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Chapter 2

Installing the Hardware

2.1 Introduction

2.2 System Requirements

2.3 Configuring the Board's I/O Address Space

: 2.3.1 Changing the I/O Address

2.4 Setting Up CT Bus Connectivity

: 2.4.1 Clock Masters and Slaves
: 2.4.2 Connecting to H.100 Bus Boards

2.5 Installing Boards In Your System

2.6 Connecting to a Power Supply

: 2.6.1 Connecting a Ringing Power Supply
: 2.6.2 Connecting a Non-Ringing Power Supply (North America only)
: 2.6.3 Grounding the PC Chassis and Power Supply

2.7 Connecting to Local Phones

: 2.7.1 Providing Lightning Protection

2.8 Notes on Modem Connections

2.1 Introduction

This chapter describes how to configure your CX 1000 board, install it in your system, and connect it to the MVIP bus and local network. Caution: CX 1000 boards are shipped in protective anti-static containers. Leave the board in its container until you are ready to install it. Handle the board carefully and only hold it by its edges. We recommend that you wear an anti-static wrist strap connected to a good earth ground whenever you handle the board. Take care not to touch the gold fingers which plug into the ISA bus connectors.

Caution:	CX 1000 boards are shipped in protective anti-static containers. Leave the board in its container until you are ready to install it. Handle the board carefully and only hold it by its edges. We recommend that you wear an anti-static wrist strap connected to a good earth ground whenever you handle the board. Take care not to touch the gold fingers which plug into the ISA bus connectors.

2.2 System Requirements

Since the CX 1000 is used with additional MVIP-compatible boards, the exact requirements depend on all boards in the system. A typical PC should have: A grounded chassis. An available 16-bit ISA bus slot. One of the following operating systems: Windows NT 4.0, OS/2 2.11 or later, UnixWare 2.1.x or 7, SCO OpenServer 5, or Solaris 2.6 or Solaris 7. An uninterruptable power supply (UPS). Although a UPS is not strictly required, it is strongly recommended for increased system reliability. Note that the UPS need not power the PC's video monitor.
In addition, you will need: An MVIP cable to connect your boards together on the MVIP bus. The cable length and number of connectors on the cable should not greatly exceed the number of boards in your system. An external "talk battery" power supply, to power the local phones connected to the card. For details, see Section 2.6.1. An adapter cable to connect your CX 1000 board to your local phone lines, and to the power supply (if you need one). For details, see Section 2.6. Note: MVIP-95 is a subset of the H.100 bus specification. Thus CX 1000 boards are also interoperable with H.100 bus systems. To connect a CX 1000 board to the H.100 bus, you can use a special adapter available from NMS. For details, see the Getting Started with MVIP Switching manual.

2.3 Configuring the Board's I/O Address Space

CX 1000 boards each occupy 16 contiguous I/O addresses. These addresses must be unique and must not conflict with any other devices in your system.
To select a base address, find the I/O address switches on the face of the board and change their settings. Make a note of the base I/O address that you set the board to use. The driver software installation program you use later will prompt you for this address.

2.3.1 Changing the I/O Address

To change the I/O address for CX 1000 boards: Find the I/O address selector switches on the face of the board. The switches are shown in Figure 7: Figure 7. Board Components Set the switches as directed in the table below: Base Address (Hex) Switch Setting Base Address (Hex) Switch Setting 0140 2140 0160 2160 0220 2220 0240 2240 0540 2540 0560 2560 0620 2620 0640 2640 Caution: Do not modify any other switches or jumpers on CX 1000 boards.

Base Address (Hex)	Switch Setting	Base Address (Hex)	Switch Setting
0140		2140
0160		2160
0220		2220
0240		2240
0540		2540
0560		2560
0620		2620
0640		2640

Caution:	Do not modify any other switches or jumpers on CX 1000 boards.

2.4 Setting Up CT Bus Connectivity

CX 1000 boards provide full support of the MVIP-95 and MVIP-90 switching model. Since MVIP-95 is a subset of the H.100 bus specification, CX 1000 boards are also interoperable with H.100 bus systems. The bus allows boards to share data and signaling information with other boards on the bus, using a ribbon cable to which they are all connected. For example, you can add DSP resources, analog station interfaces, or loop start line interfaces using other AG boards. You can also use MVIP-compatible products from other manufacturers with the AG board.
This section explains how to set up your hardware so that you can enable MVIP or H.100 connectivity in your system.

