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This chapter provides installation procedures for a subtended network with subtended node multiplexer chassis (MCs) that connects to a subtending host MC in a Cisco 6100 Series system.
 | Warning Only trained and qualified personnel should be allowed to install, replace, or service this equipment. |
| Warning Systems using a Cisco 6100 chassis must connect to the network through a POTS splitter chassis (PSC) to provide the secondary lightning protection required by Network Equipment Building Systems (NEBS). |
For additional compliance and safety information, refer to the Regulatory Compliance and Safety Information for the Cisco 6100 Series System document.
For detailed information on the following, refer to the Cisco 6100 Series User Guide:
In this guide, the term subtending refers to the host MC, and subtended refers to the downstream MC in a subtended network.
Subtending
The subtending host MC is the one that is connected directly to the ATM switch. You can have more than one subtending host MC in your subtending tree. There is a subtending host MC at the top of the subtending tree. Each additional subtending host MC requires a DS3 subtend host module (STM) installed in slot 9, as well as a DS3 network interface (NI) module installed in slot 10.
You can subtend an MC to three levels and up to six MCs, all connecting through one subtending host MC to the ATM backbone (Figure 6-1).
Figure 6-2 shows a subtending host MC and a subtended node MC with corresponding slot number assignments.
In Figure 6-2, the DS3 STM is installed in slot 9 of the subtending host MC. A NI module is located in slot 10.
If you have
When you install a subtended network for a Direct Connect configuration, be sure that you follow the installation procedures in proper sequence. Table 6-1 is a checklist of the installation steps in the order in which they should occur. Subsequent subsections describe the installation steps.
 | Caution Proper ESD protection is required whenever you handle Cisco Digital Subscriber Line Access Multiplexer (DSLAM) equipment. Installation and maintenance personnel should be properly grounded using ground straps to eliminate the risk of ESD damage to the equipment. Modules are subject to ESD damage whenever they are removed from the chassis. |
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| 1xTU-C is a generic term referring to a Transmission unit - central office, which is either a CAP ATU-C, DMT-2 ATU-C, or STU-C module. 2NI = network interface |
Before you install the MCs with a subtended configuration, install and cable the MCs with one of the following configurations:
The DS3 subtending card has two sets of DS3 75-ohm coaxial DS3 Bayonet-Neill-Concelman (BNC) connectors. Each set consists of a transmit and a receive connector. There are four jumpers that will already be installed on the DS3 subtending card. Use the jumpers to connect the DS3 BNC shield to the chassis ground. Figure 6-3 shows the DS3 BNC connectors and DS3 jumpers on the DS3 subtending card.
Figure 6-4 shows the location of the DS3 subtending card in relation to the DS3 system I/O card on the MC backplane.
You can install a DS3 subtending card on:
| Caution Proper ESD protection is required each time you handle Cisco DSLAM equipment. Installation and maintenance personnel should be properly grounded using ground straps to eliminate the risk of ESD damage to the equipment. Modules are subject to ESD damage each time they are removed from the chassis. |
To connect the DS3 subtending card to the MC backplane, complete the following steps:
Step 1 Locate and remove two of the backplane screws currently used to hold the MC backplane to the chassis. These backplane screws are located above and below the DS3 subtending card connector (J48). Keep these backplane screws for use when you install the DS3 subtending card.
Step 2 There are two standoff screws included with the DS3 subtending card. Using a one-quarter inch socket driver or wrench, screw the two standoff screws into the locations formerly occupied by the two screws you removed in Step 1. Tighten the standoff screws using the one-quarter inch socket driver or wrench (Figure 6-5).
| Caution Be careful when you insert the standoff screws into the screw holes on the backplane so that the backplane circuitry does not become damaged. |
Step 3 Position and align the holes on the DS3 subtending card over the two standoff screws. The DS3 subtending card attaches to connector J48, a 96-pin DIN connector, on the subtending host MC backplane.
Step 4 Using a Phillips-head screwdriver and the backplane screws you removed in Step 1, attach the DS3 subtending card to the backplane.
Coaxial connections for DS3 cabling are located on the DS3 system I/O card. The transmit and receive DS3 BNC connectors on the DS3 subtending card are connected to the transmit and receive DS3 BNC connectors on the DS3 system I/O card (Figure 6-6). See Figure 3-18 for cabling for the DS3 system I/O card earlier than Release 2.4.0 of the Cisco 6100 Series system.
