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This chapter provides instructions to install and power on the router. The chapter includes the following sections:
At each subscriber site, the router interfaces data and packet voice/fax traffic from the Hybrid Fiber Coax (HFC) and IP backbone network to locally attached devices. The router connects to:
The Cisco uBR924 also provides a backup POTS connection that enables a subscriber to dial out using the public telephone system if power in the building fails or the router encounters low power. Figure 3-1 identifies the rear-panel connectors.
 | Warning The device is designed to work with TN power systems. TN power systems have a protective earth. |
When installed and configured as a bridge using Cisco IOS Release 12.0(4)XI or higher interim build, three of the Ethernet hub ports at the rear of the Cisco uBR924 can be connected directly to three PCs at the subscriber site. Cisco IOS software treats all three Ethernet hub ports as one Ethernet interface.
When installed and configured as a bridge using Cisco IOS Release 12.(5)T or higher image, four of the Ethernet hub ports can be connected directly to four PCs at the subscriber site. Refer to Figure 3-2.
One of the four Ethernet hub ports can also be connected to a standard 10BaseT Ethernet hub which then connects additional computers at the site. Using Cisco IOS Release 12.0(5)T or higher images, a maximum of 254 devices can be bridged.
When installed and configured as a router, the Cisco uBR924 can be connected directly to four PCs via the Ethernet hub ports at the rear of the router. One of the four Ethernet hub ports can also be connected to a standard 10BaseT Ethernet hub which then connects additional computers or Ethernet devices at the site to a Local Area Network (LAN). Refer to Figure 3-3.
In routing mode, no maximum limitation exists. The Cisco uBR924 is configured to use the IP address of the headend router as the router's default IP gateway.
Table 3-1 presents a checklist, identifying the installation tasks to complete at each subscriber site:
| Checked Off | Task |
|---|---|
| Ensure the selected location to install the router is free of dust and meets the requirements stated in the "Site Environment Requirements" in the "Preparing for Installation" chapter. Follow safety guidelines in the "General Safety Recommendations" in the "Preparing for Installation" chapter, as well as those contained in this chapter. |
| Install the Cisco uBR924:
|
| Check the power at the subscriber site before and after installation to ensure that you are receiving clean power. Ensure proper grounding. |
| Verify that each PC to be connected to the router has an Ethernet NIC and that TCP/IP and DHCP are enabled. Ensure that all other PC pre-requisites are met. |
| Connect the router's F connector to the cable TV coaxial drop cable. |
| If the subscriber also subscribes to cable TV services, install a cable splitter/directional coupler as appropriate. |
| Connect the Cisco uBR924 to CPE devices:
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| Connect the router's Phone V1+V2 and V2 connectors (RJ-11 to RJ-11) to telephones or fax devices directly, or to adapter(s) that allow multiple telephones or fax devices to be connected to the two VoIP telephone line(s). At subscriber sites supporting multiple voice devices on a single VoIP telephone line, ensure you have all certified connector assemblies/adapters and wiring items needed to support the configuration. Note Cisco does not provide these items. Since the V1+V2 connector is a 4-wire port, with the second telco pair wired in parallel with V2, a two-line telephone can be plugged into the V1+V2 connector using a single cable if the cable has four wires. |
| Attach the 7-pin end of the power supply cord into the router's Power connector and connect the other end to the power supply. Plug the router's power supply into the wall outlet. Watch the router power on and initialize. |
| If applicable, connect the router's Line (RJ-11 to RJ-11) connector to a standard, analog POTS telephone line. Verify the telephone circuit/connection is working. |
| Power on all other devices at the subscriber site: PCs, Ethernet hub and all other equipment as applicable. |
| Ensure the data channel frequency has a sufficient RF signal level to meet your cable plant specifications and verify the RF input levels relative to a nearby analog video level:
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| Test the installation:
|
Place the router on a stable, flat surface such as a desktop, within close proximity to the cable TV drop connection and all devices to be connected at the subscriber site. The bottom, sides and rear of the router must remain unobstructed to ensure adequate airflow and to prevent the unit from overheating. The rubber feet on the bottom of the router provide enough clearance when the unit is placed on a flat, hard surface. Cisco recommends at least 3 inches of clearance at the rear of the router.