2.4.1 Clock Masters and Slaves

In a single PC chassis with multiple boards on an MVIP or H.100 bus, one board drives the bus and clock signals. The board that drives the bus clocks is called the bus clock master. All the timing signals are passed across the bus from the clock master.
All other boards (clock slaves) reference their clocks from the bus. See Getting Started With MVIP Switching for more information on telephony bus clocking.
Some boards can act as the clock master, while others cannot. (To determine the capabilities of other boards, see the documentation which came with those boards.)
A CX 1000 board can be configured as a clock master or slave. For details, see Section 5.6.
If the CX 1000 board connected to the H.100 bus using the bus adapter, it must be configured as a slave. For details, see Section 2.4.2.
Position the clock master board as close to the center of the bus cable as possible. All other boards should be distributed around the clock master, as shown in Figure 8. Figure 8. Arranging MVIP Boards in your System
If you have many boards connected to the MVIP bus in your system, use a Teflon MVIP cable (available from NMS). You must use the Teflon cable if you have more than 12 boards connected to the MVIP bus in your system.

2.4.2 Connecting to H.100 Bus Boards

The MVIP bus adapter connects the H.100 bus to the MVIP bus. This allows boards connected to the H.100 bus to access the MVIP bus, and allows MVIP boards to access the first 16 streams of the H.100 bus.
If your system contains the CX 1000 board and H.100 boards, you must use the MVIP bus adapter. The MVIP bus adapter connects the MVIP bus to the H.100 bus as shown in Figure 9. Only one MVIP bus adapter is required in a system.
The MVIP bus adapter connects to one of the H.100 boards in your system. To learn how to connect the MVIP bus adapter, see the installation manual for the H.100 board. Note: The MVIP bus adapter extends the length of the bus and may reduce the total number of boards that may be supported on the MVIP/H.100 bus. Figure 9. H.100 Bus Interoperability with MVIP Bus
When connecting to the MVIP bus adapter, an H.100 board must serve as the clock master. The first 16 streams of the H.100 bus must be configured to run in MVIP-90 mode (clocked at 2 MHz). Note: In a system that contains H.100 bus boards, MVIP-90 boards, and an MC1 board, the MC1 board must be the clock master.
The two boards located at the end of the H.100 bus must have bus termination enabled.

2.5 Installing Boards In Your System


Caution:	In ungrounded or poorly grounded PC chassis, potentially lethal voltages can build up (for instance if the PC power cord has only two prongs on its plug, as is the case in Japan, the Philippines, and some other countries). In these cases, ground the PC with a separate ground wire, as discussed in Section 2.6.3. In addition, make sure all peripheral equipment (e.g., external power supplies, etc.) are grounded as described in Section 2.6.3. Required grounding of the PC is provided automatically if the power plug on your PC's power cord has three prongs. This is true in the US, much of Europe, and many other countries worldwide.

To install CX 1000 boards in your system: If necessary, configure the board's I/O address as described in Section 2.3. Turn off the computer and disconnect it from the AC power source. Remove the cover and set it aside. Arrange all your CX 1000 boards and other MVIP boards in empty 16-bit ISA slots. If your system contains only MVIP boards, make sure the MVIP board you will use as clock master is positioned centrally, as described in Section 2.4. Connect the MVIP bus cable to the MVIP connectors on your boards. The board you have designated as clock master should be connected to a central connector on the cable. On the CX 1000 board, make sure that pin 1 of the MVIP cable (marked with a colored strip) is on the side of the connector away from the metal end bracket. For best results, the length of the cable and the number of connectors on the cable should not greatly exceed the number of boards connected to it. Caution: As you insert the MVIP bus connectors, make sure that the pins are lined up properly. If the connector is not lined up with the header, you may bend or break a header pin. NEVER pull out the connectors by pulling the cable. Always use the white pull-out tabs to remove the MVIP bus connectors. If your system contains H.100 boards: Arrange your H.100 boards in adjacent slots. Make sure each is seated securely in a slot. Connect your H.100 boards with an H.100 bus cable. Connect the MVIP bus adapter to the H.100 board nearest your MVIP boards. Connect the H.100 bus cable between them. Connect the MVIP cable to the MVIP bus adapter. Fasten each board's end bracket to the back of the chassis. Note: An AG board is not electrically connected to the MVIP bus unless its software configuration specifically enables it. Attaching the cable to the board does not affect its connectivity status. Connect the ground stud on the rear bracket to a good earth ground. Use a wire with a #4 terminal ring. Ensure that the nut is tight. Replace the cover, and re-connect the computer to its AC power source. Now connect the CX 1000 board to your local lines, and connect the external power supply, as described in the following sections.
Now connect the CX 1000 board to your local lines, and connect the external power supply, as described in the following sections.

