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Introduction
Depending on the central office (CO) protocol selected, you will need to enter some or all the following information for BRI setup:
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CO protocol |
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Service profile identifier (SPID) administration |
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Call appearance identification (CAID) administration (also known as CACH) |
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Phantom direct inward dialing identification (PDID) administration |
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Feature identification number (FIN) for message waiting |
Ordering BRI
The local exchange carrier groups involved with the provisioning of ISDN BRI are sometimes referred to under the following categories:
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Marketing-takes the request orders (first point of contact) |
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Service Orders-creates the ISDN order |
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NAC (Network Administration Center) or Line Assignment-assigns the directory numbers |
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RCMAC (Recent Change Memory Administration Center)-inputs orders into the central office switch |
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Tester-provides testing and trouble shooting of BRI subscriber lines |
Related Topic:
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Section 7.16, U.S. ISDN (for U.S. Only), on page 7-488 |
The following terms are used by customer premise equipment (CPE) vendors and exchange carriers for the ordering and provisioning of ISDN basic rate interface.
Alternate Circuit-Switched Voice/Circuit-Switched Data (CSV/CSD): This is a basic BRI feature that determines if a B channel supports voice, data, or voice and data. Most Hicom 150 E Office installations will be provisioned to support both voice and data.
Electronic Key Telephone System (EKTS): A central office (CO) setting that allows ISDN device to use traditional telephony features such as multiple calls to a device, transfer, conference, call hold, and extra directory numbers (DNs).
Basic Rate Interface (BRI): An ISDN subscriber line that supports three simultaneous channels (voice/data paths). The two, 64 kbps bearer or B channels are managed by an in-band signaling path (D channel). The D channel provides communications between the central office equipment and the Hicom 150 E Office for setting up, routing, and tearing down each call. A BRI is also commonly referred to as 2B+D or 2B+1Q.
Bit Error Rate Test (BERT): This is a test performed by a technician using an ISDN test set to determine line quality. The test process creates a loop to send and receive blocks of data and calculate discrepancies. With this test, the technician can isolate static and dropped calls caused by bad central office equipment and faulty outside plant cables.
Bonding: This is the process of combining B-channel bandwidths to increase data transfer capabilities; for example, bonding B1(64kbps) with B2(64kbps) would equal 128kbps.
Call Appearance Call Handling (CACH) EKTS: This term is specific to Lucent 5ESS and Siemens EWSD central office switches. The CACH setting allows the sharing of DNs across multiple channels and circuits. The number of shared call appearances determines how many concurrent calls to a specific directory number can be handled. For example, if a directory number has three call appearances, shared across three channels, then that number can be called three times before getting a busy signal. Refer to Table 8-1 for an illustration of how CACH is used across each B channel in a system. CACH is one of the methods used to have BRI emulate an analog hunt. Although there is a CACH setting in the NT DMS, it does not react the same; the CACH setting in the DMS does not allow the sharing of DNs.
Capability Package or Ordering Code: This BRI feature package simplifies the ordering process and is designed to meet the requirements of CPE vendor's products. The traditional method for establishing capability packages has been established by Bellcore, but today many exchange carriers are creating their own. Three capability packages created for the OfficePoint 9116 were H3, H4, and H5, but these packages were not widely understood by the exchange carriers and, in most cases, did not suit customer requirements.
Cause Codes: This refers to decimal and hex values that show cause and explanation for an action on an ISDN D channel. Refer to the BRI troubleshooting guide for a complete listing of these codes and definitions. Example: Cause Code 16 = Normal call clearing.
Directory Number (DN): The main difference between the DN on BRI and the DN on analog is that the DN on BRI can appear on multiple B channels unlike the DN on analog, which can only be assigned exclusively to a single subscriber line.
Integrated Services Digital Network (ISDN): This is the digital replacement for analog, plain old telephone service (POTS). Integrated services means that all communication types (voice, data, and video) use the same type of subscriber line. ISDN is the key ingredient in the Hicom 150 E Office architecture. ISDN is popular because of its data capabilities but is also rich with telephony features never before available on analog subscriber lines. The direct inward dialing (DID) capability is a popular Hicom 150 E Office ISDN feature.
ISDN Multiline Hunt Group (MLHG-I): Different DNs can be placed in a hunt group to provide management of incoming traffic.
