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Trunk cards. Description. Meridian 1. Document Number: Document Release: Standard 6.00 Date: April Year Publish FCC TM


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Meridian 1 Trunk Cards Document Number: Document Release: Standard 6.00 Date: April 2000 Year Publish FCC TM Copyright Nortel Networks All Rights Reserved Printed in Canada Information
Meridian 1 Trunk Cards Document Number: Document Release: Standard 6.00 Date: April 2000 Year Publish FCC TM Copyright Nortel Networks All Rights Reserved Printed in Canada Information is subject to change without notice. Nortel Networks reserves the right to make changes in design or components as progress in engineering and manufacturing may warrant. This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC rules, and the radio interference regulations of Industry Canada. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses and can radiate radio frequency energy, and if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at their own expense. SL-1 and Meridian 1 are trademarks of Nortel Networks. Trunk cards 4 Revision history Page 3 of 140 April 2000 October 1997 August 1996 August 1996 July 1995 December 1994 Standard This is a global document and is up-issued for X11 Release 25.0x. Document changes include removal of: redundant content; references to equipment types except Options 11C, 51C, 61C, and 81C; and references to previous software releases. This document incorporates the Generic Central Office Trunk Cards description and installation ( ). Standard, release This document is reissued to include information on the NT8D14BB (Release 10 and later), which provides identical functionality as the NT8D14 Universal Trunk card, but which has only three jumpers instead of the four present on previous versions of this card. Standard, release Changes are noted by revision bars in the margins. Standard, release Changes are noted by revision bars in the margins. Standard, release This document is reissued to incorporate technical corrections and indexing. Changes are noted by revision bars in the margins. Standard, release This is the intial release of this document. It supercedes: QPC71 E&M/DX Signaling and Paging Trunk Card description ( ) Recorded Telephone Dictation Trunk Cards description ( ) QPC237 4-Wire E&M/DX Trunk Card description ( ) Trunk cards Page 4 of 140 CO/FX/WATS Trunk Cards description ( ) QPC449 Loop Signaling Trunk Cards description ( ) QPC74 Recorded Announcement Trunk Card description ( ) NT8D14 Universal Trunk Card description ( ) NT8D15 E&M Trunk Card description ( ) Standard 6.00 April 2000 6 Contents Page 5 of 140 About this document NT8D14 Universal Trunk Card NT8D15 E&M Trunk Card NTCK16 Generic Central Office Trunk Cards Trunk cards Page 6 of 140 Contents Standard 6.00 April 2000 8 About this document Page 7 of 140 This document is a global document. Contact your system supplier or your Nortel Networks representative to verify that the hardware and software described is supported in your area. This document outlines the functions, specifications, applications, and operation of the various Meridian 1 trunk cards. This information is intended to be used as a guide when connecting the trunk cards to customer-provided equipment and central office trunk facilities. References See the Meridian 1 system planning and engineering guides for System Engineering ( ) Spares Planning ( ) Equipment Identification ( ) Summary of Transmission Parameters ( ) See the Meridian 1 system installation and maintenance guides for System Installation Procedures ( ) Circuit Card: Installation and Testing ( ) General Maintenance Information ( ) Fault Clearing ( ) Hardware Replacement ( ) Trunk cards Page 8 of 140 About this document See the X11 software guides for an overview of software architecture, procedures for software installation and management, and a detailed description of all X11 features and services. This information is contained in two documents: X11 System Management ( ) X11 Features and Services ( ) See the X11 Administration ( ) for a description of all administration and maintenance programs, and X11 System Messages Guide ( ) for information about system messages Standard 6.00 April 2000 22 Page 9 of 140 Content list The following are the topics in this section: Reference list 9 Overview 9 Selecting a trunk card 10 Intelligent peripheral equipment (IPE) trunk cards 10 Installation 12 Operation 13 Host interface bus 13 Trunk interface unit 20 Reference list The following are the references in this section: System Engineering ( ) Circuit Card: Installation and Testing ( ) Overview This document describes the various trunk cards that are used with the Meridian 1 switch. It describes the Meridian 1 architecture, the trunk cards themselves, and how the cards fit into the Meridian 1 architecture. It also shows how the cards are used at the customer site, and how they are installed and programmed. It