Caution:	As you insert the MVIP bus connectors, make sure that the pins are lined up properly. If the connector is not lined up with the header, you may bend or break a header pin. NEVER pull out the connectors by pulling the cable. Always use the white pull-out tabs to remove the MVIP bus connectors.

2.6 Connecting to a Power Supply

CX 1000 boards require -24 Volt, 1 amp to provide "talk battery" to power the local phones. To support ringing of local phones, they also require 93V AC, 120mA to power ring generation.
On the CX 1000 board's end bracket is a high density female D-subminiature jack which you can use to connect the board to the local phones and to an external power supply.

2.6.1 Connecting a Ringing Power Supply

If your CX 1000 board will ring local phones, follow the procedures in this section to connect a power supply that will power ring generation.
NMS recommends various power supplies for different countries, depending upon "household" current levels. The following sections describe recommended configurations. Connecting in 110VAC Countries
For 110 VAC countries, we recommend using a Viking power supply (NMS part no. 2961).This supply generates both voltages. You can connect the leads from the adapter cable (NMS part no. 31839) directly to this power supply. To do so:

Make sure the power supply's power cord is NOT plugged in.

Connect the cable's blue lead to the -DC Output (-24V DC) terminal on the power supply.

Connect the orange lead to COMMON (ground).

Connect the white lead with the thin blue stripe to the AC Output (93V AC) terminal.

There is a white lead with the thin orange stripe, and a green wire, both attached to the same spade connector. Connect this lead to COMMON (to properly ground the board, both this lead and the orange lead must be connected to COMMON).

Connect the cable's DB62 connector to the CX 1000 board.

Connect the power supply to a 110VAC, 47-63Hz AC power source.

Make sure the power supply is properly grounded (see Section 2.6.3).

To verify that the power is properly connected, use the board's LEDs (described in Section 4.2.1).

Figure 10. Connecting a CX 1000 to a Ringing Power Supply (110 VAC)

Connecting in 220 or 240 VAC Countries
We recommend the CNB power supply (P/N 5542) for 220 or 240 VAC countries.
The CNB power supply comes with an attached cable that connects to the board and to the telephone company interface. (See Figure 11.) Note: Both the power cord and the phone cable must be equipped with a ferrite block to meet the EMC European requirements.
To connect this power supply: Connect the power supply's DB62 connector to the CX 1000 board. Connect the power supply to a 230VAC, 50Hz AC power source. Make sure the supply is properly grounded, as described in Section 2.6.3. To verify that the power is properly connected, use the board's LEDs (described in Section 4.2.1). Figure 11. Connecting a CX 1000 to a Ringing Power Supply (220/240 VAC)

2.6.2 Connecting a Non-Ringing Power Supply (North America only)

If your CX 1000 board will not need to ring local phones, follow the procedures in this section to connect a power supply that provides -24 Volt, 1 amp "talk battery" loop current only.
We recommend using a Tellabs power supply (NMS part no. 2169). To connect the power supply:

Connect the cable's blue lead to the - (-24V DC) terminal on the power supply, as illustrated in Figure 12.

Attach a jumper between the + and COM terminals.

Connect the white lead with orange stripe, and the green lead to the COM (ground) terminal.

Make sure the supply is properly grounded, as described in Section 2.6.3.

