transceivers described in this chapter provide Ethernet at 1 gigabit per second (Gbps).
SFP transceivers Possible media include CAT5, single mode fiber, and multimode fiber. Possible connectors include LC, MT-RJ, and RJ-45. 3. If the media is optical fiber, determine wavelength restrictions or requirements. To expand available bandwidth on a common optical fiber, use Coarse Wavelength Division Multiplexing (CWDM) SFP transceivers. 4. Determine if you need digital diagnostic monitoring (DDM). DDM is enabled by default. Not all SFP transceivers or products support DDM.
SFP Hardware Description Part number 1000BASE-ZX CWDM (LC) 1470 nm to 1610 nm, up to 70 km AA1419061-E6 to AA1419068-E6 1000BASE-BX10 DDI SFP Bidirectional 1310 nm and 1490 nm, single fiber LC, up to 10 km AA1419069-E6, AA1419070-E6 paired device 1000BASE-EX DDI SFP 1550 nm, up to 120 km AA1419071-E6 1000BASE-BX40 Bidirectional 1310 nm and 1490 nm, single fiber LC, up to 40 km AA1419076–E6, AA1419077–E6 paired device 100BASE-FX SFP 1310 nm, LC connector AA1419074-E6 Important: Avaya recom
SFP transceivers Procedure 1. Remove the SFP from its protective packaging. 2. Grasp the SFP transceiver between your thumb and forefinger. 3. As shown in the following figure, insert the device into the slot on the module. Warning: Risk of equipment damage SFP transceivers are keyed to prevent incorrect insertion. If the SFP transceiver resists pressure, do not force it; turn it over, and reinsert it. Apply a light pressure to the device until it clicks and locks into position. 4.
SFP Removing an SFP Remove an SFP to replace it or to commission it elsewhere. Before you begin • Wear an antistatic wrist strap. Danger: Risk of eye injury by laser Fiber optic equipment can emit laser or infrared light that can injure your eyes. Never look into an optical fiber or connector port. Always assume that fiber optic cables connect to a light source. Electrostatic alert: ESD can damage electronic circuits.
SFP specifications Important: If you discard the SFP transceiver, dispose of it according to all national laws and regulations. SFP specifications This section provides technical specifications for the supported small form factor pluggable (SFP) models. Use this information to aid in proper network design. The specifications in this section meet or exceed those specified in the applicable IEEE standards, where they exist.
SFP Table 2: General SFP specifications Parameter Description Dimensions (H x W x D) 8.5 x 13.4 x 56.4 millimeters (0.33 x 0.53 x 2.22 inches), unless otherwise stated. Operating temperature –5 to 85 ºC for RoHS -E6 models Storage temperature –40 to 85 ºC Maximum supply current 300 mA, unless otherwise stated Maximum power consumption 1.0 W, unless otherwise stated Supported SFP transceivers The following section provides specifications for the supported SFP transceivers.
SFP specifications Table 4: 1000BASE-SX SFP DDI (550 m) specifications Parameter Specifications Maximum electrical power consumption 1 watt (W) Connector Duplex LC Cabling MMF Data rate 1.0 Gbps Line rate (8B/10B code) 1.25 Gbps Link optical power budget 7.5 dB Transmitter characteristics Launch power –9.5 to –4.
SFP 1000BASE-XD DDI 1310 nm SFP specifications The following table describes the 1000BASE-XD DDI SFP. This SFP operates at 1310 nm and has a reach of up to 40 km. The part number is AA1419050-E6. Table 6: 1000BASE-XD DDI 1310 nm SFP specifications Parameter Specifications Maximum electrical power consumption 1.0 W Connectors Duplex LC Cabling SMF, 9 μm Data rate 1.0 Gbps Line rate (8B/10B) code 1.25 Gbps Link optical power budget 18 dB Transmitter characteristics Launch power –4.
SFP specifications Parameter Specification Maximum dispersion power penalty 2 dB at 40 km Minimum attenuation between transmit and receive ports 3 dB Transmitter characteristics Launch power –2.0 to 3.0 dBm Receiver characteristics Receiver sensitivity –24 dBm Maximum receiver power 0 dBm 1000BASE-ZX DDI 1550 nm SFP specifications The following table describes the 1000BASE-ZX CWDM SFP transceiver. This SFP transceiver operates at 1550 nm and has a reach of up to 70 km.
