TN791 Analog Guest Line Circuit Pack
The TN791 has 16-ports. Each port supports 1 voice terminal, such as 500 (rotary dial) and 2500 terminals (DTMF dial) LED and neon message waiting indicators are supported (a separate power supply is required for neon message waiting indicators).
It supports on-premises wiring with either touch-tone or rotary dialing and with or without the LED and neon message waiting indicators. It has the ability to support 3 ringer loads, but only 1 voice terminal can have an LED or neon message waiting indicator.
The circuit pack allows for a maximum of 8 simultaneous ports ringing and is compatible with
500-type, 2500-type, 6200-type, 7100, 7101A, 7103A, 8100, and 9100 series terminals.
International offers or US and Canada Category B only.
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03-30-25
C.Pitts Verified Customer 03-26-25
We were in search of phones that had been discontinued for quite some time, and I am delighted to have discovered this website. The entire process-from placing the order to receiving the devices-was seamless and highly efficient. The website is clean, user-friendly, and easy to navigate, which made browsing and purchasing straightforward. After placing the order, the phones arrived within the promised time frame and were in excellent condition. The company provided timely updates regarding the status of my order without overwhelming me with unnecessary promotional messages. This level of communication was both reassuring and professional. I highly recommend this company/website, especially for those seeking older, discontinued devices.
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{"id":331081154590,"title":"Avaya Definity TN775D EPN Maintenance Board","handle":"tn775d-epn-maintenance-board-tn775d","description":"\u003ch2\u003eTN775D EPN Maintenance Board\u003c\/h2\u003e \u003cp\u003eThe TN775D EPN Maintenance Board will provide users the ability to monitor multiple features for the EPN cabinet in R7si\/r or later.\u003c\/p\u003e \u003ch3\u003eFeatures\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eMonitors power failure signals in EPN cabinets\u003c\/li\u003e \u003cli\u003eMonitors clock\u003c\/li\u003e \u003cli\u003eMonitors and controls battery charger and power supplies\u003c\/li\u003e \u003cli\u003eMonitors air flow and temperature sensors\u003c\/li\u003e \u003cli\u003eTwo serial links for communication for the Expansion Interface (EI) circuit packs, also provides an RS-232 interface for connection with an administration terminal\u003c\/li\u003e \u003cli\u003e3-position switch to control emergency power transfer\u003c\/li\u003e \u003cli\u003eEquipped with a new DC to DC power converter\u003c\/li\u003e \u003cli\u003eOne Year Warranty Included with Extended Warranty Options at Low Prices!\u003c\/li\u003e \u003c\/ul\u003e","published_at":"2017-11-15T09:15:01-05:00","created_at":"2017-11-15T09:15:02-05:00","vendor":"Avaya","type":"Avaya\/Definity Circuit Packs TN771 - TN802","tags":[],"price":3998,"price_min":3998,"price_max":3998,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":31324030009424,"title":"Like New","option1":"Like New","option2":null,"option3":null,"sku":"Definity-TN775D-R","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Avaya Definity TN775D EPN Maintenance Board - Like New","public_title":"Like New","options":["Like New"],"price":3998,"weight":907,"compare_at_price":null,"inventory_quantity":1,"inventory_management":null,"inventory_policy":"deny","barcode":null,"requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/www.atlasphones.com\/cdn\/shop\/products\/1281596719134.jpg?v=1604692072","\/\/www.atlasphones.com\/cdn\/shop\/products\/1281596751902.jpg?v=1604692072","\/\/www.atlasphones.com\/cdn\/shop\/products\/1281596784670.jpg?v=1604692072","\/\/www.atlasphones.com\/cdn\/shop\/products\/1281596817438.jpg?v=1604692072"],"featured_image":"\/\/www.atlasphones.com\/cdn\/shop\/products\/1281596719134.jpg?v=1604692072","options":["Choose