Use the following steps to cable the DS3 system I/O card to the DS3 subtending card:
Step 1 On the subtending host MC backplane, attach one end of a cable to the transmit DS3 BNC connector (TX1) on the DS3 subtending card.
Step 2 To reduce the radiation/EMI susceptibility to high frequency noise between 30 and 200 MHz, add ferrites to the coaxial cables that you use to cable the DS3 subtending card to the DS3 system I/O card. Use either the ferrite shipped with the DS3 NI module (type 43) or ferrites that use ferrite material type 43 or 44 with an impedance greater than 200 ohms +/- 20 percent at 100 MHz.
If you are using
Step 3 Attach a ferrite as close as possible to the remaining end of the cable. This cable connects to the receive DS3 BNC connector on the DS3 system I/O card (see Figure 6-7 or Figure 6-8 for ferrite installation). Tie wrap the cable directly behind the ferrite.
Step 4 On the subtended node MC backplane, attach the end of the cable used in Step 3 to the receive DS3 BNC connector (RX) on the DS3 system I/O card.
Step 5 On the subtending host MC backplane, attach one end of a cable to the receive DS3 BNC connector (RX1) on the DS3 subtending card.
Step 6 Attach the ferrite as close as possible to the receive DS3 BNC connector on the DS3 subtending card (see Figure 6-7 or Figure 6-8 for ferrite installation). Tie wrap the cable directly behind the ferrite.
Step 7 Attach a ferrite as close as possible to the remaining end of the cable. This cable connects to the transmit DS3 BNC connector on the DS3 system I/O card (see Figure 6-7 or Figure 6-8 for ferrite installation). Tie wrap the cable directly behind the ferrite.
Step 8 On the subtended node MC backplane, attach the end of the cable used in Step 7 to the transmit DS3 BNC connector (TX) on the DS3 system I/O card.
Step 9 The transmit and receive cables coming from the DS3 subtending card should be tie wrapped where the cables meet after coming from the ferrites and every 1 foot thereafter for a total of 15 feet (see Figure 6-9).
Step 10 Tie wrap the transmit and receive cables coming from the DS3 system I/O card at the location in which the cables meet after coming from the ferrites, and every 1 foot thereafter, for a total of 15 feet (see Figure 6-10).
Step 11 Repeat Steps 1 through 10 for each subtending host MC to subtended node MC connection. If you have one subtending host MC with two subtending node MCs, the second subtending node MC connects to the TX2 and RX2 DS3 BNC connectors on the DS3 subtending card.
Without the modules installed in any of the MCs or PSCs, apply power to the system by
| Caution If the modules are installed when you apply power to the system, you could damage the modules and the chassis. |
In a Direct Connect with a PSC configuration
In a Direct Connect without a PSC configuration
| Caution Check the polarity of the -48 VDC connections to each chassis by attaching a voltmeter with the minus lead on -48RTN and the plus lead on -48V_A. Ensure that the meter reads between -36 VDC and -60 VDC. If your voltmeter shows a positive voltage, the power inputs might be reversed. If the voltmeter shows a negative voltage that is out of the -36 VDC to -60 VDC range, check the power supply for failure or check for a blown fuse in the fuse and alarm panel. |
Verify that the fans are operational by locating the LED on the front of each fan. If the LED is
The fans should be operational before you install the modules.
| Caution It is important that the MC cooling fans run continuously. The system could suffer thermal damage if the fans stop running for more than 30 minutes. |
| Warning The power supply circuitry for the Cisco DSLAM equipment can constitute an energy hazard. Before you install or replace the equipment, remove all jewelry (including rings, necklaces, and watches). Metal objects can come into contact with exposed power supply wiring or circuitry inside the DSLAM equipment. This could cause the metal objects to heat up and cause serious burns or weld the metal object to the equipment. |
| Warning Do not reach into a vacant slot or chassis while you install or removing a module or a fan. Exposed circuitry could constitute an energy hazard. |
| Caution Proper ESD protection is required each time you handle Cisco DSLAM equipment. Installation and maintenance personnel should be properly grounded using ground straps to eliminate the risk of ESD damage to the equipment. Modules are subject to ESD damage each time they are removed from the chassis. |
If the MC ships with any modules installed, reseat the modules to verify the power connection and to ensure that ViewRunner discovery feature works properly. Refer to the ViewRunner for Windows Provisioning and Operation Manual for more information on the discovery feature.
To reseat the xTU-C modules, complete the following steps:
Step 1 Lift up on the ejector tab.
Step 2 As you lift up the ejector tab and gently apply pressure to the bottom of the faceplate, push the module into the slot.
