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Starplus Triad Xts Digital Key Telephone System System Programming And Operation Manual
Starplus Triad Xts Digital Key Telephone System System Programming And Operation Manual
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General DescriptionC-3 Appendix C - Networking Systems General Description Networked telephone switches can be installed in one building or miles apart; however, each call appears as though it is an intercom call. The use of ISDN, specifically Primary Rate Interface (PRI), is used to create a star topology which has a “Hub” as a central point connecting to as many as five “Node” switches. The Hub system is capable of interfacing one centralized voice mail that can easily be accessed by each node system. When centralized voice mail is used, it is easy to integrate and allows each node system to make an intercom-type call to access their voice mailboxes. For centralized voice mail, use the Pathfinder system. Supported Features Allows for partial PRIBs in clusters of four COs at a time 4-digit dialing between all Nodes DSS/BLF Intercom-type calling between Nodes Call forwarding between Nodes Paging between Nodes Call transfer with caller ID passing between Nodes Centralized voice mail capability Directory dialing between Nodes Leading digit Direct access mailbox buttons per voice mail group Multiple mailboxes per key station/digital telephone Centralized LCR Centralized CO ring assignments DID routing between Nodes Capacities A Hub or an individual Node cannot have a voice mail of 24 ports or greater, or one that handles 1000 calls per hour, because it will likely cause a bottleneck. Hardware The Networking interface requires the following boards: Primary Rate Interface Boards (PRIB) Channel Service Units (CSU), when KSUs are greater than 50 feet apart. Although a primary function of networking systems together is cost savings, it is mandatory that each Node has local access to emergency 911 calling.
C-4General Description Appendix C - Networking Systems Standards ISDN Primary Rate Interface (PRI) Board Vodavi has created a proprietary ISDN interface that ties two or more Vodavi telephone systems together using PRI cards. The use of PRI cards allows Vodavi to convert the 24th channel into a “D” channel. That channel passes the call processing information, while leaving 23 channels for voice processing. This PRI must be running error-free prior to attempting any networking of systems. Each Node site requires a link to the Hub site using ”Star-type” topography (refer to Figure C-1: Network Configuration Diagram). The maximum number of connections possible in the XTS is ten. A call will not hop more than twice (go through more than two switches) before reaching its destination. If a centralized voice mail is in the configuration, it will be installed at the Hub. Figure C-1: Network Configuration Diagram Terminal Emulation (TE) and Node Transmission (NT) are explained in Designing a Network. If KSUs are more than 50 feet apart or they are in different buildings, a CSU is required at both ends. If KSUs are less than 50 feet apart and they are in the same building, CSUs are not required. In a DSU/CSU, the 24th channel must be identified as a “D” (data) channel. TE Node Voice Mail NT Hub TE NodeTE Node TE Node TE Node
Designing a NetworkC-5 Appendix C - Networking Systems Designing a Network When more than one telephone switch is connected together, it is considered a network in its simplest form. One system is considered the Main or Hub system (NT). The other is the secondary or Node System (TE). There can only be one Hub (NT) and it cannot be attached directly to another Hub (NT). Therefore, a Hub can only be connected to a node (TE). Similarly, a node (TE) can only be connected to a Hub (NT) and it cannot be connected to another node (TE). The key to managing a network is being able to maintain a clear flow of traffic and making sure there is no bottleneck of calls at the Hub. Network Termination (NT ) Generally, the Hub is the largest system and it has the most connections to the PSTN interfaces. Because of this, it is more likely to be overloaded with calls and it needs to be monitored closely to maintain free-flowing calls and information. A bottleneck will interfere with voice quality. Terminal Equipment ( TE) A Node is generally a smaller less-active switch. However, it is just as important to monitor each Node for processing speeds to eliminate calling problems. Because calls can make multiple hops, it is important that all switches have an adequate number of interfaces to eliminate bottlenecks. Connecting to Remote Devices A loop button is required to call between Nodes. If a station wants to establish a conference between Nodes, it requires a second loop button. Therefore, it is recommended that each station have at least two (2) loop buttons. Smart Trunks When a call is passed from one KSU to another KSU and back to the original KSU, the second loop will drop after the call is answered. For example, a call is presented to System A, the caller is transferred to System B, and then the call is forwarded back to System A. When the call is answered in System A, the CO loop from System A to System B is dropped and the call is only active in System A. The Numbering Plan Numbering must be carefully considered when planning a network. Each Node must have a unique number to eliminate any conflicts. However, the entire network must have a basic layout plan to eliminate duplicating extension numbering. The cornerstone to networking is the “Networking Tables”. The system compares every call that comes from within the system with the internal numbering plan first (Flash 52 programming). Then the system checks the range of extensions in the first entry of the networking table (Flash 16 programming). If a match is found, the call is made.
