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... View VCC OK SYSTEM FDX LINK 100Mbps FDX LINK 1 100Mbps 0 121093 1 2 3 4 1 Network module slot 2 2 Network module slot 4 3 Network module slot 6 Figure 1-6 Chassis Slot Locations in Cisco 2851 Routers 42 31 S A= ACT A= FDX L O S L S= SPEED A= LINK T O A GE 0/1 GE 0/0 3 A T 2 F F S SS L S L LO L T O 1 T PVDM2 PVDM1 PVDM0 AIM1 AIM0 0 5 6 4 Network module slot 1 5 Network module slot 3 6 Network module slot...
... View VCC OK SYSTEM FDX LINK 100Mbps FDX LINK 1 100Mbps 0 121093 1 2 3 4 1 Network module slot 2 2 Network module slot 4 3 Network module slot 6 Figure 1-6 Chassis Slot Locations in Cisco 2851 Routers 42 31 S A= ACT A= FDX L O S L S= SPEED A= LINK T O A GE 0/1 GE 0/0 3 A T 2 F F S SS L S L LO L T O 1 T PVDM2 PVDM1 PVDM0 AIM1 AIM0 0 5 6 4 Network module slot 1 5 Network module slot 3 6 Network module slot...
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...However, interface card functionality is limited to allow installation of Cisco Network Modules for Cisco Access Routers Cisco Interface Cards Supported on Cisco Network Modules Cisco Interface Cards Supported on 1- or 2-Slot Network Modules" section...ACT LNK AUI EN ETHERNET 0 H8603 1 Interface card slot 1 2 Interface card slot 0 For information on installing interface cards onto network modules, see the "Installing Cisco Interface Cards in 1- These network modules have interface card slots to either voice or data interface cards. See Table 1-2 for sample 1- OL-2485-20 Cisco...
...However, interface card functionality is limited to allow installation of Cisco Network Modules for Cisco Access Routers Cisco Interface Cards Supported on Cisco Network Modules Cisco Interface Cards Supported on 1- or 2-Slot Network Modules" section...ACT LNK AUI EN ETHERNET 0 H8603 1 Interface card slot 1 2 Interface card slot 0 For information on installing interface cards onto network modules, see the "Installing Cisco Interface Cards in 1- These network modules have interface card slots to either voice or data interface cards. See Table 1-2 for sample 1- OL-2485-20 Cisco...
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...reinstate power by moving the handle of the router. Statement 8 Installing Double-Wide and Extended Double-Wide Network Modules in Cisco Access Routers Network modules can be installed either before or after mounting the router, whichever is more convenient. Using a ...captive mounting screws on the router backplane. Installing Cisco Network Modules in Cisco Access Routers Chapter 2 Installing Cisco Network Modules in Cisco Access Routers Figure 2-10 Installing Single-Wide and Extended Single-Wide Network Modules in Cisco Access Routers ACT H9998 ETHERNET 0 WO SERIAL ASYNC 15 11 ...
...reinstate power by moving the handle of the router. Statement 8 Installing Double-Wide and Extended Double-Wide Network Modules in Cisco Access Routers Network modules can be installed either before or after mounting the router, whichever is more convenient. Using a ...captive mounting screws on the router backplane. Installing Cisco Network Modules in Cisco Access Routers Chapter 2 Installing Cisco Network Modules in Cisco Access Routers Figure 2-10 Installing Single-Wide and Extended Single-Wide Network Modules in Cisco Access Routers ACT H9998 ETHERNET 0 WO SERIAL ASYNC 15 11 ...
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...ground, do not remove the wire from Cisco Access Routers WO SERIAL ASYNC 15 11 14 10 13 9 12 8 15 11 14 10 13 9 12 8 ASYNC 24-31 ASYNC 8-15 7 3 6 2 5 1 4 0 7 3 6 2 5 1 4 0 ASYNC 16-23 ASYNC 0-7 EN ACT 121074 2 1 1 Router chassis 2 ...Single-wide network module OL-2485-20 Cisco Network Modules Hardware Installation Guide 2-19 Do not touch the circuit board. Figure 2-14 Removing Single-Wide and Extended Single...
