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Installing and Operating BayStack ARN Routers
ISDN BRI U Interface
The ARN supports the BRI standard for ISDN using an optional ISDN/BRI adapter module. The integrated ISDN BRI functionality allows you to connect directly to the ISDN network, through a U interface, as opposed to connecting over a terminal adapter. This solution reduces equipment costs and simplifies connection to an ISDN switch.
The BRI implementation supports two dial service applications:
Table
Table C-8. ISDN BRI U Interface Pin Assignments
Pin Assignment | Pin No. | Signal | ||||||||||||||||||||
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| 1 | Not used |
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1 23 45 6 78 |
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| 2 | Not used | ||||||||||||||||||
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| 3 | Tx+ (Transmit to wire) |
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| 4 | Rx+ (Receive from wire) |
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| 5 | Rx- (Receive from wire) |
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| 6 | Tx- (Transmit to wire) |
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| 7 | Not used |
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| 8 | Not used |
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114200 Rev. A |