Step 3 Push on the faceplate of each module to fully seat the module.
Step 4 After the module is fully seated in the slot, press down on the ejector tab to secure the module.
Step 5 After the brief self-test, verify that the STATUS LED is solid green.
Step 6 Using the same procedure, reseat the remaining xTU-C modules.
| Caution Proper ESD protection is required each time you handle Cisco DSLAM equipment. Installation and maintenance personnel should be properly grounded using ground straps to eliminate the risk of ESD damage to the equipment. Modules are subject to ESD damage each time they are removed from the chassis. |
Install the Cisco 6100 Series modules in the following order to verify the power connection and to ensure that the ViewRunner discovery feature works properly. Refer to the ViewRunner for Windows Provisioning and Operation Manual for more information on the discovery feature.
| Caution Installing the modules in the chassis with the power leads reversed can damage the modules. |
| Warning The power supply circuitry for the Cisco DSLAM equipment can constitute an energy hazard. Before you install or replace the equipment, remove all jewelry (including rings, necklaces, and watches). Metal objects can come into contact with exposed power supply wiring or circuitry inside the DSLAM equipment. This could cause the metal objects to heat up and cause serious burns or weld the metal object to the equipment. |
| Warning Do not reach into a vacant slot or chassis while you install or removing a module or a fan. Exposed circuitry could constitute an energy hazard. |
To install the modules in the MC and PSC (as necessary), follow these steps in the order shown:
Step 1 To install the xTU-C modules in the MC, complete the following:
(a) Vertically align the module edge with the module guides at the top and bottom of slot 1 of the MC.
(b) Lift up on the ejector tab.
(c) As you lift up the ejector tab and gently apply pressure to the bottom of the faceplate, push the module into the slot.
(d) Push on the faceplate of each module to fully seat the module.
(e) After the module is fully seated in slot 1, press down on the ejector tab to secure the module.
(f) After the brief self-test, verify that the STATUS LED is solid green.
(g) Using the same procedure, install the remaining xTU-C modules. Repeat for each module. The xTU-C modules are installed in slots 1 through 8, 13 through 28, and 31 through 38.
Step 2 To install the NI module in the MC, complete the following:
(a) Inspect the NI module. Verify that the two daughterboards are fully seated on the main board.
(b) Verify that slots 10 and 11 of the MC have no bent pins.
(c) Vertically align the module edge with the module guides at the top and bottom of slot 10 of the MC.
(d) Lift up on the ejector tabs.
(e) As you lift up the ejector tabs and gently apply pressure to the faceplate, push the module into the slot.
(f) Push on the faceplate of each module to fully seat the module.
(g) After the module is fully seated in slot 10, press down on the ejector tabs to secure the module.
(h) The NI module self-test takes approximately 2 minutes. After that time, verify that the ACTIVE LED is solid green.
(i) When you install a DS3 NI module, attach a short coaxial cable between the DS3 system I/O card transmit and receive connectors to loop back the interface and prevent alarms when installing the SC module.
When you install an OC-3c NI module, attach a short multi-mode or single-mode fiber to loop back the interface.
For additional information on connecting the NI module to the network, see the "Connect the NI Module to the Network" section.
Step 3 To install the POTS splitter modules in the PSC, complete the following:
(a) Vertically align the module edge with the module guides at the top and bottom of slot 1 of the PSC.
(b) Lift up on the ejector tab.
(c) As you lift up the ejector tab and gently apply pressure to the bottom of the faceplate, push the module into the slot.
(d) Push on the faceplate of each module to fully seat the module.
(e) After the module is fully seated, press down on the ejector tab to secure the module. The POTS modules are installed in slots 1 through 10 and 13 through 22 of the PSC.
Step 4 To install the DS3 STM in the subtending host MC, complete the following:
(a) Vertically align the module edge with the module guides at the top and bottom of slot 9 of the MC.
(b) Lift up on the ejector tab.
(c) As you lift up the ejector tab and gently apply pressure to the bottom of the faceplate, push the module into the slot.
(d) Push on the faceplate of each module to fully seat the module.
(e) After the module is fully seated, press down on the ejector tab to secure the module.
(f) Repeat Steps 4a through 4d for each subtending host MC.
Step 5 To install the SC module in the MC, complete the following:
(a) Inspect the SC module for damage.
(b) Vertically align the module edge with the module guides at the top and bottom of slot 12 of the MC.
(c) Lift up on the ejector tab.
(d) As you lift up the ejector tab and gently apply pressure to the bottom of the faceplate, push the module into the slot.
