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Copyright © 2006 Nortel Networks. All Rights Reserved. The information in this document is subject to change without notice. The statements, configurations, technical data, and recommendations in this document are believed to be accurate and reliable, but are presented without express or implied warranty. Users must take full responsibility for their applications of any products specified in this document. The information in this document is proprietary to Nortel Networks Inc.
Caution: Only qualified technicians should install this equipment. Place all printed circuit boards on an antistatic mat until you are ready to install them. If you do not have an antistatic mat, wear a discharge leash to free yourself of static before touching any of the printed circuit boards, or free yourself of static by touching a grounded metal object before handling a printed circuit board. Product Safety Meets requirements of: CSA 22.2 No. 950-M95/UL1950, 3rd ed.
Caution: L’équipement à fibre optique peut émettre des rayons laser ou infrarouges qui risquent d’entraîner des lésions oculaires. Ne jamais regarder dans le port d’un connecteur ou d’un câble à fibre optique. Toujours supposer que les câbles à fibre optique sont raccordés à une source lumineuse. Caution: Los equipos de fibra óptica pueden emitir radiaciones de láser o infrarrojas que pueden dañar los ojos. No mire nunca en el interior de una fibra óptica ni de un puerto de conexión.
Required Tool These procedures require a Phillips screwdriver #1. Introduction The Media Dependent Adapters (MDAs) for the Nortel* 8672ATM, 8672ATME, and 8672ATMM Modules are modular port adapters that you install on the module. Each of these modules have two slots for MDAs.
Figure 2 OC-3c/STM-1 MDA: 8672ATME and 8672ATMM Modules 9726EA Figure 3 DS-3 MDA: 8672ATME and 8672ATMM Modules TX RX TX RX TX TX RX RX 10530EB Each MDA has ports for connection to an ATM network. You can mix types of MDAs to achieve flexibility in connectivity types. Table 1 shows the available types of MDAs for the 8672ATM, 8672ATME, and 8672ATMM Modules.
Table 1 MDAs for the 8672ATM, 8672ATME and 8672ATMM Modules Port type Model OC-12c/STM-4 DS1304004 Multimode fiber Duplex SC DS1304005 Single mode fiber Duplex SC DS1304006 Multimode fiber MT-RJ DS1304007 Single mode fiber MT-RJ DS1304002 75 ohm coaxial BNC OC-3c/STM-1 DS-3 Cable type Connector type Note: The OC-3c/STM-1 and OC-12c/STM-4 MDAs support concatenated transmission.
Figure 4 Product label for the 8672 ATME and 8672ATMM Module MDA- OC-3c/STM-1 and OC-12c/STM-4 8769EB This manual provides the following information: Topic Page Installing an MDA 7 Replacing an MDA 11 Connecting fiber cables 13 Connecting coaxial cables 18 MDA Specifications 19 LEDs 23 6
Installing an MDA Warning: You cannot hot-swap an MDA. You must remove the 8672ATME or 8672ATMM Module, install the MDA, and then reinstall the module. For more information about removing and installing the 8672ATME and 8672ATMM Modules, refer to Installing 8600 Switch Modules. To install an MDA: 1 Lay the 8672ATME or 8672ATMM Module (Figure 5) on a flat, static-free surface.
Figure 6 Removing the MDA slot covers 9905FA 3 Line up the MDA with the front of the 8672ATME or 8672ATMM Module, positioning the MDA so that the front aligns with the front of the 8672ATME or 8672ATMM Module (Figure 7).
4 Align the four holes on the MDA with the mounting posts on the 8672ATME or 8672ATMM Module (Figure 8). Figure 8 Aligning the MDA with the posts of the module MDA 2 9881FA 5 Press firmly on the MDA in the middle of the back to seat the MDA in the mounting posts on the module (Figure 9). Apply about 20 pounds of pressure.
When the MDA is seated properly, the posts of the module are visible in the holes of the MDA. 6 Insert the Phillips pan head screws through the holes (Figure 10). Use the #1 Phillips screwdriver to tighten the screws. Note: Tighten the rear screws first before you tighten the front screws. Figure 10 Tightening the screws 9883FA 7 For each MDA installed, attach the supplied laser product label to the front panel of the host module, immediately below the MDA.
Replacing an MDA Warning: You cannot hot-swap an MDA. You must remove the 8672ATME or 8672ATMM Module, install the MDA, and then reinstall the module. For more information about removing and installing the 8672ATME and 8672ATMM Modules, refer to Installing 8600 Switch Modules. To replace an MDA: 1 Remove the 8672ATME or 8672ATMM Module from the chassis and lay it on a flat, static-free surface. For information about removing a module from the chassis, refer to Installing 8600 Switch Modules.