also provides detailed technical specifications on each of the cards. Trunk cards Page 10 of 140 Selecting a trunk card Table 1 Trunk card characteristics The following trunk cards are described in this document: NT8D14 Universal Trunk Card NT8D15 E&M Trunk Card NTCK16 Generic Central Office Trunk Cards Each of the trunk cards was designed to fit a specific system need. Table 1 will help you select the trunk card that will best meet your needs. Part Number Trunks Trunk Types Architecture NT8D14 Universal Trunk Card 8 CO/FX/WATS trunks*, direct inward dial trunks, tie trunks, Loop Dial Repeating trunks Recorded Announcement trunks, Paging trunks NT8D15 E&M Trunk Card 4 2-wire E&M trunks, 4-wire E&M trunks, 4-wire DX trunks, Paging trunks IPE IPE NTCK16 Generic Central Office Trunk Card 8 CO trunks IPE * Central office (CO), Foreign Exchange (FX), and Wide Area Telephone Service (WATS) trunks. Intelligent peripheral equipment (IPE) trunk cards The following trunk cards are designed using the intelligent peripheral equipment (IPE) architecture, and are recommended for use in all new system designs Standard 6.00 April 2000 Page 11 of 140 NT8D14 Universal Trunk Card The NT8D14 Universal Trunk Card is an intelligent four-channel trunk card that is designed to be used in a variety of applications. It supports the following five trunk types: Central office (CO), Foreign Exchange (FX), and Wide Area Telephone Service (WATS) trunks Direct inward dial (DID) trunks Tie trunks: two-way loop dial repeating (LDR) and two-way loop outgoing automatic incoming dial (OAID) Recorded Announcement (RAN) trunks Paging (PAG) trunks The universal trunk card also supports Music, Automatic Wake Up, and Direct Inward System Access (DISA) features. NT8D15 E&M Trunk Card The NT8D15 E&M Trunk Card is an intelligent four-channel trunk card that is designed to be used when connecting to the following types of trunks: 2-wire E&M Type I signaling trunks 4-wire E&M trunks with: Type I or Type II signaling Duplex (DX) signaling paging (PAG) trunks The trunk type and function can be configured on a per port basis. Dialing outpulsing is provided on the card. Make and break ratios are defined in software and downloaded by software commands. NTCK16 Generic Central Office Trunk Card The NTCK16 generic central office trunk cards support up to eight analog central office trunks. They can be installed in any PE slot that supports intelligent peripheral equipment (IPE). The cards are available with or without the Periodic Pulse Metering (PPM) feature. The cards are also available in numerous countries. Trunk cards Page 12 of 140 Installation This section provides a high-level description of how to install and test trunk cards. For specific installation instructions, see Circuit Card: Installation and Testing ( ). Intelligent peripheral equipment (IPE) trunk cards can be installed in any IPE slot of the NT8D37 Intelligent Peripheral Equipment (IPE) Module. Figure 1 shows where an IPE trunk card can be installed in an NT8D37 IPE Module. Figure 1 IPE trunk cards installed in an NT8D37 IPE Module PE Module IPE Intelligent line cards Intelligent trunk cards BRSC NT8D01 Controller Card Intelligent line cards Intelligent trunk cards BRSC PE Pwr Sup Rng Gen Cont Intelligent Superloop Peripheral Equipment Shelf When installing trunk cards, these general procedures should be used: 1 Configure the jumpers and switches on the trunk card (if any) to meet your system needs. 2 Install the trunk card into the slot that you have selected Standard 6.00 April 2000 Page 13 of Install the cable that connects the backplane connector on the PE or IPE module to the module I/O panel. 4 Connect a 25-pair cable from the module I/O panel connector to the main distribution frame (MDF). 5 Connect the trunk card output to the selected terminal equipment at the MDF. 6 Configure the individual trunk interface unit using the Trunk Administration program (LD 14) and the Trunk Route Administration program (LD 16). Once these steps have been completed, the trunk card is ready for use. Operation This section describes how trunk cards fit into the Meridian 1 architecture, the buses that carry signals to and from the trunk cards, and how they connect to terminal equipment. See Table 2 for IPE parameters. Host interface bus Cards based on the IPE bus have a built-in microcontroller. The IPE microcontroller is used to perform local diagnostics (self-test), configure the card according to instructions issued by the Meridian 1 system processor, and report back to the Meridian 1 system processor information such as card identification (type, vintage, and serial number), firmware version, and programmed configuration status. Trunk cards Page 14 of 140 Table 2 Differences between IPE parameters Parameter Card Dimensions Network Interface Communications Interface Intelligent Peripheral Equipment x 25.4 x 2.2 cm. (12.5 x10.0 x in.) DS-30X Loops card LAN Link Microcontroller 8031 Peripheral Interface Card Network