Key Map or Key Sheet: The key map is a table of key definitions for BRI lines connected to the Hicom 150 E Office. BRI electronic key service allows users to define up to 64 keys (buttons) on each B channel. These keys can be defined as directory numbers, call appearances, or features. The use of keys was developed to use with individual ISDN voice terminals such as the Siemens NI-1200. For an example of an AT&T 5ESS and EWSD key map refer to Table 8-1. For an example of a DMS 100 key map refer to Table 8-2.
Key Short Hunt (KSH) (DMS 100 Switch Feature): This term is specific to Nortel DMS central office switches. Extra DNs can be assigned to keys on a B channel and associated with a PDN. The PDN, which is always on key 1 in the DMS, can then hunt to the extra DNs on the other keys, creating a hunt group. Once all the DNs are shared across multiple channels, the PDN can accept multiple calls. The number of PDNs, combined with the number of channels they are shared across, determines how many concurrent calls a PDN can handle. The key short hunt is the equivalent of CACH on the 5ESS. A key short hunt can only be assigned to a PDN.
Local Loop: This refers to the physical, single-copper pair connection between the local exchange carrier and the customer's premises. BRI subscriber lines cannot exceed 18,000 feet without the use of repeaters. Depending on the exchange carrier, this limit could impact the decision to order BRI. Some exchange carriers charge fees up to $1,500 per BRI for the repeater, while other exchange carriers include it, if necessary, at no additional cost.
Loop Qualification: This is the process of determining if the local exchange carrier has the proper facilities to deliver BRI. A proper BRI facility must include an 18,000-foot cable, a digital CO switch, and a test of the integrity of the copper pair.
Multiple Appearances Directory Number (MADN) (DMS 100 Switch Feature): This feature allows a directory number to appear on more than one B channel (terminal). The combination of KSH and MADN creates the functional equivalent of 5ESS CACH. The combination of KSH and MADN is a method used to have BRI emulate an analog hunt in a DMS. The Hicom 150 E Office requires that all DNs (primary and secondary) be shared across all B channels. Therefore, all DNs are MADN numbers, and all B channels are included in the MADN group.
National ISDN-1 (NI-1): This is the standard specification for an ISDN telephone. This specification is based on technical references specified by Bellcore that began the national ISDN infrastructure. Other National ISDN standards, NI-2 and NI-3, will simplify and expand the ISDN feature set.
Network Termination 1 (NT-1): The physical interface located at the customer's premises, which connects CPE to the ISDN subscriber line. The Hicom 150 E Office has an NT-1 built into every BRI trunk port.
Primary Inter-Exchange Carrier (PIC): This refers to the long-distance carrier responsible for routing any call to a directory number that is proceeded by a one.
PIC Code: All inter-exchange carriers (long distance) have an associated PIC code that is assigned to a directory number, which provides long-distance service exclusively for that directory number or call appearance. Every DN and its associated call appearances needs to be assigned a PIC code on every channel.
Primary Directory Number (PDN): This is the 10-digit telephone number within the SPID that is physically assigned to each B channel of an ISDN circuit. The PDN must be assigned to devices using central office features such as voice mail message waiting indicators, CO-based telephony features, and ISDN terminals that are connected to the Hicom 150 E Office S0-bus.
Recent Change Memory Administration Center (RCMAC): The RCMAC acronym is used by some local exchange carriers to describe the group that implements ISDN orders.
Repeater: A device connected to the outside plant cable span to provide ISDN service to customers beyond the 18,000 foot central office distance limit. This device cleans and regenerates the digital signal, and it ensures a signal loss of less than 42dB.
Secondary Directory Number (SDN): These numbers are additional directory numbers (DNs) ordered for an ISDN circuit. An SDN is a software only number, which is located in association to a PDN in the CO. SDN is used when assigning DID to an optiset E telephone or other analog device. Hicom 150 E Office ISDN terminals and CO message waiting indicators are not supported over an SDN.
Service Profile Identifier (SPID): An 8- to 12-digit number that uniquely identifies a B channel. Each BRI is assigned two SPIDS. For example, B1: 84780634710101 and B2: 84700633790101. SPID formats vary, depending on the local exchange carrier. Users should check with the local exchange carrier for the SPID format that the telephone service provider uses.