(e) Push on the faceplate of each module to fully seat the module.
(f) After the module is fully seated, press down on the ejector tab to secure the module. This causes each module in the MC to reset.
(g) After 2 minutes, the STATUS and ACTIVE LEDs on all modules should be solid green (where applicable). There should be no alarms on the SC module (ALARM LED off).
(h) If the status lights on the ATU-C modules or the NI module are flashing, perform a a software update using the ViewRunner software. Refer to the ViewRunner for Windows Provisioning and Operation Guide or the ViewRunner for HP OpenView Provisioning and Operation Guide for software upgrade procedures.
Although filler faceplates are not required for system operation, you must install them in all open slots of each chassis to achieve NEBS and thermal requirements. The filler faceplate installation is similar to the module installation.
To install the filler faceplates in the MC or PSC, complete the following steps:
Step 1 Vertically align the module edge with the module guides at the top and bottom of the slot.
Step 2 Lift up on the ejector tab.
Step 3 As you lift up the ejector tab and gently apply pressure to the bottom of the faceplate, push the module into the slot.
Step 4 Push on the faceplate of each module to fully seat the filler faceplate.
Step 5 Once the filler faceplate is fully seated, press down on the ejector tab to secure the faceplate.
For more information on NEBS requirements, refer to the Regulatory Compliance and Safety Information for the Cisco 6100 Series System document.
The NI module provides three types of network connections:
This section provides installation procedures and additional information for the OC-3c and DS3 network connections.
Use the following steps to connect the OC-3c NI module to the network using an OC-3c connection:
Step 1 Verify that the OC-3c NI module is in slot 10 on the MC.
Step 2 Remove the fiber that was temporarily installed to loop back the interface in the "Install the Modules" section.
Step 3 If you are using an OC-3c MMF NI module or an OC-3c SMF NI module, connect the OC-3c NI module transmit and receive cables from the ATM switch through the 1 RU of space between the fan tray and the PSC.
Step 4 Attach the optical fiber to the transmit and receive connectors in the inset on the front panel of the OC-3c NI modules. See Figure 6-11 for the OC-3c network interface connection location.
The transmit connector is the one closest to the top of the front panel and closer to the faceplate. The receive connector is closest to the bottom of the module and farthest from the faceplate. The connector IDs are silkscreened inside the inset.
Step 5 Allow enough slack in the cable so that the fan tray can be opened and the fans can be maintained. Coil the fiber loosely within the 1 RU of space to take out slack.
The reach for the SMF interface is specified as 35 km if you use Siecor 0.20 dB per kilometer, 9uM (micro meters) optical cable. Table 6-2 shows the electro-optical characteristics of the single-mode 155 MB ATM transceiver.
| Transmitter | Units | Minimum | Typical | Maximum |
|---|---|---|---|---|
Output power (average) | dBm | -15.0 | -11.0 | -8.0 |
Center wave length | nm | 1260 | --- | 1360 |
For single-mode ATM/SONET/SDH transceivers, the receiver minimum optical input power is -31 dBm (average), and the receiver maximum optical input power is -8 dBm (average).
Table 6-3 shows the electro-optical characteristics of the multi-mode OC-3c transceiver.
| Transmitter | Units | Minimum | Typical | Maximum |
|---|---|---|---|---|
Output power (average) | dBm | -17.0 | -15.0 | -12.0 |
Center wave length | nm | 800 | --- | 900 |
Use the following steps to connect the DS3 NI module to the network:
Step 1 Verify that the DS3 NI module is installed in slot 10 on the MC. This ensures that the DS3 NI module connections will be active.
The DS3 NI module connections are on the DS3 system I/O card that is located on the backplane of the MC. These connections attach to the ATM switch. Two 75-ohm DS3 BNC connectors are provided for DS3 transmit and receive. (See Figure 6-12.)
Step 2 Remove the short coaxial cable between the DS3 transmit and receive connectors to loop back the interface and prevent alarms when you install the SC module in the "Install the Modules" section.
Step 3 Attach a cable to the transmit (J3) DS3 BNC connector on the DS3 system I/O card on the MC backplane. See Figure 6-12 for the DS3 BNC connector locations on each version of the DS3 system I/O card.
Step 4 Cisco ships ferrites with this system that must be installed on the coaxial cables used to cable the DS3 system I/O card to the ATM switch. If you are using
Step 5 Attach the end of the cable used in Step 4, which originates at the transmit DS3 BNC connector, to the ATM switch.
