faq


 
By Application
By Product
7501-15 (Plug-in DC Trip/DC Pilot Wire Card)
7501-72 (Plug-in Two-Wire AC Data Card)
751109/13 (Eight-Card Shelf)
751221 (Standalone Telephone Unit)
751321 (Plug-in Expandable Telephone Card)
751329 (Plug-in Four-Wire T1 Carrier Card)
751333A (Plug-in ISDN plus 56K Adtran Card)
751339 (Plug-in Four-Wire HDSL Card)
On Installation
» Can one use the 7501-72 card for either 4-wire data and/or T1? Which card, if any, can be used for 4-wire data or T1?

 

Can one use the 7501-72 card for either 4-wire data and/or T1? Which card, if any, can be used for 4-wire data or T1?
No, the frequency response, bandwidth and impedance are different between Data circuits and T1, therefore the 7501-72 card cannot handle a true T1 circuit. A 7501-24 is to be used for a 4-wire data circuit up to 64 kb. Above that, the 751339 HDSL card enters into the fray. If it is a true T1, then the T1 card 751329 should be used. The frequency response, bandwidth and impedance of the cards prohibit building one card that can accommodate a 96 kb circuit all the way up to a 1.544 Mb T1 circuit.

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