Customer Reviews
  1. About Us
  2. Contact Us
  3. Find an Installer
  4. Sell Us Your Equipment
  5. Questions?  Call us today.  800-929-8061


The Phone System Roadmap
TN Form Factor Circuit Packs (G650, CMC1)
TN1650B Memory
TN1654 DS1 Converter
TN2181 - TN2793B
TN2181 16-Port Digital Circuit Pack
TN2182 Tone Clock
TN2182B Tone Clock
TN2182C Tone-Clock, Tone Detector, and Call Classifier
TN2224B 2-Wire Digital 24-Port Circuit Pack
TN2224CP 24-Port Digital Circuit Pack
TN2302AP IP Media Processor (700394604)
TN2312AP IP Server Interface (700060643)
TN2312BP IP Server Interface (700394679)
TN2313AP DS1 Interface
TN2464 DS1 Interface
TN2464CP DS1 Interface Circuit Pack
TN2501AP Voice Announcements over LAN (VAL)
TN2602AP IP Media Resource 320 (700261928, 203071)
TN2793 24-Port Analog Circuit Pack
TN2793B 24-Port Analog Circuit Pack
TN420D - TN744E
TN429D DIOD (Direct Inward Outward Dialing)
TN464D Universal DS1/ISDN Circuit Pack
TN464F Universal DS1 ISDN PRI Interface
TN464GP Universal DS1/PRI Interface (108826884)
TN570B Expansion Interface
TN570D Expansion Interface
TN744D Call Classifier
TN746B - TN767E
TN747B 8-Port Central Office Trunk Circuit Card
TN748C Tone Detector
TN748D Tone Detector
TN750C Announcement Circuit Pack
TN754B 4-Wire DCP Digital Line Circuit Pack
TN754C 4-Wire DCP Digital Line Circuit Pack
TN756 Tone Detector
TN760C Tie Trunk
TN763D Auxiliary Trunk
TN767E DS1 / ISDN PRI Interface Circuit Pack
TN771 - TN1654
TN771DP Maintenance and Test
TN772 Duplication Interface
TN775D EPN Maintenance Board
TN776 Expansion Interface (for R6 or earlier si)
TN777B Network Controller (R6 and earlier)
TN778 Packet Control (R6 and earlier)
TN791 16-Port Analog Guest Line Circuit Pack
TN792 Duplication Interface
TN793B 24-Port Analog Circuit Pack

Prev   |   Next