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Site preparation begins with the identification of the service circuit and interface requirements of a customer site. This information translates into the configuration of an MGX 8260 media gateway with site-specific port capacity, interface and service circuit cards, as well as database configurations.
All of the above determine the number of components in the configuration, as well as cabling requirements. The following are general guidelines for preparing the installation site:
Installation, administration, and maintenance of a MGX 8260 site requires the services of several specialists, including:
Cisco MGX 8260 nodes are housed in 19-inch or 23-inch equipment racks. Intercabling, intranet configuration, and initial switch configuration are completed as part of the integration process. The MGX 8260 is shipped assembled with cards installed. Mounting brackets are shipped separately and the switch must be installed into a rack at the customer site.
The general sequence for Cisco MGX 8260 component installation is as follows:
1. Install racks as needed at the installation site.
2. Unpack and move the MGX 8260 to the installation site.
3. Connect building ground to the MGX 8260 chassis.
4. Connect network cabling to the MGX 8260.
5. Complete alarm connections to the MGX 8260.
6. Connect power feeds to the MGX 8260.
7. Configure MGX 8260 intranet and management connections (Telnet).
8. Configure the MGX 8260 database (Cisco WebViewer).
9. Begin system testing.
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Note This installation process does not describe how to install an external media gateway controller (MGC) to interoperate with the MGX 8260. |
Consult the following lists when you plan for an MGX 8260 installation. These lists provide general considerations for MGX 8260 site preparation. Refer to your sales order and customer requirements documentation prepared by Cisco Systems for detailed configuration information specific to the installation site.
1. Verify that doors, loading dock, shipping/receiving area, and pathways have adequate room for unloading and moving of the MGX 8260 to its installation site. For MGX 8260 chassis and shipping container dimensions and weight, refer to "System Specifications".
2. The equipment rack into which the MGX 8260 will be installed should be in place and secured to structural members with adequate available space to mount the chassis.
3. The target equipment rack should provide recommended access clearances of 36 inches (91 cm) at the front and rear.
4. Identify rack locations for ancillary equipment, such as test equipment, power supplies, fuse/alarm panels, patch panels, etc.
5. Determine cable routes from demarcation points to the MGX 8260. Cable lengths must be within the maximum allowable distances for clear signal transmission. Cables should be fabricated and installed prior to system installation.
6. Have cable and wiring support devices been ordered/installed?
7. Determine if a maximum heat load of 6,200 BTUs per hour per node is within current HVAC capacity at the site. Identify changes to HVAC, if necessary.
1. The existing DC power plant should be able to supply one (nonredundant) or two (redundant) 40-amp -48 VDC feeds to the MGX 8260 chassis. If this amount of power cannot be supplied by the existing power plant, how will power requirements be met?
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Warning When carrying emergency (911) traffic, the MGX 8260 must be powered from redundant uninterruptible power sources. |
2. DC power feeds should be terminated near the MGX 8260 chassis. The feeds must be run through an external disconnect device, because the MGX 8260 does not incorporate an internal disconnect device.
3. The MGX 8260 chassis must be connected to a building ground point using 8 AWG cable and a 2-hole compression fitting. Building ground must be available at the equipment rack.
1. Identify ingress and egress WAN circuits (DS1 [T1], E1, DS3 [T3], OC-3, FE) to the MGX 8260.
2. Identify switch types and interface requirements for each carrier sourcing ingress and egress circuits to the MGX 8260.
3. Determine total and types of spans or intermachine trunks (DS1, DS3, ISDN-PRI, OC-3) that will terminate at the MGX 8260.
4. The DSPs on Narrowband Service Cards (NSCs) are preconfigured to support G.711 voice coding. Will support for other codec types be required?
5. If SS7 signaling is employed, what is the status for provisioning the circuits? Will the circuits be available by the scheduled installation date? Will certification with the SS7 providers be required?
6. DSX panels must be provided if 50-pin (RJ-21) back cards are used with the NSCs. Have the panels and associated cabling been ordered and space allocated for their installation?
1. Identify need for Ethernet or serial connections for media gateway access.
2. Obtain IP addresses for primary and secondary access to each MGX 8260 SCC.
3. Determine the number and type of required Ethernet media drops.
4. If Fast Ethernet (100BASE-TX) connections for VoIP are required, obtain IP addresses for the Fast Ethernet ports. For VoIP applications, the MGX 8260 supports up to four Fast Ethernet interfaces.
5. An analog modem may also be used for remote maintenance. If modem access is desired, is an analog line terminated on an RJ-11 jack near the MGX 8260 location?
If the alarm contacts from the MGX 8260 will be connected to a Central Alarm Monitoring System (CAMS), what are the cabling requirements between the CAMS and the MGX 8260?
Cisco Media Gateway Manager (CMGM) can deploy, configure, and manage a group of MGX 8260 media gateways in one or more points of presence (POP). If this site employs CMGM as an Element Management System (EMS), the CMGM server and clients should be installed and operating.
For additional information, refer to the Cisco MGX 8260 CMGM User Guide.
Posted: Sat Sep 28 22:20:40 PDT 2002
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