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| ARN Technical Specifications |
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Table | Network Interfaces Available on ARNs (continued) | |
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Network |
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Interface |
| Description |
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Serial |
| Provides WAN connectivity. ARN models can have up to five serial ports (three on an |
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| expansion module and up to two adapter modules). |
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| Each port can operate independently with |
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| V.35, and X.21 cables. Serial capability allows internal or external clocking. |
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ISDN BRI |
| Supports an S/T or U interface. The BRI provides two B channels, and supports full |
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| Q.921 and Q.931. For more information on ISDN, functional groups, or reference |
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| points, refer to Configuring Dial Services. |
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| The ISDN BRI option is available as an adapter module for any ARN model. |
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56/64K DSU/CSU | Supports a 56/64K DSU/CSU interface. | |
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FT1/T1 and |
| Provides an interface to convert incoming packet data from an external T1 or E1 line |
FE1/E1 DSU/CSU | (using an | |
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| Unit (CSU) function on each T1 or E1 port, it allows direct connection to the network. A |
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| T1 port can transmit or receive a total of 24 DSO HDLC channels for each DS1 frame. |
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X.25 PAD |
| Provides an X.25 PAD interface. |
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V.34 Modem |
| Provides a V.34 modem interface. |
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Note: For the proper cables or cable pinouts to use for each interface type, see the Cable Guide.