Condition"],"media":[{"alt":"TN775D EPN Maintenance Board Side Angle","id":1961215131728,"position":1,"preview_image":{"aspect_ratio":1.0,"height":800,"width":800,"src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/1281596719134.jpg?v=1604692072"},"aspect_ratio":1.0,"height":800,"media_type":"image","src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/1281596719134.jpg?v=1604692072","width":800},{"alt":"TN775D EPN Maintenance Board Front Angle","id":1961215164496,"position":2,"preview_image":{"aspect_ratio":1.0,"height":800,"width":800,"src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/1281596751902.jpg?v=1604692072"},"aspect_ratio":1.0,"height":800,"media_type":"image","src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/1281596751902.jpg?v=1604692072","width":800},{"alt":"TN775D EPN Maintenance Board Back Angle","id":1961215197264,"position":3,"preview_image":{"aspect_ratio":1.0,"height":800,"width":800,"src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/1281596784670.jpg?v=1604692072"},"aspect_ratio":1.0,"height":800,"media_type":"image","src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/1281596784670.jpg?v=1604692072","width":800},{"alt":"TN775D EPN Maintenance Board Top View","id":1961215230032,"position":4,"preview_image":{"aspect_ratio":1.0,"height":800,"width":800,"src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/1281596817438.jpg?v=1604692072"},"aspect_ratio":1.0,"height":800,"media_type":"image","src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/1281596817438.jpg?v=1604692072","width":800}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003ch2\u003eTN775D EPN Maintenance Board\u003c\/h2\u003e \u003cp\u003eThe TN775D EPN Maintenance Board will provide users the ability to monitor multiple features for the EPN cabinet in R7si\/r or later.\u003c\/p\u003e \u003ch3\u003eFeatures\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eMonitors power failure signals in EPN cabinets\u003c\/li\u003e \u003cli\u003eMonitors clock\u003c\/li\u003e \u003cli\u003eMonitors and controls battery charger and power supplies\u003c\/li\u003e \u003cli\u003eMonitors air flow and temperature sensors\u003c\/li\u003e \u003cli\u003eTwo serial links for communication for the Expansion Interface (EI) circuit packs, also provides an RS-232 interface for connection with an administration terminal\u003c\/li\u003e \u003cli\u003e3-position switch to control emergency power transfer\u003c\/li\u003e \u003cli\u003eEquipped with a new DC to DC power converter\u003c\/li\u003e \u003cli\u003eOne Year Warranty Included with Extended Warranty Options at Low Prices!\u003c\/li\u003e \u003c\/ul\u003e"}
$65.00
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{"id":331081351198,"title":"Avaya Definity TN777 Network Controller Circuit Pack","handle":"tn777-network-controller-tn777","description":"\u003ch2\u003eTN777 Network Controller\u003c\/h2\u003e\n\u003cp\u003eThe TN777 Network Controller delivers control channel messages between distributed networks of port circuit packs on the TDM bus and processor circuit pack. Information is routed between 4 data channels directly from the processor circuit pack to the customer connected equipment.