SFP 1000BASE-XD DDI CWDM (40 km) SFP specifications The following table describes specifications for 1000BASE-XD DDI CWDM SFP transceivers numbered AA1419053-E6 to AA1419060-E6. Warning: Risk of equipment damage To prevent damage to the optical receiver, ensure that at least 4 dB of attenuation exists between the transmit and receive ports. Table 9: 1000BASE-XD CWDM SFP DDI (40 km) specifications Parameter Specifications Maximum electrical power consumption 1.
SFP specifications Parameter Specifications Data rate 1.0 Gbps Line rate (8B/10B code) 1.25 Gbps Link optical power budget 24 dB Maximum dispersion power penalty 2 dB at 70 km Transmitter characteristics Launch power 0 to 5.0 dBm Receiver characteristics Receiver sensitivity –24 dBm Maximum receiver power –3.0 dBm 1000BASE-BX bidirectional SFP transceivers The 1000BASE-BX bidirectional DDI SFP transceivers provides gigabit Ethernet connectivity over a single fiber.
SFP Table 11: 1000BASE-BX SFP transceivers Reach 1310 nm 1490 nm 10 km AA1419069-E6 AA1419070-E6 40 km AA1419076-E6 AA1419077-E6 1000BASE-BX10 bidirectional DDI SFP specifications The 1000BASE-BX10 SFP transceivers (part numbers AA1419069-E6 and AA1419070-E6) can attain a reach of up to 10 km. The following table describes standards, connectors, cabling, and distances for the 1000BASEBX10 SFP transceiver. Table 12: IEEE 802.
SFP specifications Parameter Specifications Data rate 1.0 Gbps Line rate (8B/10B code) 1.25 Gbps Distance Up to 40 km with SMF Wavelength 1310 nm and 1490 nm Link optical power budget 20.0 dB Maximum transmitter and dispersion power penalty 3.3 dB Transmitter characteristics Maximum launch power 3.0 dBm Minimum launch power –3.0 dBm Receiver characteristics Maximum receiver sensitivity –23 dBm Maximum input power (maximum average receive power) –3.
SFP Parameter Specification Launch power 0 to 5.0 dBm Receiver characteristics Receiver sensitivity –30 dBm Maximum receiver power –9.0 dBm 100BASE-FX SFP specifications The 100BASE-FX SFP provides 100 Mbps Ethernet Carrier Sense Multiple Access with Collision Detection (CSMA-CD) connectivity using multimode optical fiber. The part number for this model is AA1419074-E6 You can use this device only in Avaya VSP 4000 SFP slots (47 and 48).
Chapter 5: SFP+ This chapter provides installation procedures and specifications for small form factor pluggable plus (SFP+) transceivers. SFP+ transceivers This section describes how to select and install small form factor pluggable plus (SFP+) transceivers. Use an SFP+ transceiver to connect a device motherboard to fiber optic or direct attached cables, up to 15 meters in length.
SFP+ Job aid SFP+ transceivers are hot-swappable input and output enhancement components that allow 10 gigabit connections. All Avaya SFP+ transceivers use Lucent connectors (LC) to provide precision keying and low interface losses. The following table lists and describes the Avaya SFP+ models.
SFP+ transceivers Before you begin Important: Do not install an SFP+ transceiver in an SFP slot. The two transceivers look the same but function differently. • Verify that the SFP+ transceiver is the correct model for your network configuration. • Before you install the optical connector, ensure it is clean. Danger: Risk of eye injury by laser Fiber optic equipment can emit laser or infrared light that can injure your eyes. Never look into an optical fiber or connector port.
SFP+ appearance. In the following figure, the SFP+ transceiver uses the bore plug. Pull the bail to release the device. Removing an SFP+ Remove an SFP+ transceiver to replace it or to commission it elsewhere. Before you begin • Wear an antistatic wrist strap. Danger: Risk of eye injury by laser Fiber optic equipment can emit laser or infrared light that can injure your eyes. Never look into an optical fiber or connector port. Always assume that fiber optic cables connect to a light source.
