artificial cable kit T240 Features • Plug-in Line Sections w/ Lattice Network and Ground Path • Plug-in Load Coils w/Switchable Faults • Precision Networks • Compromise Networks • Switches for Connecting a Bridged Tap • Capacity for a Line Using 56 Modules • Means for Connecting Single or Double Split Pairs • Five Simulated Bridged or Grounded Ringers • Unbalanced Series Resistance Decade • Build Out Capacitor • Carrying Case for Module Storage Description how many bridged ringers may be on a loop. Appropri- The Model T240 is an advanced concept in artificial ate precision and compromise networks are provided cable kit design providing line sections which closely for return loss and impedance measurements. All represent actual telephone cable sections, and includ- modules are enclosed in 2" X 2" X 3/4" aluminum cans ing facilities which simplify and expedite the analysis and equipped with rugged connectors for insertion and of fault conditions on a cable when used in conjunction receptacles on a plug-board panel. with the Wilcom T195 Level Tracer. Switches are included for introducing conditions which normally The basic package consists of a plugboard unit and would require the removal of modules from an artifi- cover. The plugboard is equipped with receptacles for cial line and then reassembling the line. mounting the plug-in line sections and load coil mod- ules. The accessory cover has a panel which provides New features make it possible to set up conditions for a variety of switchable conditions and a storage area for analyzing the effects of split pairs, unbalanced grounded patch cords. An optional plain cover is available which ringers, high series resistance unbalance, shunt capaci- provides storage for 96 plug-in modules. tance unbalance, bridged taps, and the effect of missing or improperly connected load coils, and to estimate Wilcom Plugboard Unit set up the proper connections. A rotary switch on the split pair function panel provides for The plugboard panel is mounted in a case 20" L X 10" normal operation of the two lines, a single split W X 2 3/4" D. It contains 56 receptacles which accept pair, or a double split pair. plug-in modules comprising line sections, load coils, terminations, binding post assemblies, and cables for 2. Series Resistance connecting to special functions. Switches are included A variable resistance decade which provides to provide means for setting up a variety of simulated resistances up to 9999 ohms in 1 ohm steps, and cable configurations and fault conditions. All recep- means for inserting this resistance in series tacles and switches are mounted on printed circuit board with either the tip or ring side of the line are assemblies to minimize distributed capacity of wiring included. It is possible to insert this series and to assure uniformity in production assembly. Among resistance at any point along the length of the the more common arrangements that can be set up are artificial line. The resistance is also available the following: across a pair of binding posts for use in other applications. The maximum current which may 1. All 56 modules can be connected to produce flow in each resistance decade is: one long line. If a loaded line is to be set up in a conventional configuration H88 loading, 1 ohm steps 500 mA maximum number of load coils that could be set 10 ohm steps 150 mA up would be 26. This arrangement would also 100 ohm steps 50 mA include two binding post modules and two 3000 1000 ohm steps 15 mA ft. end sections as well as 6000 ft. line sections. 3. Build Out Capacitor 2. Two lines of 20 modules each, which could A variable capacitor decade which provides include two binding post modules, two 3000 ft. capacitances from 0 to .999 µF in .001 µF steps end sections eight load coils, and seven 6000 ft. and a connector for a precision network are sections for H88 loading. In addition, a bridged included. The voltage rating in 150 V DC. tap of up to eight modules could be set up for When the network is not used, the capacitance each line. Switches are provided for connect- is available across a pair of binding posts and is ing the bridged tap at any point on each line. useful in demonstrating the effect of shunt capacitance unbalance. 3. One line of up to forty modules can be set up and two bridged taps can be switched in at any two 4. Ringer Simulator points on the line, depending on how the line is An arrangement for connecting up to five simu- arranged. lated ringers across the tip and ring on a bridged basis, or for connecting ringers to ground in any A variety of other line configurations can be arranged by combination adding up to five is provided. This using the appropriate modules, patch cords, and switches. feature makes it possible to determine if an equal number of ringers are connected from tip Accessory Cover and ring to ground on party lines, or to deter- mine the number of ringers bridged across the The accessory cover, which is standard equipment, line, when the T240 is used in combination with provides cord storage space and includes four features the T195 Level Tracer. which facilitate the analysis of a variety of conditions on a telephone cable. The cover mates to the plugboard Line Section Modules unit, and its dimensions are 20" L X 10" W X 4 1/4" D. The four features included are: Each line section includes a lattice network, a ground path, capacitors to ground to closely simulate the char- 1. Split Pair Function acteristics of a section of telephone cable. All compo- Connections and switching for setting up two nent values have tight tolerances to assure good balance lines with single or double split pairs are pro- to ground and uniformity in production. The rating of vided. If the effect of split pairs on loaded cable series elements is such that each section can safely carry are to be observed, two lines with a maximum a current of 150 mA. All elements are mounted on a of 12 load coils each can be set up on the printed circuit board which is firmly attached to a Plugboard Unit.. A set of cables are included to connector used for insertion in the receptacles on the Plugboard Unit. Each line section will have a label attached to the top of Other values of inductance are made available upon the module indicating the length and gauge of the line request. section. All modules are aluminum cases 2" L X 2" W X 3/4" D and are anodized with the following color Network Modules code: 19 Gauge — GRAY Two types of network modules are available. These are 22 Gauge — RED also assembled with the same construction as the line 24 Gauge — GREEN section modules. 