C-6Designing a Network Appendix C - Networking Systems If a match is not found, the system continues checking the next entry of the networking table until a match is found or until it has examined each entry. If a match is not found within any of the entries, an error tone sounds. Each Network has its own “line group”, which is its address. For example, Ta b l e C - 1 shows that a call to extension 3500 will ring the switch that is connected in line group 2. The top portion (system configurations) and bottom portion (Networking tables) of Figu re C-11 are integrated to show how the networking table setup affects information passing in a two-node system. Figu re C-12 is an example of a five-node system. Table C-1: Networking Tables - Example 1 Table Number CO Group Station Range System Association Status Check FROM TO External 01 00 1000 1999 02 02 2000 2999 03 03 3000 3999 04 04 4000 4500 05 05 4501 4599 : : : 16 NOTE -- CO Group 00 = internal numbering plan Table C-2: Networking Tables - Example 2 Table Number CO Group Station Range System Association Status Check FROM TO External 01 00 1100 1199 02 02 2100 2199 03 03 3100 3352 04 04 4100 4250 : : : 16 NOTE -- CO Group 00 = internal numbering plan
Network InstallationC-7 Appendix C - Networking Systems Extension Numbering Valid extension range numbering is between 1000 and 8999. Numbering conflicts must be avoided. For example, if stations 100, 200, and 300 exist, the numbers 1000, 2000, and 3000 are conflicts. This is because the system detects the first three digits as validly assigned. Therefore, the system is not prepared to accept a fourth digit. Feature Code Numbering Feature codes must be unique numbers that pose no conflicts. Therefore, the feature code numbering plan cannot conflict with station numbering. For example, a station numbered 4400 is a direct conflict to the default voice mail group “440”. Leading Digit Enabling the leading digit feature quickly changes station and feature codes by placing a digit in front of the current 3-digit codes. For example, several Nodes can have stations 100-351. To make station numbers unique, the leading digit can be programmed as 1, 2, 3, etc. to result in station numbers of 1000-1351, 2000-2351, 3000-3351, etc. Feature codes will then also have a leading digit assigned. For example, feature code 700 will result in feature codes of 1700, 2700, 3700, etc. Network Installation Network Distance If KSUs are greater than 50 feet apart, connect them through TELCO using a point to point T-1 (Refer to Ta b l e C - 3 and the note on page C-4). If each KSU is less than 50 feet apart and there is no TELCO connection, then connect them using a straight-through connection (refer to Figu re C-2 and Ta b l e C - 5 ). Connections between Nodes and either a Hub or to TELCO always use the straight-through connection. The “#” key can not be a leading digit when networking systems together. Pound (#) is a reserved digit, for the termination of specialized features such as LCR. Table C-3: TELCO to Hub Interconnect Diagram - Pin Connections TELCO Hub (NT) RJ45 DB15 Female Pin # 1-->
C-8Network Installation Appendix C - Networking Systems Figure C-2: PRI Connector ISDN and T-1 Clocking When using PRIB or T-1 cards in one KSU, specific settings are important for proper clocking. Popping, crackling, dropped calls, and one-way transmission are usually attributed to the clocking not being synchronized correctly. It is preferable to use a TELCO PRI to establish clocking for the Network (Figure C-4 ). If no TELCO PRI or T-1 is available, then clocking will be controlled by the Hub system (all PRI clock switches enabled) for the entire Network (Figure C-5 ). The following examples are provided to illustrate proper clocking settings under given scenarios. Table C-4: TELCO to Node Interconnect Diagram - Pin Connections TELCO Node (TE) RJ45 DB15 Female Pin # 1-->
Network InstallationC-9 Appendix C - Networking Systems The following figures use a symbol to represent the clock switch position on a PRI or T1 card. When the top of the symbol is black, it represents the switch in the Up or Enable position. When the bottom of the symbol is black, it represents the switch in the Down or Disable position. Figure C-3: Point-to-Point PRIs Figure C-4: TELCO PRI Connection to the Hub External Clock Setting:Hub Node Up = Enable Clock Down = Disable Clock (Clock Source) Hub Node Node TELCO PRI (Clock Source) External Clock Setting: Up = Enable Clock Down = Disable ClockNote: The horizontal arrow represents Out-to-In Cabling.
C-10Network Installation Appendix C - Networking Systems Figure C-5: No TELCO Connection Figure C-6: TELCO PRI Connection To a Node Hub Node Node (Clock Source) External Clock Setting: Up = Enable Clock Down = Disable Clock Hub Node Node TELCO PRI (Clock Source) External Clock Setting: Up = Enable Clock Down = Disable ClockNote: The horizontal arrow represents Out-to-In Cabling.
Network InstallationC-11 Appendix C - Networking Systems Figure C-7: All Systems have TELCO PRI Connection Figure C-8: All Systems have TELCO T1 Connection Hub Node Node TELCO PRI TELCO PRI TELCO PRI (Clock Source) External Clock Setting: Up = Enable Clock Down = Disable ClockNote: The horizontal arrow represents Out-to-In Cabling. Hub Node Node TELCO T1 TELCO T1 TELCO T1 (Clock Source) External Clock Setting: Up = Enable Clock Down = Disable ClockNote: The horizontal arrow represents Out-to-In Cabling.
C-12Network Installation Appendix C - Networking Systems Figure C-9: Two PRIs from TELCO to Nodes Figure C-10: Two T1s in Hub Connected to PRI in Nodes Hub Node Node TELCO PRI (Clock Source) External Clock Setting: Up = Enable Clock Down = Disable ClockNote: The horizontal arrow represents Out-to-In Cabling. Hub Node Node TELCO T1 (Clock Source) External Clock Setting: Up = Enable Clock Down = Disable ClockNote: The horizontal arrow represents Out-to-In Cabling.