SFP+ specifications SFP+ specifications This section provides technical specifications for the supported 10-gigabit Ethernet SFP+ models. Use these specifications to aid in network design. The specifications in this section are a subset of the IEEE standard 802.3–2012 specifications. For more information, see the associated IEEE 802.3 standards document. All Avaya SFP+ transceivers meet or exceed these standards. The Avaya VSP 4000 supports SFP+ transceivers on fiber ports 49 and 50.
SFP+ General SFP+ specifications The following table describes general SFP+ specifications. Table 17: General SFP+ specifications Parameter Specifications Dimensions (H x W x D) 8.5 x 13.4 x 56.4 millimeters (0.33 x 0.53 x 2.22 inches), unless otherwise stated.
SFP+ specifications Parameter Specifications Minimum optical modulation amplitude –5.2 dBm Minimum extinction ratio 3.5 dB Maximum optical return loss tolerance –12 dB Maximum transmitter reflectance –12 dB Receiver characteristics Line rate (nominal) Average receive power for BER 10GBASE-LR 10.3125 Gbps ± 100 ppm (10 GbE) 10-12 –14.4 dBm to 0.5 dBm Receiver damage threshold 1.5 dBm Maximum receiver sensitivity in OMA –12.
SFP+ Parameter Specifications Minimum optical modulation amplitude –5.2 dBm Minimum extinction ratio 3.5 dB Maximum optical return loss tolerance –12 dB Maximum transmitter reflectance –12 dB Receiver characteristics Line rate (nominal) 10GBASE-LR 10.3125 Gbps ± 100 ppm (10 GbE) Average receive power for BER 10-12 –14.4 dBm to 0.5 dBm Maximum average receive power for damage 1.5 dBm Maximum receiver sensitivity in OMA –12.
SFP+ specifications Parameter Specifications Maximum average launch power of OFF transmitter –30 dBm Minimum extinction ratio 3.0 dB Maximum RIN12OMA –128 dB/Hz Maximum optical return loss tolerance –21 dB Receiver characteristics Average receive power for BER 10-12 – 15.8 dBm to –1.0 dBm Maximum receive power for damage 4.0 dBm Maximum receiver sensitivity in OMA –14.1 dBm Maximum receiver reflectance –26 dB Stressed receiver sensitivity in OMA –11.
SFP+ Parameter Specifications Distance Using 62.5 µm MMF optic cable: • 160 MHz-km fiber: 2 to 26 m • 200 MHz-km fiber: 2 to 33 m Using 50 µm MMF optic cable: • 400 MHz-km fiber: 2 to 66 m • 500 MHz-km fiber: 2 to 82 m • 2000 MHz-km fiber: 2 to 300 m • 4700 MHz-km fiber (OM4): 2 to 400 m Link optical power budget 7.3 dB Maximum transmitter and dispersion penalty 3.9 dB at 300 m Transmitter characteristics Root-mean-square spectral width 0.05 to 0.40 nm Launch power –7.3 to –1.
SFP+ specifications Table 22: IEEE 802.3ae 10GBase–SR/SW SFP+ (0 °C to +85 °C) transceiver specifications Parameter Specifications Data rate 10 Gbps Line rate (64B/66B code) 10.3125 gigabits per second (Gbps) ± 100 parts per million (ppm) Center wavelength range 840 to 860 nanometers (nm), nominal 850 nm Distance Using 62.
SFP+ The reach for this SFP+ transceiver is up to 70 km* at a wavelength of 1550 nm. Table 23: 10GBASE-ZR/ZW SFP+ specifications Parameter Specifications Line rate (nominal) 10GBASE-ZR 10.3125 Gbps ±100 ppm (10 GbE) Distance Up to 70 km * Link optical power budget 24 dB Dispersion power penalty 3.0 dB at 70 km (G.
SFP+ specifications Parameter Specifications Line rate (64B/66B code) 10.3125 Gbps ± 100 ppm Center wavelength range 1260 to 1355 nm; 1310 nm nominal Distance Up to 220 m Link optical power budget 1.7 to 1.9 dB Maximum transmitter waveform and dispersion penalty (TWDP) 4.7 dB Transmitter characteristics Average launch power –6.5 to 0.5 dBm Peak launch power 3 dBm Root-mean-square spectral width 2.4 to 4 nm Launch power in OMA –4.5 to 1.5 dBm Minimum extinction ratio 3.