...ground, do not remove the wire from Cisco Access Routers WO SERIAL ASYNC 15 11 14 10 13 9 12 8 15 11 14 10 13 9 12 8 ASYNC 24-31 ASYNC 8-15 7 3 6 2 5 1 4 0 7 3 6 2 5 1 4 0 ASYNC 16-23 ASYNC 0-7 EN ACT 121074 2 1 1 Router chassis 2 ...Single-wide network module OL-2485-20 Cisco Network Modules Hardware Installation Guide 2-19 Do not touch the circuit board. Figure 2-14 Removing Single-Wide and Extended Single...
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...voice interface card into a network module slot. Chapter 2 Installing Cisco Network Modules in Cisco Access Routers Installing Cisco Interface Cards in a Network Module (Typical) H7219 2E 2W W1 B1 B2 BRI S/T 1 ETH 1 1 Interface card ACT LNK ACT LNK WO ETHERNET 0 AUI EN 2 2 2-slot network module ...OL-2485-20 Cisco Network Modules Hardware Installation Guide 2-25 Step 4 Align the interface card with network cables, label ...
...voice interface card into a network module slot. Chapter 2 Installing Cisco Network Modules in Cisco Access Routers Installing Cisco Interface Cards in a Network Module (Typical) H7219 2E 2W W1 B1 B2 BRI S/T 1 ETH 1 1 Interface card ACT LNK ACT LNK WO ETHERNET 0 AUI EN 2 2 2-slot network module ...OL-2485-20 Cisco Network Modules Hardware Installation Guide 2-25 Step 4 Align the interface card with network cables, label ...
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... your router supports a specific network module, see Figure 3-2) Figure 3-1 1-Port Ethernet Network Module ETHERNET 1E ETH 0 LINK EN ACT 10BASE-T AUI port port H9251 OL-2485-20 Cisco Network Modules Hardware Installation Guide 3-1 It contains the following network modules provide Ethernet interfaces: • 1-port Ethernet network module (NM...P T E R 3 Connecting Ethernet, Fast Ethernet, and Token Ring Network Modules This chapter describes how to connect Ethernet, Fast Ethernet, and Token Ring network modules for Cisco access routers. and 4-port Ethernet modules, and on 1-
... your router supports a specific network module, see Figure 3-2) Figure 3-1 1-Port Ethernet Network Module ETHERNET 1E ETH 0 LINK EN ACT 10BASE-T AUI port port H9251 OL-2485-20 Cisco Network Modules Hardware Installation Guide 3-1 It contains the following network modules provide Ethernet interfaces: • 1-port Ethernet network module (NM...P T E R 3 Connecting Ethernet, Fast Ethernet, and Token Ring Network Modules This chapter describes how to connect Ethernet, Fast Ethernet, and Token Ring network modules for Cisco access routers. and 4-port Ethernet modules, and on 1-
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...Fast Ethernet, and Token Ring Network Modules Figure 3-2 4-Port Ethernet Network Module ETHERNET 4E ETH 3 ETH 2 ETH 1 ETH 0 321 0 LINK EN ACT 10BASE-T AUI port port H9252 Ethernet 2-WAN Card Slot Modules The following 2-slot network modules provide one or two Ethernet interfaces, plus two slots for... network module (NM-1E1R2W) (see Figure 3-5) Figure 3-3 1-Ethernet 2-WAN Card Slot Network Module 1E 2W W1 10BASE-T AUI WO port port ACT LNK H7215 AUI EN ETHERNET 0 LEDs Enable LED Figure 3-4 2-Ethernet 2-WAN Card Slot Network Module 2E 2W W1 LEDs 10BASE-T WO port AUI...
...Fast Ethernet, and Token Ring Network Modules Figure 3-2 4-Port Ethernet Network Module ETHERNET 4E ETH 3 ETH 2 ETH 1 ETH 0 321 0 LINK EN ACT 10BASE-T AUI port port H9252 Ethernet 2-WAN Card Slot Modules The following 2-slot network modules provide one or two Ethernet interfaces, plus two slots for... network module (NM-1E1R2W) (see Figure 3-5) Figure 3-3 1-Ethernet 2-WAN Card Slot Network Module 1E 2W W1 10BASE-T AUI WO port port ACT LNK H7215 AUI EN ETHERNET 0 LEDs Enable LED Figure 3-4 2-Ethernet 2-WAN Card Slot Network Module 2E 2W W1 LEDs 10BASE-T WO port AUI...