Figure 12. Connecting a CX 1000 Board to a Non-Ringing Power Supply

2.6.3 Grounding the PC Chassis and Power Supply

To ensure NMS boards operate correctly, and to prevent potential electrical shock, make sure your PC and the external power supply are properly grounded, and bonded (electrically connected) to each other.

3-Wire AC Systems: In countries that use grounded 3-prong AC power systems, make sure both the PC and the power supplies have grounded power cords (e.g., three prongs). The PC and the power supplies should be plugged into the same grounded circuit.

2-Wire AC Systems: If the wiring in your building does not have a ground-ing connection (e.g., outlets are 2-prong), you must provide a safety ground wire to the PC chassis, and connect a ground wire from the grounded PC chassis to any connected power supplies or other PCs in the same system. NMS recommends 14 gauge (approximately 1.5 mm diameter) ground wires. At each power supply, attach the ground wire to the "COMMON" or "+24VDC" terminal, or, if the supply does not have these terminals, to a screw on the power supply housing. The source of the safety ground for the PC(s) and external power supplies (for 2-prong systems) should be at least a 14 gauge wire to a low-resistance ground point, such as a thick ground or neutral wire at the AC power panel, a metal water pipe that provides a continuous metal path to the earth, or a grounded metallic structural building member.

2.7 Connecting to Local Phones


Warning:	Important Safety Notes for Telephony Connections · Installation of this board and associated telephone wiring is to be performed only by competent technical personnel. · Make sure the PC chassis is grounded through the AC power cord or by other means before connecting the telephone line. · Never install telephone wiring during a lightning storm. · Never install telephone jacks in wet locations unless the jack is specifically designed for wet locations. · Safety regulations require that you properly ground the board by connecting the ground stud on the rear bracket to a good earth ground (as described in Section 2.5, Installing Boards In Your System). · If your site connects to private lines that leave the building, make sure that external protection is provided as described in Section 2.7.1.

To connect to local phones, use the DB62 connector on the cable. Refer to Appendix D for a list of signal and pin numbers on this connector.
NMS recommends 24 AWG (0.6 mm) twisted pair cable for distances over 50 feet (15 meters). The following is a list of recommended cable types and maximum distances for each: Cable Type Recommended Maximum Distance 24 AWG twisted pair 2000 feet 0.6 mm twisted pair 700 meters
If any section of the wiring between the board and connected local phone lines runs outdoors or between buildings (buried or above ground), or your lines are more than 500 feet (152.5 meters) long in a non-metallic building, be sure to provide adequate lightning protection. For details, see Section 2.7.1.

Cable Type	Recommended Maximum Distance
24 AWG twisted pair	2000 feet
0.6 mm twisted pair	700 meters

2.7.1 Providing Lightning Protection


Warning:	If any section of the wiring between the board and connected local phone lines runs outdoors or between buildings (buried or above ground), you must add a well-grounded lightning protection device in the circuit between the line and the NMS equipment. For lines that run between buildings, you or the approved installer must provide primary protectors at the building service entrance point. These can be carbon block or gas discharge protectors, but solid-state protectors are recommended.

Note: The NMS warranty does not cover damage by lightning or other electrical discharge. You must add the external protector to obtain warranty coverage for NMS station cards connected to inter-building wiring.

2.8 Notes on Modem Connections

The CX 1000 interface can provide the same grade of connection to high-speed modems (such as V.34 and V.90) as PBXs and telephone office switches. However, the speed of the connections is not guaranteed to be at the highest rates. Important system factors in obtaining optimum modem performance are: Cables from the CX 1000 to the modem must be short, telephone grade twisted pair. Avoid routing cables near noise sources. Avoid moisture in cables. There should be only one 2-wire analog loop connection from the modem to the ISP. Also, there should be at most one analog-to-digital and one digital- to-analog conversion in the link from the modem to the ISP. Digital trunks to the public network are preferred for V.34 and required by V.90 technology. Add loss in the uplink connection to speed up the downlink connection if analog trunks are used.
Note that even with the above precautions, network impairments like noise, echo, or distortion can continue to limit modem performance, causing slower transfer speeds than desired. These are limitations of the network and modem technologies.

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