SFP+ Fiber type (core diameter and OFL bandwidth) Range Maximum channel insertion loss 50 μm Up to 100 m 1.7 dB Up to 220 m 1.
SFP+ specifications Table 27: Part number and center wavelength assignment Part number Center wavelength assignment Reach Minimum insertion loss AA1403153-E6 1471 nm Up to 40 km 5 dB between Tx and Rx AA1403154-E6 1491 nm Up to 40 km 5 dB between Tx and Rx AA1403155-E6 1511 nm Up to 40 km 5 dB between Tx and Rx AA1403156-E6 1531 nm Up to 40 km 5 dB between Tx and Rx AA1403157-E6 1551 nm Up to 40 km 5 dB between Tx and Rx AA1403158-E6 1571 nm Up to 40 km 5 dB between Tx and Rx AA
SFP+ Parameter Specifications IEEE 10GBASE-ER eye mask margin 10% Receiver characteristics 48 Wavelength (requirement) 1450 nm to 1620 nm Receiver sensitivity (unstressed), OMA –14.1 dBm, P_OMA IEEE 10GBASE-ER Stressed Rx Sensitivity –11.3 dBm, P_OMA Receiver overload –1 dBm, P_avg Receiver reflectance –26 dB Receiver damage threshold +4 dBm Installing Transceivers and Optical components on Avaya VSP 4000 Comments? infodev@avaya.
Chapter 6: Translations of safety messages Class A electromagnetic interference warning statement Warning: Risk of electromagnetic interference This device is a Class A product. Operation of this equipment in a residential area is likely to cause harmful interference, in which case users are required to take appropriate measures necessary to correct the interference at their own expense. Warning: AVERTISSEMENT Le périphérique est un produit de Classe A.
Translations of safety messages Warning: AVVISO Questo dispositivo è un prodotto di Classe A. Il funzionamento di questo apparecchio in aree residenziali potrebbe causare interferenze dannose, nel cui caso agli utenti verrà richiesto di adottare tutte le misure necessarie per porre rimedio alle interferenze a proprie spese. Electrostatic discharge caution statement Electrostatic alert: ELECTROSTATIC ALERT ESD can damage electronic circuits.
Laser eye safety danger statement Electrostatic alert: AVVISO ELETTROSTATICO Le scariche elettrostatiche (ESD) possono danneggiare i circuiti elettronici. Non toccare i componenti elettronici senza aver prima indossato un braccialetto antistatico o un altro dispositivo in grado di dissipare l'energia statica. Laser eye safety danger statement Danger: Risk of eye injury by laser Fiber optic equipment can emit laser or infrared light that can injure your eyes.
Translations of safety messages O laser pode causar ferimentos no olho O equipamento de fibra ótica pode emitir laser ou luz infravermelha que pode causar danos a sua vista. Nunca olhe para dentro da fibra ótica ou da porta do conector. Tenha sempre em mente que os cabos de fibra ótica estão ligados a uma fonte de luz. Danger: PERICOLO Rischio di ustioni agli occhi dovute al laser Le apparecchiature con fibre ottiche possono emettere raggi laser o infrarossi in grado di provocare ferite agli occhi.
Connector cleaning safety danger statement Danger: PERIGO Risco de ferimento nos olhos Ao inspecionar um conector, verifique se as fontes luminosas estão desligadas. A fonte luminosa usada nos cabos de fibra ótica pode causar danos a seus olhos. Danger: PERICOLO Rischio di lesioni agli occhi Quando si esamina un connettore, assicurarsi che le sorgenti di luce siano spente. La sorgente di luce utilizzata nei cavi a fibre ottiche potrebbero danneggiare gli occhi.
Translations of safety messages arbeiten. Zum Schutz vor Augenirritationen tragen Sie eine Schutzbrille, wenn Sie mit Isopropanol arbeiten. Danger: PELIGRO Riesgo de lesiones Cuando inspeccione un conector, controle que las fuentes de luz estén apagadas. La fuente de luz que utilizan los cables de fibra óptica puede ocasionar daños en la vista. Cuando trabaje con el pulverizador de aire envasado, utilice gafas de seguridad para evitar el ingreso de residuos en los ojos.