Interface Card Modules NT8D01 Controller Card NT8D04 Superloop Network Card NT8D37 IPE Module Intelligent peripheral equipment Intelligent peripheral equipment (IPE) trunk cards all have a similar architecture. Figure 3 shows a typical IPE trunk card architecture. The various trunk cards differ only in the number and types of trunk interface units Standard 6.00 April 2000 Page 15 of 140 Figure 2 Network connections to PE/IPE modules Common Equipment (Network) NT8D37 IPE Module NT8D04 Superloop Network Card DS-30Y loop NT8D01 Controller Card DS-30X NT8D14 Universal Trunk Card NT8D15 E&M Trunk Card NT8D13 PE Module QPC71 E&M Signaling and Paging Trunk Card QPC414 Network Card SL-1 Network loop QPC659 Dual-Loop Peripheral Buffer Card QPC74 Recorded Announcement Trunk Card QPC250 Release Link Trunk Card QPC449 Loop Signaling Trunk Card Trunk cards Page 16 of 140 Figure 3 Typical IPE trunk card architecture Input/output interface control PCM Codec Front panel LED Address/ data bus Trunk Interface Unit Tip Ring Trunk lines Microcontroller Backplane Card slot address Codec Card LAN interface PCM Async card LAN link Tx PCM Trunk Interface Unit Tip Ring Trunk lines Controller card Rx PCM 5.12 MHz clock 1 khz frame sync DS-30X interface Signaling and status Trunk signaling interface Trunk interface unit power Control Control logic Power Supplies Standard 6.00 April 2000 Page 17 of 140 The Meridian 1 switch communicates with IPE modules over two separate interfaces. Voice and signaling data are sent and received over DS-30X loops and maintenance data is sent over a separate asynchronous communications link called the card LAN link. Signaling data is information directly related to the operation of the telephone line. Signaling commands include, but are not limited to: off hook/on hook ringing signal on/off message waiting lamp on/off Maintenance data is data relating to the setup and operation of the IPE card, and is carried on the card LAN link. Maintenance data includes, but is not limited to: polling reporting of self-test status CPU initiated card reset reporting of card ID (card type and hardware vintage) reporting of firmware version downloading trunk interface unit configuration reporting of trunk interface unit configuration enabling/disabling of the DS-30X network loop bus reporting of card status Trunk cards Page 18 of 140 DS-30X loops The interfaces provided by the line and trunk cards connect to conventional 2-wire (tip and ring) line facilities. IPE analog line and trunk cards convert the incoming analog voice and signaling information to digital form and route it to the Meridian 1 common equipment (CE) CPU over DS-30X network loops. Conversely, digital voice and signaling information from the CPU is sent over DS-30X network loops to the analog line and trunk cards where it is converted to analog form and applied to the line or trunk facility. IPE digital line cards receive the data from the digital phone terminal as 512 khz time compressed multiplexed (TCM) data. The digital line card converts that data to a format compatible with the DS-30X loop, and transmits it in the next available timeslot. When a word is received from the DS-30X loop, the digital line card converts it to the TCM format and transmits it to the digital phone terminal over the digital line facility. A separate dedicated DS-30X network loop is extended between each IPE line/trunk card and the controller cards within an IPE module (or the controller circuits on a network/dtr card in a CE/PE module). A DS-30X network loop is composed of two synchronous serial data buses. One bus transports in the transmit (Tx) direction toward the line facility and the other in the receive (Rx) direction toward the Meridian 1 common equipment. Each bus has 32 channels for pulse code modulated (PCM) voice data. Each channel consists of a 10-bit word (see Figure 4). Eight of the 10 bits are for PCM data, one bit is the call signaling bit, and the last bit is a data valid bit. The 8-bit PCM portion of a channel is called a timeslot. The DS-30X loop is clocked at 2.56 Mbps (one-half the 5.12 MHz clock frequency supplied by the controller card). Thus, the timeslot repetition rate for a single channel is 8 khz. The controller card also supplies a locally generated 1 khz frame sync signal for channel synchronization. Signaling data is transmitted to and from the line cards using the call signaling bit within the 10-bit channel. When the line card detects a condition that the Meridian 1 switch needs to know about, it creates a 24-bit signaling word. This word is shifted out on the signaling bit for the associated channel one bit at a time during 24 successive DS-30X frames. Conversely, when the Meridian 1 switch sends signaling data to the line card, it is sent as a 24-bit word divided among 24 successive DS-30X frames Standard 6.00 April 2000 Page 19 of 140 Figure 4 DS-30X loop data format DS-30X loop data words Frame sync MHz 2.56 MHz Frame sync DS-30X loop data bits