Sharing: This general term refers to a DN that appears across multiple channels. This is accomplished by CACH on 5ESS and by MADN on DMS. All PDNs and SDNs must be shared across all B channels when provisioning ISDN circuits for the Hicom 150 E Office.
S/T Interface: Two pair interface located on the CPE side of the NT-1. It is used to connect multiple devices to a single ISDN BRI subscriber line. Terminating resistors might be required for certain installations.
SYNC: This term is used to describe when a communication link over the D channel between the CO and the NT-1 is active. In addition, it also describes a communication link between the NT-1 and the terminal equipment.
Terminal Equipment Type 1 (TE1): This equipment type refers to any device that is ISDN ready (U interface).
Terminal Equipment Type 2 (TE2): This equipment type refers to non-ISDN ready devices that require terminal adaptors (terminal equipment type 1) to operate with ISDN (S/T devices, analog telephones, or serial ports on personal computers).
Terminal Adaptor (TA): This adaptor type connects non-ISDN ready devices to a digital network (ISDN). An NT-1 can be referred to as a TA.
Terminal Endpoint Identifier (TEI): Since up to eight devices can be connected to a single ISDN BRI subscriber line, the TEI is needed to identify in the D-channel signaling which of the eight devices is connected to the CO.
Terminal Identifier (TID): The TID is used for all National-1 ISDN services, and it is the last two digits (ranging from 00-62) following the SPID. The Hicom 150 E Office uses a universal TID, so the CO switch accepts any user-defined TID. Because each B channel needs a unique TID, the numbers in the Hicom 150 E Office are varied.
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847734197001-00 |
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847734197001-01 |
Terminal Type C (5ESS Switch Feature): This is the requested terminal type for voice capability features for the Hicom 150 E Office. There are five terminal types.
U Interface: This refers to the one pair distributed by the CO and is the interface between the CO and the CPE (NT-1).
Sample 5ESS & EWSD Key Sheet
A sample key sheet is provided to assist users in configuring their BRI parameters. The actual values must be obtained from the BRI ISDN provider. This table represents a virtual button map in the CO.
Table Key:
* The CAID or CACH value corresponds to the key; for example, keys 1-4 have CAID or CACH values associated with the number 734-1970. The amount of CAID or CACH values per number equals the amount of calls a number can make or receive.
** In this example, PDN 1 BRI 1 is associated with the primary directory number (PDN) 734-1970 with a corresponding SPID number of 84773419700100. PDN 2 BRI 1 corresponds to the PDN 734-1971 with a corresponding SPID number of 84773419710101.
In this example, PDN 1 BRI 2 is associated with the PDN 734-1973 with a corresponding SPID number of 84773419720100. PDN 2 BRI 2 corresponds to the PDN 734-1973 with a corresponding SPID number of 84773419730101.
In this example, PDN 1 BRI 3 is associated with the PDN 734-1974 with a corresponding SPID number of 84773419740100. PDN 2 BRI 3 corresponds with the PDN 734-1975 with a corresponding SPID number of 84773419750101.
Example: AT&T 5ESS CO protocol
Using Hicom Assistant T and referring to Table 8-1, this example illustrates how to select the CO protocol.
Example: SPID Administration
Using Hicom Assistant T and referring to Table 8-1, this example illustrates how to enter SPID numbers for stations 11-14.
Example: CAID or CACH Administration
Using Hicom Assistant T and referring to Table 8-1, this example illustrates how to enter the CAID values for stations 11 and 12.
Sample DMSS 100 Key Sheet
Example: DMSS 100 Protocol
Using Hicom Assistant T and referring to the Table 8-2, this example illustrates how to select the CO protocol.
Example: SPID Administration
Using Hicom Assistant T and referring to Table 8-2, this example illustrates how to enter SPID numbers for stations 11-14.
Example: PDID Administration
Using Hicom Assistant T and referring to Table 8-2, this example illustrates how to enter PDID parameters for station 11.
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Hicom 150 H V1.0 - Hicom 150 E Office Rel.2.0-3.0 Service Manual | Siemens Part No.: P31003-M1550-X403-3-7620 | Conversion Date: 2000-08-24 |
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Contact: E-Doku-Team | © Siemens AG 2001 |