• The GNSS module requires an active GPS/GNSS antenna with built-in Low-Noise Amplifier (LNA) for optimal performance. The antenna LNA amplifies the received satellite signals for two purposes:
  • Compensation of losses on the cable
  • Lifting the signal amplitude in the suitable range for the receiver frontend

The Amplification required is 22dB gain + cable/connector loss + Splitter signal loss.

The recommended range of LNA gain (LNA gain minus all cable and connector losses) at the connector of the receiver module is 22dB to 30dB with a minimum of 20dB and a maximum of 35dB.

• GNSS module provides 5V to the active antenna through the same RF input.
• Surge requirement:

GNSS modules have built-in ESD protections on all pins, including the RF-input pin. However, additional surge protection may be required if rooftop antennas are being connected, to meet the regulations and standards for lightning protection in the countries where the end-product is installed.

A lightning protection must be mounted at the place where the antenna cable enters the building. The primary lightning protection must be capable of conducting all potentially dangerous electrical energy to PE (Protective Earth).

Surge arrestors should support DC-pass and suitable for the GPS frequency range (1.575GHz) with low attenuation.

• Antenna Sky visibility:

GPS signals can only be received on a direct line of sight between antenna and satellite. The antenna should see as much as possible from the total sky. For proper timing, minimum of four satellites should be locked.

Note	The antenna terminal should be earthed at the building entrance in accordance with the ANSI/NFPA 70, the National Electrical Code (NEC), in particular Section 820.93, Grounding of Outer Conductive Shield of a Coaxial Cable.

Three power supplies can be plugged in the NCS 4216 chassis that works in the 2+1 redundancy mode. For the normal operation of the chassis, at least two power supplies should be powered on. When all the three power supplies are plugged in, they work in a current sharing mode.

Each power supply has dual feed. It is recommended to connect each power feed to a separate input source.

The Cisco NCS 4216 DC power supply does not support the Dying Gasp feature.

LEDs are also provided on each power supply to indicate the status of the input power and the health of the power supply. For more information about the LEDs on the Cisco NCS 4216, see Troubleshooting section.

The DC Power Supply Specifications table summarizes the input power specifications for the Cisco NCS 4216 DC power supply units.

The A907-FAN-E has:

• Four dual rotor fans—for the PSU area cooling

• 12 fans (three columns for four fans)—60x60x38mm fans for the RSP and interface modules

This fan tray has redundant fans and provides side-to-side forced air cooling. A907-FAN-E is a field replaceable unit (FRU).

The following table describes the fan speed when used with the NCS4216-RSP route processor.

Note	The system considers the temperature of the fan inlet for the appropriate fan speed.

For information about the installation of the fan tray, see the Installing the Fan Tray section.

The A907-FAN-H has:

• Four dual rotor fans—for the PSU area cooling

• 12 fans (three columns for four fans)—60x60x38mm fans for the RSP and interface modules

This fan tray has redundant fans and provides side-to-side forced air cooling. A907-FAN-H is a field replaceable unit (FRU).

The following table describes the fan speed when used with the NCS4216-RSP-800 route processor.

Note	The system considers the temperature of the fan inlet for the appropriate fan speed.

For information about the installation of the fan tray, see the Installing the Fan Tray section.

The Cisco routers, interface modules, FAN-H, and FAN-E are designed to support online insertion and removal (OIR). However, time-to-OIR for FAN-H and FAN-E fan tray is dependent on the temperature of the chassis. At room temperature of up to 30° C, fan tray OIR should be done within two minutes.

Note	Before replacing the card, you must perform a graceful shutdown of the card to avoid disk corruption.

Note	It is not recommended to perform fan tray OIR above the ambient temperature of 40° C.

The following table describes the parameters for the OIR of the various modules in the router.

Note	Before replacing the card, you must perform a graceful shutdown of the card to avoid disk corruption.

Note	Consecutive IMs insertions, consecutive IMs reload or removal, and subsequent IM re-insertion should be done while waiting at least 180s between the actions.

The dust filter on the fan tray is a quadrafoam 45PPI filter which is 85 percent dust resistant. For installing the fan filter, see Removing and Replacing the Dust Filter section.

Air Plenum or air baffle assembly is used to change the air flow pattern of the unit. When the router is installed with the plenum, the air flow pattern is changed from side-side to front-back. The air flow front-back pattern provides a rack installation bay with a cool front zone and hot rear zone. For installing the plenum, see Installing the Air Plenum (A907-F2B-AIR) in the Rack section.

Note	When the air plenum and the fan filter are installed in the chassis, the system operating temperature is 55º C.

The door provides access to the shelf, and acts as a protective panel.

Cisco NCS 4216 supports the following RSP:

• NCS4216-RSP—Provides 8 GB of SDRAM, 20 Mb of TCAM memory on every ASIC.

• NCS4216-RSP-800—Provides 32 GB of CPU DRAM memory.

The RSP does not provide external network interfaces for user traffic. All network interfaces are provided through separate IMs.

The RSP provides the following features on the Cisco router:

• Centralized data plane, timing, and control plane functions for the system

• High-level control of interface modules

• Management functionalities for the router

• Control plane (host) CPU and associated memory in which Cisco IOS XE and Cisco IOS XR software and platform control software runs

• Nonvolatile memory for storage of software images, configurations, and system files

• Enabling and monitoring the health and presence of fan trays, interface modules, and power supplies

• Field replacement and hot-swap capabilities

The Cisco NCS 4216 chassis includes two RSP slots to allow for redundant RSPs. When the router uses redundant RSPs, one RSP operates in the active mode and the other operates in the hot standby mode. Removal or failure of the active RSP results in an automatic switchover to the standby RSP.