W31DV W0B7 W0B6 W0B5 W0B4 W0B3 W0B2 W0B1 W0B0 W0SB W0DV W1B7 SB = SIGNALING BIT DV = DATA VALID DS-30Y network loops extend between controller cards and superloop network cards in the common equipment, and function in a manner similar to DS-30X loops (see Figure 2). Essentially, a DS-30Y loop carries the PCM timeslot traffic of a DS-30X loop. Four DS-30Y network loops form a superloop with a capacity of 128 channels (120 usable timeslots). See System Engineering ( ) for more information on superloops. Card LAN link Maintenance communications is the exchange of control and status data between IPE line or trunk cards and the CE CPU by way of the NT8D01 Controller Card. Maintenance data is transported via the card LAN link. This link is composed of two asynchronous serial buses (called the Async card LAN link in Figure 3). The output bus is used by the Meridian 1 controller for output of control data to the trunk card. The input bus is used by the Meridian 1 controller for input of trunk card status data. Trunk cards Page 20 of 140 A card LAN link bus is common to all of the line/trunk card slots within an IPE module (or IPE section of a CE/PE module). This bus is arranged in a master/slave configuration where the controller card is the master and all other cards are slaves. The module backplane provides each line/trunk card slot with a unique hardwired slot address. This slot address enables a slave card to respond when addressed by the controller card. The controller card communicates with only one slave at a time. In normal operation, the controller card continually scans (polls) all of the slave cards connected to the card LAN to monitor their presence and operational status. The slave card sends replies to the controller on the input bus along with its card slot address for identification. In this reply, the slave informs the controller if any change in card status has taken place. The controller can then prompt the slave for specific information. Slaves only respond when prompted by the controller; they do not initiate exchange of control or status data on their own. When an IPE line or trunk card is first plugged into the backplane, it runs a self-test. When the self test is completed, a properly functioning card responds to the next controller card poll with the self-test status. The controller then queries for card identification and other status information. The controller then downloads all applicable configuration data to the line/trunk card, initializes it, and puts it into an operational mode. The network card regularly polls the PE cards during TS0 to see if any of them has a message to be sent. When a PE card has a message waiting it responds to the poll by sending a series of 1s during the next five successive timeslot 0s. The network card responds by sending a message send enable message (all 1s). The PE card replies by sending 1, 1, 1, 0, and then the message in successive timeslot 0s. Trunk interface unit Once the 8-bit digital voice signal has been received by the trunk card, it must be converted back into an analog signal, filtered, and driven onto the analog trunk line through an impedance matching and balance network. The trunk interface also includes the logic necessary to place outgoing call signaling onto the trunk, or the logic to connect to special services such as recorded announcement and paging equipment. Figure 5 shows a typical example of the logic that performs these functions. Each part of the trunk interface unit is discussed in the following section Standard 6.00 April 2000 Page 21 of 140 Figure 5 Typical trunk interface unit block diagram DS-30X or SL-1 Network loop CODEC Variable gain filters 2-wire to 4-wire conversion and balance network Isolation transformer Interface (protection) Tip Ring TS0 Signaling logic Signaling leads (E&M, DX, etc.) Coder/Decoder circuit The Coder/Decoder (codec) performs analog to digital (A/D) and digital to analog (D/A) conversion of the line analog voiceband signal to and from a digital PCM signal. This signal can be coded and decoded using either the A-Law or the µ-law companding algorithm. On some trunk cards the decoding algorithm depends of the type of codec installed when the board is built. On others, it is an option selected using a software overlay. Trunk cards Page 22 of 140 Variable gain filters Audio signals received from the analog phone trunk are passed through a low-pass analog to digital (A/D) monolithic filter that limits the frequency spread of the input signal to a nominal Hz bandwidth. The audio signal is then applied to the input of the codec. Audio signals coming from the codec are passed through a low-pass A/D monolithic filter that integrates the amplitude modulated pulses coming from the codec, and then filters and amplifies the result. On some of the trunk cards, the gain of these filters can be programmed by the system controller. This allows the system to make up for line
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