 | Caution Do not place the router on an uneven or soft surface. |
Install the router in compliance with national and local electrical codes such as:
| Warning This product relies on the building's installation for short-circuit (overcurrent) protection. Ensure that a fuse or circuit breaker no larger than 120 VAC, 15A U.S. (240 VAC, 10A International) is used on the phase conductors (all current-carrying conductors). |
The router uses one external AC-input power supply. The OK (power) LED on the front of the unit indicates that the power supply is supplying power to the unit when it is connected and operational.
The AC-input power supply uses a power factor corrector that allows the Cisco uBR924 cable access router to operate in any country where the input voltage is between 100 to 240 VAC, and 50 or 60 Hz. Different power cords are available to suit the country of operation.
| Warning The plug-socket combination must be accessible at all times because it serves as the main disconnecting device. |
Refer to Table 1-1 in the "Physical Specifications" section of Chapter 1 for AC-input power supply specifications, including input voltage and operating fequency ranges. Cisco recommends that you follow these precautions:
| Warning Do not work on the system or connect or disconnect cables during periods of lightning activity. |
To connect the Cisco uBR924 cable access router to the cable system and IP backbone:
Step 1 Locate the RF coaxial cable coming from the CATV wall outlet.
Step 2 Install a cable splitter/directional coupler as appropriate to separate TV and computer usage.
Step 3 Then connect the RF coaxial cable to the router's Cable TV In F connector. Hand tighten the connector, making sure it is finger tight; then give it a 1/6 turn.
| Warning Do not overtighten the connector. Overtightening can break off the connector. |
Step 4 Make sure all other coaxial cable connectors are securely tightened from the distribution tap to the Cisco uBR924, following instructions in step 3. This includes all intermediate splitters, couplers, or ground blocks.
| Caution To ensure compliance with FCC limits, connection to the cable system must be made with a high-quality, shielded cable. If the quality or general condition of the coaxial cable at the subscriber site is in question, Cisco recommends that you replace the coaxial cable. For more information on the effects of substandard cabling on the router installation, see the "Wiring and Cabling" section in Chapter 2. |
To connect the Cisco uBR924 cable access router to computers at the site:
Step 1 Locate all needed 10BaseT Ethernet cables:
Step 2 Connect one end of the Ethernet cable to one of the router's Ethernet ports (labeled 1X, 2X, 3X, or 4X) at the rear of the unit.
Step 3 Press the cable end firmly into the router's Ethernet receptacle and connect the other end to the computer or hub as applicable.
Step 4 Repeat steps 2 and 3 for each Ethernet connection from the Cisco uBR924 cable access router.
| Warning To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to the telephone-network voltage (TNV) circuits. LAN ports contain SELV circuits and WAN ports contain TNV circuits. Some LAN and WAN ports both use RJ-45 connectors. Use caution when connecting cables. |
To connect the Cisco uBR924 cable access router to telephone or fax devices at the site:
Step 1 Locate one RJ-11 to RJ-11 cable for each telephone or fax device to directly connect to the Cisco uBR924 cable access router if voice is supported. If multiple telephones or fax devices are to be connected to a VoIP telephone line, ensure the wiring is in place to support the configuration and assemble all needed items to support the site's configuration.
Step 2 Connect one end of the cable to one of the Phone ports (labeled V1+V2 and V2) at the rear of the router. Press the cable firmly into the receptacle.