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...next to it directly to an Ethernet transceiver. All modules detect the type of these connectors can connect it . OL-2485-20 Cisco Network Modules Hardware Installation Guide 3-3 Chapter 3 Connecting Ethernet, Fast Ethernet, and Token Ring Network Modules Ethernet Network Modules 16MBPS IN-RING... ACT LNK H6555 Figure 3-5 1-Ethernet 1-Token Ring 2-WAN Card Slot Network Module 1E 1R W1 Token Ring interface LEDs 10BASE-T WO ...
...next to it directly to an Ethernet transceiver. All modules detect the type of these connectors can connect it . OL-2485-20 Cisco Network Modules Hardware Installation Guide 3-3 Chapter 3 Connecting Ethernet, Fast Ethernet, and Token Ring Network Modules Ethernet Network Modules 16MBPS IN-RING... ACT LNK H6555 Figure 3-5 1-Ethernet 1-Token Ring 2-WAN Card Slot Network Module 1E 1R W1 Token Ring interface LEDs 10BASE-T WO ...
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... Ring Network Modules Figure 3-6 Connecting an Ethernet AUI Port to a Transceiver ETHERNET 4E ETH 3 ETH 2 ETH 1 321 0 LINK ETH 0 ACT EN Ethernet AUI port (DB-15) (with jackscrews or slide-latch) Ethernet AUI cable (not supplied) BNC connector Ethernet transceiver To thin Ethernet ... device. Figure 3-7 Connecting an Ethernet 10BASE-T Port to a Hub ETHERNET 4E ETH 3 ETH 2 ETH 1 321 0 ETH 0 LINK ACT EN Ethernet 10BASE-T port (RJ-45) H9256 10BASE-T cable 10BASE-T hub Cisco Network Modules Hardware Installation Guide 3-4 OL-2485-20 These ports are color-coded yellow.
... Ring Network Modules Figure 3-6 Connecting an Ethernet AUI Port to a Transceiver ETHERNET 4E ETH 3 ETH 2 ETH 1 321 0 LINK ETH 0 ACT EN Ethernet AUI port (DB-15) (with jackscrews or slide-latch) Ethernet AUI cable (not supplied) BNC connector Ethernet transceiver To thin Ethernet ... device. Figure 3-7 Connecting an Ethernet 10BASE-T Port to a Hub ETHERNET 4E ETH 3 ETH 2 ETH 1 321 0 ETH 0 LINK ACT EN Ethernet 10BASE-T port (RJ-45) H9256 10BASE-T cable 10BASE-T hub Cisco Network Modules Hardware Installation Guide 3-4 OL-2485-20 These ports are color-coded yellow.
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...10BASE-T only). Figure 3-8 Ethernet Network Module LEDs (Typical) ETHERNET 4E ETH 3 ETH 2 ETH 1 ETH 0 321 0 LINK EN ACT H9254 LEDs Enable LED Fast Ethernet Network Modules Fast Ethernet connections are provided on 1-port Fast Ethernet modules, and on 1-port Fast Ethernet...PRI modules described in Chapter 4, "Connecting Fast Ethernet-PRI Network Modules," also provide a Fast Ethernet interface. OL-2485-20 Cisco Network Modules Hardware Installation Guide 3-5 Chapter 3 Connecting Ethernet, Fast Ethernet, and Token Ring Network Modules Fast Ethernet Network Modules Ethernet...
...10BASE-T only). Figure 3-8 Ethernet Network Module LEDs (Typical) ETHERNET 4E ETH 3 ETH 2 ETH 1 ETH 0 321 0 LINK EN ACT H9254 LEDs Enable LED Fast Ethernet Network Modules Fast Ethernet connections are provided on 1-port Fast Ethernet modules, and on 1-port Fast Ethernet...PRI modules described in Chapter 4, "Connecting Fast Ethernet-PRI Network Modules," also provide a Fast Ethernet interface. OL-2485-20 Cisco Network Modules Hardware Installation Guide 3-5 Chapter 3 Connecting Ethernet, Fast Ethernet, and Token Ring Network Modules Fast Ethernet Network Modules Ethernet...