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCommunicates control messages between processor circuit pack and distributed network of port circuit packs on the TDM bus\u003c\/li\u003e\n\u003cli\u003eControls four data channels\u003c\/li\u003e\n\u003cli\u003eTime of date clock with battery backup for power failure and low voltage conditions\u003c\/li\u003e\n\u003cli\u003eMonitors status of system clocks\u003c\/li\u003e\n\u003cli\u003esupports ISDN Replaced by TN794 Network Control\/Packet interface for R7 and R8\u003c\/li\u003e\n\u003cli\u003eReplaced by TN2401 Network Control\/Packet interface for R9 and R10\u003c\/li\u003e\n\u003cli\u003eIncludes\u003cspan style=\"color: #6aa84f;\"\u003e\u003ca href=\"https:\/\/www.atlasphones.com\/pages\/warranty-policy\" target=\"_blank\" style=\"color: #85bc04;\" rel=\"noopener noreferrer\"\u003e Atlas 1-Year Warranty\u003c\/a\u003e\u003c\/span\u003e with Extended Warranty options available!\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\n\u003ch3\u003ePackage Includes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTN777 Network Controller Card\u003c\/li\u003e\n\u003c\/ul\u003e","published_at":"2017-11-15T09:15:15-05:00","created_at":"2017-11-15T09:15:15-05:00","vendor":"Avaya","type":"Avaya\/Definity Circuit Packs TN771 - TN802","tags":[],"price":6500,"price_min":6500,"price_max":6500,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":31324029517904,"title":"Like New","option1":"Like New","option2":null,"option3":null,"sku":"Definity-TN777-R","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Avaya Definity TN777 Network Controller Circuit Pack - Like New","public_title":"Like New","options":["Like New"],"price":6500,"weight":907,"compare_at_price":null,"inventory_quantity":1,"inventory_management":null,"inventory_policy":"deny","barcode":null,"requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/www.atlasphones.com\/cdn\/shop\/products\/1_6eb7ca67-95db-4942-89c1-3c758179037d.jpg?v=1647638196"],"featured_image":"\/\/www.atlasphones.com\/cdn\/shop\/products\/1_6eb7ca67-95db-4942-89c1-3c758179037d.jpg?v=1647638196","options":["Choose Condition"],"media":[{"alt":"Avaya Definity TN777 Network Controller Circuit Pack Top View","id":22041067552848,"position":1,"preview_image":{"aspect_ratio":1.0,"height":800,"width":800,"src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/1_6eb7ca67-95db-4942-89c1-3c758179037d.jpg?v=1647638196"},"aspect_ratio":1.0,"height":800,"media_type":"image","src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/1_6eb7ca67-95db-4942-89c1-3c758179037d.jpg?v=1647638196","width":800}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003ch2\u003eTN777 Network Controller\u003c\/h2\u003e\n\u003cp\u003eThe TN777 Network Controller delivers control channel messages between distributed networks of port circuit packs on the TDM bus and processor circuit pack. Information is routed between 4 data channels directly from the processor circuit pack to the customer connected equipment.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCommunicates control messages between processor circuit pack and distributed network of port circuit packs on the TDM bus\u003c\/li\u003e\n\u003cli\u003eControls four data channels\u003c\/li\u003e\n\u003cli\u003eTime of date clock with battery backup for power failure and low voltage conditions\u003c\/li\u003e\n\u003cli\u003eMonitors status of system clocks\u003c\/li\u003e\n\u003cli\u003esupports ISDN Replaced by TN794 Network Control\/Packet interface for R7 and R8\u003c\/li\u003e\n\u003cli\u003eReplaced by TN2401 Network Control\/Packet interface for R9 and R10\u003c\/li\u003e\n\u003cli\u003eIncludes\u003cspan style=\"color: #6aa84f;\"\u003e\u003ca href=\"https:\/\/www.atlasphones.com\/pages\/warranty-policy\" target=\"_blank\" style=\"color: #85bc04;\" rel=\"noopener noreferrer\"\u003e Atlas 1-Year Warranty\u003c\/a\u003e\u003c\/span\u003e with Extended Warranty options available!\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\n\u003ch3\u003ePackage Includes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTN777 Network Controller Card\u003c\/li\u003e\n\u003c\/ul\u003e"}
$38.99