Note	Interface Module Slot support will vary based on Interface Modules used in other slots. For more information, refer the Configuration Guides for details.

The RSP supports the following network timing interfaces:

• BITS input/output port—RJ48 jack

• Wire Wrap Interface Through an Adapter

• 1 PPS input and output—Mini coax connectors

• 2.048 or 10 MHz input and output—Mini coax connectors

• Time of Day (ToD) or input/output port and 1 PPS input port—Shielded RJ45 jack

Network timing interfaces support redundancy in a redundant RSP configuration. Network timing interfaces on a redundant RSP remain in operation while the RSP is in hot standby mode.

The following figure summarizes the interfaces on the RSP module.

The high density 8x10 Gigabit Ethernet interface module supports eight 10 Gigabit Ethernet ports using SFP+ transceivers cages on the faceplate.

Note	It does not support XFP transceivers on the ports.

For more information about installing a 8X10GE module, see the Interface Module Installation section.

The single port 100 Gigabit Ethernet interface module supports100 Gigabit Ethernet port. The figure above shows the interface module.

For more information about installing a 1X100GE module, see the Interface Module Installation section.

The 2-port 100 Gigabit Ethernet Interface Module (NCS4200-2H-PQ) design supports only one 100G QSFP28 optics on Port 0. Port 1 is disabled with RSP3. It currently supports only one mode of operation with 100Gbps of traffic with RSP3.

For more information about installing a 1X100GE module, see the Interface Module Installation section.

Limitations

After any QSFP28 100G optics is inserted, it approximately takes around 10 seconds for the optics to be detected and link to come up. The optics requires this time delay to be complete the initiation and operation.

After inserting the cable or after unshutting the 100G interface, the 100G link may approximately take about 2 seconds to come up.

Note	QSFP-100G-SR4-S and QSFP-100G-LR4-S are the optics supported in the 2X100GE IM for the 16.10.1 release.

The 8-port 1 Gigabit Ethernet SFP interface module with the 1-port 10 Gigabit Ethernet interface module is a high density combination interface module. This module supports 8 Gigabit Ethernet SFP ports and 1 10 Gigabit Ethernet SFP+ port.

For more information about installing the 8X1 GE SFP + 1X10 SFP Gigabit Ethernet module, see the Interface Module Installation section.

The dual port 40 Gigabit Ethernet interface module supports the 40 Gigabit Ethernet port. The 40G interface is supported using QSFP+ optics. The figure above shows the interface module.

For more information about installing a 2X40 GE module, see the Interface Module Installation section.

For more information about installing a 1xSFP or CSFP and 8xSFP or CSFP, see Installing an Interface Module.

For more information on port numbering, see Configuring 8/16-port 1 Gigabit Ethernet (SFP/SFP) + 1-port 10 Gigabit Ethernet (SFP+) / 2-port 1 Gigabit Ethernet (CSFP) Interface Module chapter of the Cisco NCS 4200 Series Software Configuration Guide, Cisco IOS XE Fuji 16.7.x.

The OC-192 interface module with 8-port low rate CEM interface module is a high density combination interface module. This module supports 1 OC-192 port and 8 low rate CEM or 1 Gigabit Ethernet port.

For more information about installing the OC-192 interface module, see the Interface Module Installation section.

The NCS 4200 1-Port OC-192 or 8-Port Low Rate CEM 20G Bandwidth Interface Module, iMSG is a cost-effective interface module (IM) that supports CEM and Multiservice Gateway features on the OCn interfaces.

Note	The Multiservice Gateway features are not supported on this IM on Cisco IOS XE Release 16.12.1.

The NCS 4200 1-Port OC-192 or 8-Port Low Rate CEM 20G Bandwidth Interface Module, iMSG IM supports eight SFP optical interfaces supporting at OC-3/OC-12/OC-48/1G rates and a single SFP+ optical interface supporting at OC-192/10G.

This IM operates in two modes:

• 20G mode; uses two XFI lanes towards the system

• 10G mode; uses single XFI lane towards the system

The benefits of this IM are:

• Improves backplane efficiency

• Increases system capacity

• Increases client flexibility

The most important feature of the NCS 4200 1x10G MR + 8x20G LR CEM, iMSG IM is it provides more flexibility from the interface, which allows you to configure any interface speed on the OCn port irrespective of the IM bandwidth. The bandwidth restriction comes into effect only when the circuit is configured.

For example, you can configure the SFP+ port as an OC-192 and the other eight optical ports as OC-48 to have the total interface speed of 30G. However, if you configure only one STS-1 HO CEP on each port that will take only 9xSTS-1, which is equivalent to 500 Mbps (9 x 52Mbps x1.06) of the backplane traffic.

The 48 X T1/E1 interface module provides connectivity for up to 48 x T1/E1 ports through 3 high-density connectors on the front panel. Each port supports 16 TX and RX ports. For information on LEDs, see the Troubleshooting section.

For more information about installing the 48 X T1/E1 interface module, see the Interface Module Installation section.

The 48 X T3/E3 interface module provides connectivity for up to 48 x T3/E3 ports through 3 high-density connectors on the front panel. Each port supports 16 TX and RX ports. For information on LEDs, see the Troubleshooting section.

For more information about installing the 48 X T3/E3 interface module, see the Interface Module Installation section.

Note	If OC48 is enabled, then the remaining 3 ports are disabled.

For more information on the supported SFP modules, see the Cisco NCS 4200 Series Network Convergence System Interface Modules Data Sheet.