Step 3 Connect the other end directly to the telephone or fax device as shown in Figure 3-6. For multiple telephones or fax devices, connect the other end to an adapter and ensure all telephones and fax devices are connected correctly on that VoIP telephone line.
| Caution A two-line telephone can be plugged into the V1+V2 rear connector of the Cisco uBR924, if the cable has four wires. Line 2 of such a telephone behaves as if a single-line telephone is plugged into the second voice port. If you are connecting multiple telephones or fax devices to a telephone line, be sure the sum of the RENs of all devices on any one line does not exceed five (5.0). If too many devices are attached, they may not ring properly. |
| Warning Equipment must be installed using an acceptable method of connection. Install adapters and/or connector assembly parts to support multiple voice devices per VoIP telephone line in compliance with regulations in your country. Incorrect connection of this or connected equipment to a general purpose outlet could result in a hazardous situation. |
Step 4 Repeat steps 2 and 3 to connect the device(s) to the second telephone line according to the configuration to support at the site.
| Warning Hazardous network voltages are presented in WAN ports regardless of whether power to the unit is OFF or ON. To avoid electric shock, use caution when working near WAN ports. When detaching cables, detach the end away from the unit first. This equipment contains a ring signal generator (ringer), which is a source of hazardous voltage. Do not touch the RJ-11 (phone) port wires (conductors), the conductors of a cable connected to the RJ-11 port, or the associated circuit board when the ringer is active. The ringer is activated by an incoming call. |
To connect AC-input power to the Cisco uBR924 cable access router:
Step 1 Locate the power receptacle at the rear of the router.
Step 2 Plug the 7-pin end of the power supply cord into the power connector at the rear of the router.
Step 3 Connect the AC power cord to the power supply.
Step 4 Plug the 3-prong end of the power cord into a standard electrical power outlet at the site. Power is immediately supplied to the router. The router is meant to be left on at all times, and therefore, has no power switch.
Step 5 Turn on power for all other equipment, and wait for the devices to complete their startup processes.
| Warning This product relies on the building's installation for short-circuit (overcurrent) protection. Ensure that a fuse or circuit breaker no larger than 120 VAC, 15A U.S. (240 VAC, 10A International) is used on the phase conductors (all current-carrying conductors). The plug-socket combination must be accessible at all times because it serves as the main disconnecting device. |
| Caution To turn off the router once it is operational, disconnect the 3-prong end of the power cord from the power outlet. To prevent electrical shock, do not disconnect the AC power cord from the power supply while the router is operating. |
| Warning Never defeat the ground conductor or operate the equipment in the absence of a suitably installed ground conductor. Contact the appropriate electrical inspection authority or an electrician if you are uncertain that suitable grounding is available. |
To connect the Cisco uBR924 cable access router to the backup, standard analog telephone line, follow instructions below.
| Warning To reduce the risk of fire, use only No. 26 AWG or larger telecommunication line cord. For Australia and New Zealand operation, this equipment is to be installed and maintained by service personnel only as defined by AS/NZS 3260 Clause 1.2.14.3 Service Personnel. |
Step 1 Locate the needed minimum 26 AWG RJ-11 to RJ-11 cable.
Step 2 Connect one end of the cable to the backup POTS line port (labeled Line) at the rear of the router. Press the cable firmly into the receptacle. When properly connected, the RJ-11 connector will be locked into the receptacle and can only be removed by pressing the plastic tab located on the connector while pulling the cable back from the receptacle.
Step 3 Connect the other end of the cable to the telephone wall jack.
If the Cisco uBR924 cable access router has a backup connection to the PSTN and the router loses power while VoIP calls are in progress, the subscriber can re-establish one of the two VoIP line connections---dialing out over the PSTN.
| Caution The backup POTS connection enables only one of the two VoIP lines connected to the Cisco uBR924 to function during a power outage. Calls in progress prior to the power outage will be disconnected. |
If power is re-established while a cutover call is in progress, the connection will remain in place until the call is terminated. When the call is terminated, the router automatically reboots.
When the Cisco uBR924 cable access router is connected and powered on, it executes automatic self-diagnostic and installation procedures. For this to occur, a number of tasks must be completed at the CMTS. Refer to Chapter 1 of this document for an understanding of the processes.