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{"id":331081613342,"title":"Avaya Definity TN777B Network Controller Circuit Pack","handle":"tn777b-network-controller-tn777b","description":"\u003ch2\u003eTN777B Network Controller\u003c\/h2\u003e \u003cp\u003eThe TN777B Network Controller is designed to deliver control channel messages between distributed networks of port circuit packs on the TDM bus and processor circuit pack. Information is routed between 4 data channels directly from the processor circuit pack to the customer connected equipment.\u003c\/p\u003e \u003ch3\u003eFeatures\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eCommunicates control messages between processor circuit pack and distributed network of port circuit packs on the TDM bus\u003c\/li\u003e \u003cli\u003eControls four data channels\u003c\/li\u003e \u003cli\u003eTime of date clock with battery backup for power failure and low voltage conditions\u003c\/li\u003e \u003cli\u003eMonitors status of system clocks\u003c\/li\u003e \u003cli\u003esupports ISDN Replaced by TN794 Network Control\/Packet interface for R7 and R8\u003c\/li\u003e \u003cli\u003eReplaced by TN2401 Network Control\/Packet interface for R9 and R10\u003c\/li\u003e \u003cli\u003eOne Year Warranty Included with Extended Warranty Options at Low Prices!\u003c\/li\u003e \u003c\/ul\u003e \u003cbr\u003e \u003ch3\u003ePackage Includes\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eTN777B Network Controller Card\u003c\/li\u003e \u003c\/ul\u003e","published_at":"2017-11-15T09:15:26-05:00","created_at":"2017-11-15T09:15:27-05:00","vendor":"Avaya","type":"Avaya\/Definity Circuit Packs TN771 - TN802","tags":[],"price":3899,"price_min":3899,"price_max":3899,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":31324028403792,"title":"Like New","option1":"Like New","option2":null,"option3":null,"sku":"Definity-TN777B-R","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Avaya Definity TN777B Network Controller Circuit Pack - Like New","public_title":"Like New","options":["Like New"],"price":3899,"weight":907,"compare_at_price":null,"inventory_quantity":-1,"inventory_management":null,"inventory_policy":"deny","barcode":null,"requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/www.atlasphones.com\/cdn\/shop\/products\/1281599242270.jpg?v=1612298441","\/\/www.atlasphones.com\/cdn\/shop\/products\/1281599209502.jpg?v=1612298441","\/\/www.atlasphones.com\/cdn\/shop\/products\/1281599275038.jpg?v=1604692071","\/\/www.atlasphones.com\/cdn\/shop\/products\/1281599307806.jpg?v=1604692071","\/\/www.atlasphones.com\/cdn\/shop\/products\/1281599340574.jpg?v=1604692071"],"featured_image":"\/\/www.atlasphones.com\/cdn\/shop\/products\/1281599242270.jpg?v=1612298441","options":["Choose Condition"],"media":[{"alt":"TN777B Network Controller Side Angle","id":1961252880464,"position":1,"preview_image":{"aspect_ratio":1.0,"height":800,"width":800,"src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/1281599242270.jpg?v=1612298441"},"aspect_ratio":1.0,"height":800,"media_type":"image","src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/1281599242270.jpg?v=1612298441","width":800},{"alt":"TN777B Network Controller Sideways Angle","id":1961252847696,"position":2,"preview_image":{"aspect_ratio":1.0,"height":800,"width":800,"src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/1281599209502.jpg?v=1612298441"},"aspect_ratio":1.0,"height":800,"media_type":"image","src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/1281599209502.jpg?v=1612298441","width":800},{"alt":"TN777B Network Controller Front Angle","id":1961252913232,"position":3,"preview_image":{"aspect_ratio":1.0,"height":800,"width":800,"src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/1281599275038.jpg?v=1604692071"},"aspect_ratio":1.0,"height":800,"media_type":"image","src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/1281599275038.jpg?v=1604692071","width":800},{"alt":"TN777B