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...Network Modules H2214 Figure 3-16 Simplex SC Connector H2399 H10832 Figure 3-17 Connecting a Fast Ethernet FX Port to a Repeater or Hub (Duplex Connector) ACT ETHERNET 0 WO SERIAL FAST ETHERNET 1FE-FX To repeater or hub C0L LINK 100 MBPS FULL DPLX 100 b FX EN SC-type connector Fast ...Ethernet module Router Figure 3-18 Connecting a Fast Ethernet FX Port to a Repeater or Hub (Simplex Connectors) H10843 ACT C0L LINK 100 MBPS FULL DPLX ETHERNET 0 WO SERIAL FAST ETHERNET 1FE-FX 100 b FX EN To repeater or hub SC-type connectors Fast Ethernet...
...Network Modules H2214 Figure 3-16 Simplex SC Connector H2399 H10832 Figure 3-17 Connecting a Fast Ethernet FX Port to a Repeater or Hub (Duplex Connector) ACT ETHERNET 0 WO SERIAL FAST ETHERNET 1FE-FX To repeater or hub C0L LINK 100 MBPS FULL DPLX 100 b FX EN SC-type connector Fast ...Ethernet module Router Figure 3-18 Connecting a Fast Ethernet FX Port to a Repeater or Hub (Simplex Connectors) H10843 ACT C0L LINK 100 MBPS FULL DPLX ETHERNET 0 WO SERIAL FAST ETHERNET 1FE-FX 100 b FX EN To repeater or hub SC-type connectors Fast Ethernet...
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...the UTP connector on the network module (see Figure 3-23). The network module automatically detects which connector is in use. OL-2485-20 Cisco Network Modules Hardware Installation Guide 3-11 To connect the module to a Token Ring network, attach one end of the cable to the DB-9...Token Ring media attachment unit (MAU). Chapter 3 Connecting Ethernet, Fast Ethernet, and Token Ring Network Modules Token Ring Network Modules 16MBPS IN-RING ACT LNK H6555 Figure 3-20 1-Ethernet 1-Token Ring 2-WAN Card Slot Network Module 1E 1R W1 Token Ring interface LEDs 10BASE-T WO port AUI...
...the UTP connector on the network module (see Figure 3-23). The network module automatically detects which connector is in use. OL-2485-20 Cisco Network Modules Hardware Installation Guide 3-11 To connect the module to a Token Ring network, attach one end of the cable to the DB-9...Token Ring media attachment unit (MAU). Chapter 3 Connecting Ethernet, Fast Ethernet, and Token Ring Network Modules Token Ring Network Modules 16MBPS IN-RING ACT LNK H6555 Figure 3-20 1-Ethernet 1-Token Ring 2-WAN Card Slot Network Module 1E 1R W1 Token Ring interface LEDs 10BASE-T WO port AUI...
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OL-2485-20 Cisco Network Modules Hardware Installation Guide 9-1 In addition to the digital modem module, the router must contain a PRI ... 12-, 18-, 24-, and 30-port digital modem network modules (NM-6DM, NM-12DM, NM-18DM, NM-24DM, and NM-30DM) for Cisco modular routers and contains the following sections: • Digital Network Modem Network Modules Overview, page 9-1 • Adding 6-Port MICA Modules to a...calls. Digital Network Modem Network Modules Overview These modules (see Table 1-6 on page 1-16. The digital modem module acts as Ethernet, to provide connectivity to the LAN.
OL-2485-20 Cisco Network Modules Hardware Installation Guide 9-1 In addition to the digital modem module, the router must contain a PRI ... 12-, 18-, 24-, and 30-port digital modem network modules (NM-6DM, NM-12DM, NM-18DM, NM-24DM, and NM-30DM) for Cisco modular routers and contains the following sections: • Digital Network Modem Network Modules Overview, page 9-1 • Adding 6-Port MICA Modules to a...calls. Digital Network Modem Network Modules Overview These modules (see Table 1-6 on page 1-16. The digital modem module acts as Ethernet, to provide connectivity to the LAN.
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... power and disconnect network cables before you until it from a Router cT1 PRI 3 ETHERNET 4E 1 CTRLR 0 ETH 3 ETH 2 ETH 1 321 0 LINK ACT DIGITAL MODEMS EN ETH 0 MICA 2E 2W W1 BANK 0 MICA BANK 1 STP EN ETHERNET 1 MICA BANK 2 MICA BANK 3 MICA BANK 4 EN ETHERNET ...0 2 SERIAL AUI EN INPUT 100-240VAC 50/60HZ 3.0-1.5 AMPS REMOTE ALARM LOCAL ALARM LOOPBACK CARRIER DETECT ACT LNK ACT ACT LNK ACT H11202 OL-2485-20 Cisco Network Modules Hardware Installation Guide 9-5 Figure 9-3 Removing a Digital Modem Network Module from the chassis slot. To ensure that ...