Various LEDs light and remain on as the router initializes, runs through its self-test and diagnostic routines, scans and locks on to a downstream frequency, obtains timing, signal, power level, authentication, addressing, and other operational parameters from the CMTS.
| LED Label | Description | Color | Function |
|---|---|---|---|
OK | System Status | Green | On = Cisco uBR924 power-on and self-test diagnostics have completed successfully, the system image has been booted, and the system is operational. Blink = After power-on and self-test diagnostics have completed successfully, LED blinks as the system image is booted. Off = No Power |
ACT | Cable Activity | Green | On = Cable Activity Off = No Activity |
1 | Ethernet 1 | Green | On = Link Up Blink = Activity Off = Link Down |
2 | Ethernet 2 | Green | On = Link Up Blink = Activity Off = Link Down |
3 | Ethernet 3 | Green | On = Link Up Blink = Activity Off = Link Down |
4 | Ethernet 4 | Green | On = Link Up Blink = Activity Off = Link Down |
MSG | Message |
| Reserved |
V OK | Voice System Status | Green | On = Healthy VoIP system Off = VoIP system problem; cable access router may have switched over to the backup PSTN line |
V1 | Voice Port 1 | Green | On = Call in progress Off = No call |
V2 | Voice Port 2 | Green | On = Call in progress Off = No call |
LINK | Cable RF Link | Green | On = Cable connection up; RF link up Blink = cable access router searching for a downstream frequency Off = Cable connection down; RF link down |
DS* | Downstream Signal Lock Status | Green | On = Cisco uBR924 is locked to a downstream frequency (channel). Off = Cisco uBR924 is not locked to a downstream frequency (channel) or the router has not yet located a digital signal. |
US* | Upstream Signal Quality | Green | On = Cisco uBR924 has established upstream communications with the CMTS; cable access router has completed ranging state 2 (as per DOCSIS), has entered provisioning state, and is communicating within 6 dB of desired final power level (generally within 3 dB). Off = Cisco uBR924 has not completed secondary ranging; the CMTS has heard from the cable access router, however, and there is some upstream continuity. |
DSNR* | Downstream Signal-to-Noise Ratio | Green | On = Receiving quality, downstream signal; SNR is greater than 5 dB above the downstream lock threshold. Off = Receiving low downstream signal strength or quality |
*
These are the Cisco factory-default LED settings. Configuration control messages can be sent to the Cisco uBR924 cable access router through Simple Network Management (SNMP) set requests. Using Management Information Base (MIB) objects in the Cisco cable device MIB, the CMTS system administrator can define these LEDs to have other meanings.
While the Cisco uBR924 cable access router initializes:
Step 1 Watch the LEDs on the front of the router. When the router first powers on, all LEDs (except for the 4 Ethernet LEDs and the ACT LED) briefly light and then turn off. As self-test is executed, various LEDs light to reveal diagnostic progress and turn off when self-test is complete.
Step 2 The OK LED then blinks as the router completes self-test and boots a Cisco IOS image. Once finished, the OK LED lights again.
Step 3 When the router initialization and configuration download is complete (a few minutes), the green OK LED remains on.
Step 4 The DS, US, DSNR and LINK LEDs remain on to indicate the router is operational and receiving a healthy signal:
Step 5 Test the router to be sure it is functioning. Proceed to the "Verifying Installation" section. The ACT LED blinks to indicate activity on the RF link. The Ethernet 1, 2, 3, 4 LEDs blink to indicate activity from the PC. The V1 and V2 LEDs light to indicate the voice ports are active.
Step 6 After verifying operations, acquaint the subscriber with the router recommended ambient temperature requirement of 23° to 113° F (-5° to 45° C). Remind the subscriber to keep the area around the router as free from dust as is practical and review general safety standards.
Step 7 Leave behind the Cisco-provided subscriber publications, along with any literature your company provides to contact your customer service department.