Network Controller Back Angle","id":1961252946000,"position":4,"preview_image":{"aspect_ratio":1.0,"height":800,"width":800,"src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/1281599307806.jpg?v=1604692071"},"aspect_ratio":1.0,"height":800,"media_type":"image","src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/1281599307806.jpg?v=1604692071","width":800},{"alt":"TN777B Network Controller Top View","id":1961252978768,"position":5,"preview_image":{"aspect_ratio":1.0,"height":800,"width":800,"src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/1281599340574.jpg?v=1604692071"},"aspect_ratio":1.0,"height":800,"media_type":"image","src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/1281599340574.jpg?v=1604692071","width":800}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003ch2\u003eTN777B Network Controller\u003c\/h2\u003e \u003cp\u003eThe TN777B Network Controller is designed to deliver control channel messages between distributed networks of port circuit packs on the TDM bus and processor circuit pack. Information is routed between 4 data channels directly from the processor circuit pack to the customer connected equipment.\u003c\/p\u003e \u003ch3\u003eFeatures\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eCommunicates control messages between processor circuit pack and distributed network of port circuit packs on the TDM bus\u003c\/li\u003e \u003cli\u003eControls four data channels\u003c\/li\u003e \u003cli\u003eTime of date clock with battery backup for power failure and low voltage conditions\u003c\/li\u003e \u003cli\u003eMonitors status of system clocks\u003c\/li\u003e \u003cli\u003esupports ISDN Replaced by TN794 Network Control\/Packet interface for R7 and R8\u003c\/li\u003e \u003cli\u003eReplaced by TN2401 Network Control\/Packet interface for R9 and R10\u003c\/li\u003e \u003cli\u003eOne Year Warranty Included with Extended Warranty Options at Low Prices!\u003c\/li\u003e \u003c\/ul\u003e \u003cbr\u003e \u003ch3\u003ePackage Includes\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eTN777B Network Controller Card\u003c\/li\u003e \u003c\/ul\u003e"}
$68.99
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{"id":331082039326,"title":"Avaya Definity TN778 Packet Control Circuit Pack","handle":"tn778-packet-control","description":"\u003ch2\u003eTN778 Packet Control\u003c\/h2\u003e\n\u003cp\u003eThe TN778 interfaces the packet bus with SPE and terminates LAPD links. This Packet Control supports packet bus signaling on the ISDN D-channel for ASAI applications. The TN778 is also equipped with the protocol to process SPE with the pack bus. This model is replaced by the TN794 Network Control\/Packet Interface.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInterfaces packet bus with the SPE\u003c\/li\u003e\n\u003cli\u003eSupports packet bus signaling for ISDN-D-channel\u003c\/li\u003e\n\u003cli\u003eProvides protocol processing capability\u003c\/li\u003e\n\u003cli\u003eReplaced by TB794 Control\/Packet Interface\u003c\/li\u003e\n\u003cli\u003eIncludes\u003cspan style=\"color: #6aa84f;\"\u003e\u003ca href=\"https:\/\/www.atlasphones.com\/pages\/warranty-policy\" target=\"_blank\" style=\"color: #85bc04;\" rel=\"noopener noreferrer\"\u003e Atlas 1-Year Warranty\u003c\/a\u003e\u003c\/span\u003e with Extended Warranty options available!