3 Place the palm of your hand on top of the MDA, and cup your fingers around the back of the MDA. Lift the MDA enough to loosen it from the mounting posts (Figure 12). Figure 12 Loosening the MDA from the mounting posts 9885FA 4 When the MDA is loosened from the mounting posts, hold the sheet metal by each side and lift the MDA straight up, being careful not to catch the lip of the MDA on the module (Figure 13). Store the MDA in a static-free container for later use.
5 Refer to “Installing an MDA” on page 7 for instructions on installing the replacement MDA Note: If you do not plan to install a replacement MDA, place the slot cover on the MDA slot and tighten the 2 screws. Connecting fiber cables The OC-12c/STM-4 MDA uses duplex SC connectors (Figure 14), and the OC-3c/STM-1 MDA uses MT-RJ connectors (Figure 15).
Figure 15 OC-3c MDA/STM-1 MT-RJ connector with dust cap 9889FA To connect fiber cables: 1 Remove the protective dust plug from the connector on the installed MDA (Figure 16 or Figure 17). Store the dust plug for later use.
Figure 17 Removing the dust plug from the OC-3c/STM-1 MDA (MT-RJ) connector MDA 1 9891FA 2 Remove the protective dust caps from the connector on the fiber cable (Figure 18 or Figure 19). Store the dust caps for later use.
Figure 19 Removing the dust cap from the MT-RJ fiber cable connector 9890FA 3 Hold the fiber cable connector so the keyed surface will insert easily into the MDA connector. Carefully insert the cable connector into the MDA connector and push gently (Figure 20 or Figure 21).
Figure 21 Inserting the cable connector into the OC-3c/STM-1 MDA (MT-RJ) connector MDA 1 9892FA 17
Connecting coaxial cables The DS-3 MDA uses BNC connectors (Figure 22). To connect a coaxial cable to a DS-3 MDA: 1 Push the coaxial cable onto the DS-3 connector (Figure 22). Figure 22 Connecting the coaxial cable to a DS-3 MDA 10551FB 2 Turn the coaxial cable to the right until the key on the DS-3 connector clicks into the notch on the coaxial cable.
MDA Specifications The OC-3c/STM-1 MDA uses SONET STS-3c/SDH STM-1 1300 nm optical transceivers with MT-RJ fiber optic connectors and either single mode fiber (SMF) or multimode fiber (MMF) cabling. Table 2 describes the 8672ATME and 8672ATMM Modules MDA- OC-3c and OC-12c specifications. Table 2 8672ATME and 8672ATMM Modules MDA specifications- OC-3c/STM-1 and OC-12c/STM-4 Pulse repetition rate Port type Operating wavelength Operating power OC-12c/STM-4 1274-1356 nm -14 to -20 dBm 622.
Table 3 describes the OC-3c/STM-1 MDA 8672ATME and 8672ATMM Modules specifications. Table 3 OC-3c/STM-1 MDA specifications: 8672ATME and 8672ATMM Modules Parameter SMF description MMF description Physical media 9/125 um 62.
The OC-12c/STM-4 MDA uses SONET STS-3c/SDH STM-1 1300 nm optical transceivers with duplex SC-type fiber optic connectors and either single mode fiber (SMF) or multimode fiber (MMF) cabling. Table 4 describes the OC-12c/STM-4 MDA 8672ATME and 8672ATMM Modules specifications. Table 4 OC-12c/STM-4 MDA specifications: 8672ATME and 8672ATMM Modules Parameter SMF description MMF description Physical media 9/125 um 62.
The DS-3 MDA uses a 75 ohm coaxial cable. Table 5 describes the DS-3 MDA.
LEDs The MDAs have two bicolor LEDs on each port: one marked TX (transmit) and one marked RX (receive). Table 6 describes the LEDs. Table 6 MDA LED indications Label Color State Meaning TX RX Green Steady Indicates network activity for the corresponding port. A very low level of network activity (approximately 1-5 pps) can cause the LED to blink. — Off The port is not transmitting data (no network activity). Amber Blinking The port is out of order; the administrative state is down.
1. Remote defect indications (RDI) indicates that a failure has occurred at the far end of the network. In ATM, when the physical layer detects loss of signal or cell synchronization, RDI cells are used to report a VPC/ VCC failure. RDI cells are sent upstream by a VPC/VCC endpoint to notify the source VPC/VCC endpoint of the downstream failure.