... power and disconnect network cables before you until it from a Router cT1 PRI 3 ETHERNET 4E 1 CTRLR 0 ETH 3 ETH 2 ETH 1 321 0 LINK ACT DIGITAL MODEMS EN ETH 0 MICA 2E 2W W1 BANK 0 MICA BANK 1 STP EN ETHERNET 1 MICA BANK 2 MICA BANK 3 MICA BANK 4 EN ETHERNET ...0 2 SERIAL AUI EN INPUT 100-240VAC 50/60HZ 3.0-1.5 AMPS REMOTE ALARM LOCAL ALARM LOOPBACK CARRIER DETECT ACT LNK ACT ACT LNK ACT H11202 OL-2485-20 Cisco Network Modules Hardware Installation Guide 9-5 Figure 9-3 Removing a Digital Modem Network Module from the chassis slot. To ensure that ...
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...HSSI Network Module LEDs HIGH SPEED SERIAL 1HSSI HSSI 0 EN LB/CN RC RD TC TD 11712 HSSI port LEDs Enable LED OL-2485-20 Cisco Network Modules Hardware Installation Guide 13-3 Chapter 13 Connecting HSSI Network Modules Figure 13-3 Connecting Two Routers Back to the router. The enable LED ... HSSI Network Module LEDs HSSI 0 EN HSSI port 3 2E 2W W1 B1 B2 SEE MANUAL BEFORE INSTALLATION BRI NT1 NT1 ACT LNK ACT LNK 1 ETHERNET 1 ETHERNET 0 HSSI network module ACT WO SERIAL FAST ETHERNET 1FE AUI EN 10/100 bTX COL LINK 100 MBPS FULL DPLX 2 Router EN INPUT 100-240VAC ...
...HSSI Network Module LEDs HIGH SPEED SERIAL 1HSSI HSSI 0 EN LB/CN RC RD TC TD 11712 HSSI port LEDs Enable LED OL-2485-20 Cisco Network Modules Hardware Installation Guide 13-3 Chapter 13 Connecting HSSI Network Modules Figure 13-3 Connecting Two Routers Back to the router. The enable LED ... HSSI Network Module LEDs HSSI 0 EN HSSI port 3 2E 2W W1 B1 B2 SEE MANUAL BEFORE INSTALLATION BRI NT1 NT1 ACT LNK ACT LNK 1 ETHERNET 1 ETHERNET 0 HSSI network module ACT WO SERIAL FAST ETHERNET 1FE AUI EN 10/100 bTX COL LINK 100 MBPS FULL DPLX 2 Router EN INPUT 100-240VAC ...
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...High-Density Analog Telephony Network Module to a Main Distribution Frame NM- HDA Port # Type 14 4 FXS 5- 14 26 1524 1 50 ACT EN 25 62292 Connecting the High-Density Analog Telephony Network Module to the Network The high-density analog telephony network module is connected to a distribution...be used if more than eight ports using high-complexity codecs are needed on the network module. (See Figure 16-3.) OL-2485-20 Cisco Network Modules Hardware Installation Guide 16-3 To install DSP expansion modules, follow these steps: Step 1 Insert the connector on the DSP expansion...
...High-Density Analog Telephony Network Module to a Main Distribution Frame NM- HDA Port # Type 14 4 FXS 5- 14 26 1524 1 50 ACT EN 25 62292 Connecting the High-Density Analog Telephony Network Module to the Network The high-density analog telephony network module is connected to a distribution...be used if more than eight ports using high-complexity codecs are needed on the network module. (See Figure 16-3.) OL-2485-20 Cisco Network Modules Hardware Installation Guide 16-3 To install DSP expansion modules, follow these steps: Step 1 Insert the connector on the DSP expansion...
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...telephony network module. Figure 16-3 Installing a DSP Expansion Module 62294 NHMDA- Port 14 154- # 4 Type FXS 1254- 26 1 50 25 ACT EN Adding Port Expansion Modules Port expansion modules can be used to correctly align the expansion module. If the pin does not properly align with... board seats onto the connector. Insert the connector on the port expansion module into the router, as described in the "Installing Cisco Network Modules in Cisco Access Routers" section on the network module, as shown in Figure 16-4. Install the network module into the module connector on page...