Step 6 Attach a cable to the receive (J4) DS3 BNC connector on the DS3 system I/O card on the MC backplane. See Figure 6-12 for the DS3 BNC connector locations on each version of the DS3 system I/O card.
Step 7 Attach the ferrite as close as possible to the receive DS3 BNC connector on the DS3 system I/O card (see Figure 6-13 or Figure 6-14 for ferrite installation). Tie wrap the cable directly behind the ferrite.
Step 8 Attach the end of the cable used in Step 7, which originates at the receive DS3 BNC connector, to the ATM switch.
Step 9 Tie wrap the transmit and receive cables coming from the DS3 system I/O card to the location in which the cables meet after coming from the ferrites, and every 1 foot thereafter, for a total of 15 feet (see Figure 6-15).
The DS3 NI module receives its transmit timing from a local oscillator with 20 ppm accuracy. The line build-out defaults to 0 to 225 feet.
The default configuration for the DS3 NI module is as follows:
Table 6-4 shows reach comparisons for a Lucent 735A (thin coaxial cable), a Lucent 734A (thick coaxial cable), and a Belden RG-59/U (thick coaxial cable). An HP Cerjac was used to monitor the return loss. A minimum signal level of 360 mV was monitored at the HP Cerjac, and the cable length was then measured. The Lucent 734A thick coaxial cable performed slightly better than the Belden RG-59/U cable. The reach numbers represent the maximum distance to a DSX-3 cross connect.
| Cable Type | Line Build Out | Haul Length | Reach |
|---|---|---|---|
734A | 1 | Short haul | 325 feet |
RG-59/U | 1 | Short haul | 250 feet |
735A | 1 | Short haul | 175 feet |
Before closing the MC front door, ensure that
1. The DS3 subtending card on each subtending host MC and the DS3 system I/O card on each subtended node MC are cabled.
2. The DS3 STM is installed in each subtending host MC.
To achieve NEBS compliance, verify that the MC front door is attached to the MC and closed (see Figure 6-16). For more information on NEBS requirements, refer to the Regulatory Compliance and Safety Information for the Cisco 6100 Series System document.
Use the following steps to connect the PC running ViewRunner software:
Step 1 Connect one end of the Ethernet cable to the RJ-45 (10BaseT/LAN) connector on the DS3 system I/O card.
Step 2 Connect the other end of the Ethernet cable to one of the following
 | Tips For step-by-step instructions for provisioning a Direct Connect configuration, refer the ViewRunner for Windows Provisioning and Operation Guide or the ViewRunner for HP OpenView Provisioning and Operation Guide. |
You can order and install an optional rear door for the back of the MC. The rear door attaches to the back of the MC and restricts access to the backplane and cable connectors. To keep cables from interfering with the opening of the rear door, the cables that come down from the top of the rack can be tie wrapped to the door-mounting brackets.
The rear door accessory kit contains
Use the following steps to install the rear door:
Step 1 Locate and remove six of the backplane screws currently used to hold the MC backplane to the chassis. Three screws are located on the right of the chassis, and three are located on the left. See Figure 6-17 for the location of the screws. Keep the backplane screws. They will be used when you install the door-mounting brackets.
Step 2 Install the six standoff screws in the locations formerly occupied by the six screws you removed in Step 1. Use a one-quarter inch socket driver or wrench to tighten the standoff screws.
Step 3 Facing the rear of the chassis, install the door-mounting bracket on the right side of the chassis. Place the bracket over the standoff screws. Use three of the screws you removed in Step 1 to fasten the door-mounting bracket to the chassis. (See Figure 6-18.)
Step 4 Facing the rear of the chassis, install the door-mounting bracket (with the rear door attached) on the left side of the chassis. Place the bracket (with rear door) over the standoff screws. Use three of the screws you removed in Step 1 to fasten the door-mounting bracket (with rear door) to the chassis.
Step 5 Use the tie wraps provided in the accessory kit to attach cables to the door-mounting bracket loops, as necessary.
Step 6 The rear door closes left to right (seen from the rear of the chassis). There are two latches on the rear door (see Figure 6-19). Lift the latches as you close the rear door. After the rear door is in place, release the latches.
Step 7 The two thumbscrews located on the rear door align with two thumbscrew fasteners on the bracket (see Figure 6-20). Tighten the thumbscrews to secure the rear door.
To verify that the system is connected and running properly, follow the connection test procedures in "Connection Test Procedures for a Direct Connect Configuration."
Posted: Tue Nov 16 15:01:21 PST 1999
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