To verify installation, follow procedures in the remainder of this chapter. Should you be unable to complete any procedure, reference Chapter 4.
To verify Internet connectivity:
Step 1 From a PC connected to the Cisco uBR924, start the Internet browser program installed on the PC.
Step 2 In the appropriate area of the web browser screen, enter a URL of your choice:
Step 3 Watch the appropriate Ethernet LED on the front of the router blink as data is transmitted on the link.
Step 4 Repeat steps 1 through 3 for each PC connected to the Cisco uBR924.
Step 5 Now, disconnect the CATV cable input by unscrewing the cable connector at the back of the router.
Step 6 Using an in-line attenuator, add 3 to 6 dB of attenuation between the
router and the CATV cable input.
Step 7 Reconnect the CATV cable to the router and check the network connection at the computer. Reload the previous web page or try to access another URL. Verify that you can still successfully access the Internet.
Step 8 Disconnect the CATV cable input again by unscrewing the cable connector at the back of the router.
Step 9 Remove the in-line attenuator from the back of the router.
Step 10 Reconnect the CATV cable to the router and recheck the network connection at the computer.
To make a telephone call over the HFC and IP backbone network:
Step 1 Pick up a telephone connected to one of the Cisco uBR924's VoIP (V1+V2 or V2) rear ports. This signals an off-hook condition. The session application issues a dial tone and waits for a telephone number to be dialed.
If you do not have dial tone, the Cisco uBR924 voice ports may be not enabled. Refer to the "VoIP Subsystem" section of Chapter 4.
Step 2 Dial a number. The QoS reservations are put in place to achieve the desired QoS over the cable system and IP network. The voice CODECs appropriate to the protocol used to transmit packetized voice are turned on for both ends and the call proceeds.
The V1 or V2 front-panel LED (as applicable depending on which port the telephone is connected to) lights to denote a call is in progress and remains on until the call is disconnected.
Any call-progress indications and other signals that can be carried in-band (for example, remote phone ringing) are cut through the voice path as soon as an end-to-end audio channel is up. You hear ringing until the caller picks up or receive a busy.
Step 3 When either end hangs up, the bandwidth and call parameters are torn down. The session ends, with each end going idle, waiting for another off-hook condition.
To send a fax over the HFC and IP backbone network:
Step 1 Place a document in the fax machine's document feeder, according to instructions for the fax device.
Step 2 Enter a destination number to receive the fax and press Dial or Start on most fax machines. The QoS reservations are put in place to achieve the desired QoS over the cable system and IP network. The CODECs appropriate to fax (and the protocol used to transmit packetized voice) are turned on for both ends and the fax proceeds.
The V1 or V2 LED (as applicable depending on which port the fax machine is connected to) lights to denote a fax is in progress and remains on until the fax call is disconnected.
Any call-progress indications and other signals that can be carried in-band (for example, remote phone ringing) are cut through the voice path as soon as an end-to-end audio channel is up. You hear ringing (depending on the fax machine setup) until the receiving fax picks up or you receive a busy indication.
Step 3 Listen for the fax tone on the other end and verify the fax is transmitted.When either end hangs up, the bandwidth and call parameters are torn down. The session ends, with each end going idle, waiting for another off-hook condition.
Step 4 Verify completion of the fax transmission at the destination.
To verify the backup PSTN line is operational:
Step 1 Simulate a power failure in the Cisco uBR924; disconnect the 3-prong end of the power cord from the power outlet, following all safety instructions in the "Connecting Power" section of this chapter.
Step 2 Dial out over the backup PSTN line and wait for a connection to be established.
Step 3 Once a cutover call is in place, connect the 3-prong end of the power cord to the power outlet. Power is immediately supplied to the Cisco uBR924.
Step 4 Verify the cutover call remains connected.
Step 5 Disconnect the call. The Cisco uBR924 automatically reboots.
Posted: Thu Sep 16 17:46:29 PDT 1999
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