...telephony network module. Figure 16-3 Installing a DSP Expansion Module 62294 NHMDA- Port 14 154- # 4 Type FXS 1254- 26 1 50 25 ACT EN Adding Port Expansion Modules Port expansion modules can be used to correctly align the expansion module. If the pin does not properly align with... board seats onto the connector. Insert the connector on the port expansion module into the router, as described in the "Installing Cisco Network Modules in Cisco Access Routers" section on the network module, as shown in Figure 16-4. Install the network module into the module connector on page...
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...screws from the hardware kit through the port expansion module into the router, as shown in (67.8 N-cm) of torque. OL-2485-20 Cisco Network Modules Hardware Installation Guide 16-5 Statement 347 Figure 16-4 Installing a Port Expansion Module EM 0 installed on the network module. Install the network... Modules in Cisco Access Routers" section on the front of FXO ports, failure to properly tighten both mounting screws causes FXO ground-start outgoing call operation to the base module with 6-8 lbs-in Figure 16-5. Port 14154- # 4 Type FXS 1254- 26 1 50 25 ACT EN EM 1 ...
...screws from the hardware kit through the port expansion module into the router, as shown in (67.8 N-cm) of torque. OL-2485-20 Cisco Network Modules Hardware Installation Guide 16-5 Statement 347 Figure 16-4 Installing a Port Expansion Module EM 0 installed on the network module. Install the network... Modules in Cisco Access Routers" section on the front of FXO ports, failure to properly tighten both mounting screws causes FXO ground-start outgoing call operation to the base module with 6-8 lbs-in Figure 16-5. Port 14154- # 4 Type FXS 1254- 26 1 50 25 ACT EN EM 1 ...
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... boot process is available to process data. HDA Port # Type 14 4 FXS 5- 14 26 1524 1 50 ACT EN 25 Active LED Enable LED 62296 Table 16-3 High-Density Analog Telephony Network Module LEDs LED EN ACT Meaning Green indicates that the module is ready to the router. Table 16-4 lists the pinouts... Network Modules Figure 16-5 Label Locations for Expansion Ports Apply label for EM0 here NM- It goes on the type of expansion cards installed. 16-6 Cisco Network Modules Hardware Installation Guide OL-2485-20
... boot process is available to process data. HDA Port # Type 14 4 FXS 5- 14 26 1524 1 50 ACT EN 25 Active LED Enable LED 62296 Table 16-3 High-Density Analog Telephony Network Module LEDs LED EN ACT Meaning Green indicates that the module is ready to the router. Table 16-4 lists the pinouts... Network Modules Figure 16-5 Label Locations for Expansion Ports Apply label for EM0 here NM- It goes on the type of expansion cards installed. 16-6 Cisco Network Modules Hardware Installation Guide OL-2485-20
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...; In Figure 18-10, the cable in link B is partitioned into two separate stacks. Stacking the Cisco EtherSwitch Service Modules Chapter 18 Connecting Cisco EtherSwitch Service Modules Figure 18-8 Switch Stack with Full Bandwidth Connections A= ACT A= FDX S= SPEED A= LINK A FE 0/1 FE 0/0 A F F S S L L PVDM2... MODE SYST MASTR STAT DUPLX SPEED STACK LINE PWR EN A B 121915 C Figure 18-9 shows a stack of Cisco EtherSwitch service modules and Catalyst 3750 switches with failover conditions. therefore, this stack provides only half bandwidth and does not have redundant...
...; In Figure 18-10, the cable in link B is partitioned into two separate stacks. Stacking the Cisco EtherSwitch Service Modules Chapter 18 Connecting Cisco EtherSwitch Service Modules Figure 18-8 Switch Stack with Full Bandwidth Connections A= ACT A= FDX S= SPEED A= LINK A FE 0/1 FE 0/0 A F F S S L L PVDM2... MODE SYST MASTR STAT DUPLX SPEED STACK LINE PWR EN A B 121915 C Figure 18-9 shows a stack of Cisco EtherSwitch service modules and Catalyst 3750 switches with failover conditions. therefore, this stack provides only half bandwidth and does not have redundant...