\u003c\/li\u003e\n\u003c\/ul\u003e","published_at":"2017-11-15T09:15:54-05:00","created_at":"2017-11-15T09:15:54-05:00","vendor":"Avaya","type":"Avaya\/Definity Circuit Packs TN771 - TN802","tags":[],"price":6899,"price_min":6899,"price_max":6899,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":31324028305488,"title":"Like New","option1":"Like New","option2":null,"option3":null,"sku":"Definity-TN778-R","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Avaya Definity TN778 Packet Control Circuit Pack - Like New","public_title":"Like New","options":["Like New"],"price":6899,"weight":907,"compare_at_price":null,"inventory_quantity":-1,"inventory_management":null,"inventory_policy":"deny","barcode":null,"requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/www.atlasphones.com\/cdn\/shop\/products\/3_4718573f-d033-4b65-bb97-a467901befd2.jpg?v=1649347468","\/\/www.atlasphones.com\/cdn\/shop\/products\/1_a5793075-bd04-4118-aa51-2c7070036f88.jpg?v=1649347468","\/\/www.atlasphones.com\/cdn\/shop\/products\/2_8cce17fb-7a62-46d8-9b12-4e1967a88e68.jpg?v=1649347468","\/\/www.atlasphones.com\/cdn\/shop\/products\/4_b3cb096e-66ca-4da1-b219-4bf566f04094.jpg?v=1649347468"],"featured_image":"\/\/www.atlasphones.com\/cdn\/shop\/products\/3_4718573f-d033-4b65-bb97-a467901befd2.jpg?v=1649347468","options":["Choose Condition"],"media":[{"alt":"Avaya Definity TN778 Packet Control Circuit Pack Front Angle","id":22135938809936,"position":1,"preview_image":{"aspect_ratio":1.0,"height":800,"width":800,"src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/3_4718573f-d033-4b65-bb97-a467901befd2.jpg?v=1649347468"},"aspect_ratio":1.0,"height":800,"media_type":"image","src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/3_4718573f-d033-4b65-bb97-a467901befd2.jpg?v=1649347468","width":800},{"alt":"Avaya Definity TN778 Packet Control Circuit Pack Right Side Angle","id":22135938875472,"position":2,"preview_image":{"aspect_ratio":1.0,"height":800,"width":800,"src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/1_a5793075-bd04-4118-aa51-2c7070036f88.jpg?v=1649347468"},"aspect_ratio":1.0,"height":800,"media_type":"image","src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/1_a5793075-bd04-4118-aa51-2c7070036f88.jpg?v=1649347468","width":800},{"alt":"Avaya Definity TN778 Packet Control Circuit Pack Side Angle","id":22135938842704,"position":3,"preview_image":{"aspect_ratio":1.0,"height":800,"width":800,"src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/2_8cce17fb-7a62-46d8-9b12-4e1967a88e68.jpg?v=1649347468"},"aspect_ratio":1.0,"height":800,"media_type":"image","src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/2_8cce17fb-7a62-46d8-9b12-4e1967a88e68.jpg?v=1649347468","width":800},{"alt":"Avaya Definity TN778 Packet Control Circuit Pack Back Angle","id":22135938777168,"position":4,"preview_image":{"aspect_ratio":1.0,"height":800,"width":800,"src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/4_b3cb096e-66ca-4da1-b219-4bf566f04094.jpg?v=1649347468"},"aspect_ratio":1.0,"height":800,"media_type":"image","src":"\/\/www.atlasphones.com\/cdn\/shop\/products\/4_b3cb096e-66ca-4da1-b219-4bf566f04094.jpg?v=1649347468","width":800}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003ch2\u003eTN778 Packet Control\u003c\/h2\u003e\n\u003cp\u003eThe TN778 interfaces the packet bus with SPE and terminates LAPD links. This Packet Control supports packet bus signaling on the ISDN D-channel for ASAI applications. The TN778 is also equipped with the protocol to process SPE with the pack bus. This model is replaced by the TN794 Network Control\/Packet Interface.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInterfaces packet bus with the SPE\u003c\/li\u003e\n\u003cli\u003eSupports packet bus signaling for ISDN-D-channel\u003c\/li\u003e\n\u003cli\u003eProvides protocol processing capability\u003c\/li\u003e\n\u003cli\u003eReplaced by TB794 Control\/Packet Interface\u003c\/li\u003e\n\u003cli\u003eIncludes\u003cspan style=\"color: #6aa84f;\"\u003e\u003ca href=\"https:\/\/www.atlasphones.com\/pages\/warranty-policy\" target=\"_blank\" style=\"color: #85bc04;\" rel=\"noopener noreferrer\"\u003e Atlas 1-Year Warranty\u003c\/a\u003e\u003c\/span\u003e with Extended Warranty options available!\u003c\/li\u003e\n\u003c\/ul\u003e"}