26 Gauge — BLUE 1. Precision Networks Line sections are available in these lengths; 50, 100, Precision Networks similar to the Western Elec- 250, 500, 750, 1000, 1500, 2250, 3000, 4500, 6000 feet. tric Type 4066 are available for each line sec- Line sections simulate a cable with a capacitance of tion gauge and loading scheme. Build-out .083 µF per mile. capacitors are not included in the network module as they are available in the T195 Level Tracer and the T240 Accessory Cover. 2. Compromise Network A compromise network is available to connect either 600 or 900 ohms in series with a 2.16 µF capacitor across a line. A toggle switch is mounted on the top of the module for selecting with 600 or 900 ohms. Binding Post Modules Each module consists of three binding posts and a connector for insertion in the receptacles on the Plug- board Unit. Two binding posts colored red are used for connecting to the tip and ring leads of a line. The third Load Coil Modules binding posts colored black, is used for connecting to the ground path of the line sections. Load Coils are mounted in a module assembly similar to that of the Line Sections. A three position toggle Patch Cords switch is mounted on the top of the can to provide the following arrangements: Four patch cords are available to facilitate connections to test equipment and various functions in the accessory 1. Load Coil connected normally. cover and for interconnecting special arrangements on 2. Load Coil with only one side connected, the Plugboard Unit. They are: to show the effect of connecting only one half of the coil. Type Description 3. Load Coil missing. 2BA-60 5 ft. long with twin banana plugs at each end. This arrangement eliminates the need for physically 2BA-AL-605 ft. long removing a load coil from the line to note the effect of with twin banana plugs at one end a missing or improperly connected coil. Consequently, and two alligator clips at the other end. tests for missing coils are greatly accelerated and sim- B 36 Red 3 ft. long single conductor plified. and banana plug at each end. B 36 Black 3 ft. long single conductor Three load coils are available with color coding for easy and banana plug at each end. identification: Module Carrying Case Inductance Color 44 mH Green A carrying case which can store 192 modules is avail- 66 mH Gray 88 mH Red able. It is sectionalized for the protection of individual Specifications and Ordering Information modules and housed in an aluminum case and cover OTHER MODULES 20" L X 10" W X 8" D. Type Description CN-1 Compromise Network (switchable 600 or 900) All units which combine to make a complete artificial cable kit can BPM-3 Binding Post Module (with 3 Binding Posts) be ordered individually as required or in suggested kits which result in some cost saving. CORD SET Individual items can be ordered with the following part SPC-6 Set of 6 cords for connections between accessory numbers: cover and plugboard unit. PLUGBOARDS & COVERS (without plug-in modules) CARRYING CASE for Storing Modules Model Description T240MCC Module Carrying Case T240PC Plugboard unit with plain cover Capacity for 192 modules T240PAC Plugboard unit with accessory cover T240CAC Accessory cover when ordered separately PATCH CORDS PLUG-IN MODULES Optional and should be ordered with the designations listed in the section on cords. Line Sections Available Gauges: 19, 22, 24, and 26 SUGGESTED KITS Available Lengths: 50 ft. 750 ft. Kit # K240AC K240B K240C K240D 3000 ft. Line Section 100 1000 4500 Module Gauge 22 24 26 19 250 1500 6000 500 2250 Length/ft. Quantity Quantity Quantity Quantity Note: 50 ft. and 100 ft. lengths are not available for 19 gauge. When 50 3 6 6 — ordering line sections, each section is to be designated by a type 100 3 6 6 — number which includes the prefix LS followed by the gauge and 250 3 6 6 2 length, as shown in the following examples: 500 6 6 6 3 750 6 6 6 3 Type Description 1000 6 6 6 6 LS 19-500 Line Section, 19 gauge, 500 ft. 1500 6 6 6 6 LS 22-3000 Line Section, 22 gauge, 3000 ft. 2250 4 4 4 4 LS 24-4500 Line Section, 24 gauge, 4500 ft. 3000 8 6 6 8 4500 2 2 2 2 PRECISION NETWORKS 6000 10 8 8 10 Precision Net • Available Gauges: 19, 22, 24, and 26 (specify type) 2 2 2 2 • Available Loading Arrangements: H88, D66 Load Coils When ordering precision networks, each network is to be desig- (specify type) 16 nated by a type number which includes the prefix PN followed by Binding Post the gauge and loading arrangement, as shown in the following Modules 6 examples: Compromise Net 2 SPC 6 cords - Type Description set of 6 1 PN 19-88 Precision Network, 19 gauge, H88 loading T240 PAC PN 22-88 Precision Network, 22 gauge, H88 loading unit & cover 1 PN 22-66 Precision Network, 22 gauge, D66 loading The above kit arrangement assumes that a 22-gauge kit would LOAD COILS be a basic kit and that the others would be added as required. However, if a basic kit of another gauge is preferred, add the Type Description suffix C to the kit number. This would add the rest of the items LC 44 44 mH load coil listed below the Precision Net. If a kit of only the 22-gauge line LC 66 66 mH load coil sections and precision nets is required, delete the suffix C and LC 88 88 mH load coil order the K240A kit. Wilcom Specifications and prices are subject to change without notice. P.O. Box 508, Laconia, NH 03247 08/06 811-836-002 ISO - 9001:2000 Registered Tel: 603/524-2622 • 800/222-1898 • Fax: 603/524-3735 Web Site: www.wilcominc.com