Optical fiber connector damage warning statement Warning: AVERTISSEMENT Risques d'endommagement de l'équipement N'exercez pas de pression sur les câbles de fibres optiques. Ne placez pas de câbles de fibres optiques dans la même caisse ou dans le même fourreau que des câbles électriques lourds car leur poids risquerait de les endommager. Warning: WARNUNG Risiko von Geräteschäden Das Glasfaserkabel darf nicht zerdrückt werden.
Translations of safety messages To prevent further contamination, clean fiber optic equipment only when you see evidence of contamination. To prevent contamination, cover the optical ports of all active devices with a dust cap or optical connector. To avoid the transfer of oil or other contaminants from your fingers to the end face of the ferrule, handle connectors with care.
SFP damage warning statement Warning: AVISO Risco de danos ao equipamento Para evitar contaminação futura, limpe o equipamento ótico apenas quando houver evidência de contaminação. Para evitar a contaminação, verifique se as portas óticas de todos os dispositivos ativos estão cobertas com uma proteção contra pó ou conector ótico. Para evitar a transferência de óleo ou outro agente contaminador de seus dedos para a extremidade final da ponteira, manuseie os conectores com cuidado.
Translations of safety messages Die SFPs sind so konstruiert, dass ein falsches Einsetzen verhindert wird. Lässt sich ein SFP auch auf Druck hin nicht einsetzen, versuchen Sie nicht, es gewaltsam einzusetzen, sondern drehen Sie es um, und setzen Sie es erneut ein. Warning: ADVERTENCIA Riesgo de daños en los equipos Los módulos SFP cuentan con cuñas que no permiten insertarlos de forma incorrecta. Si el módulo SFP opone resistencia a la presión, no lo fuerce; gírelo e insértelo nuevamente.
Appendix A: Port numbering Port numbering A port number includes the slot location of the module in the chassis, as well as the port position. The following diagrams illustrate the components on the front panels of the Avaya VSP 4000 switches. Figure 4: VSP 4850GTS 1. VSP 4000 USB cover 2. Switch LEDs 3. 10/100/1000 ports (LEDs above ports) 4. Combo port SFP slots. Supports Avaya 1G SFPs and 100Base low speed SFPs. 5. SFP+ slots. Supports Avaya’s 1G SFPs and 10G SFP+s. 6.
Port numbering 1. VSP 4000 USB cover 2. Switch LEDs 3. 10/100/1000 PoE+ ports (LEDs above ports) 4. Combo port SFP slots. Supports Avaya 1G SFPs and 100Base low speed SFPs. 5. SFP+ slots. Supports Avaya’s 1G SFPs and 10G SFP+s. 6. Console Port Figure 6: VSP 4450GSX-PWR+ 1. VSP 4000 USB port 2. Switch LEDs 3. 10/100/1000 Base TX RJ-45 ports with PoE+ (LEDs above ports) 4. 100/1000 Mbps SFP transciever modules 5. 1/10G SFP + ports 6. Console Port Figure 7: VSP 4450GTX-HT-PWR+ 1.
Port numbering 4. Combo port SFP slots. Supports Avaya 1G SFPs and 100Base low speed SFPs 5. SFP+ slots. Supports Avaya 1G SFPs and 10G SFP+s 6. Console Port 7. Field-replaceable 1000W AC power supply unit (PSU) 8. Second field-replaceable AC power supply unit for redundancy or additional PoE Figure 8: VSP 4450GSX-DC 1. VSP 4000 USB cover 2. Switch LEDs 3. 10/100/1000 ports (LEDs above ports) 4. Combo port SFP slots. Supports Avaya 1G SFPs and 100Base low speed SFPs. 5. SFP+ slots.
Glossary attenuation The decrease in signal strength in an optical fiber caused by absorption and scattering. Avaya command line interface (ACLI) A textual user interface. When you use ACLI, you respond to a prompt by typing a command. After you enter the command, you receive a system response. bit error rate (BER) The ratio of the number of bit errors to the total number of bits transmitted in a specific time interval.
media media A substance that transmits data between ports; usually fiber optic cables or category 5 unshielded twisted pair (UTP) copper wires. metropolitan area network (MAN) A broadband network that covers an area larger than a Local Area Network. multimode fiber (MMF) A fiber with a core diameter larger than the wavelength of light transmitted that you can use to propagate many modes of light. Commonly used with LED sources for low speed and short distance lengths.
