Cisco Systems C819GUK9 Legacy Protocol Transport, Configuring Serial Interfaces, Product Number

Chapter 8 Configuring the Serial Interface

Legacy Protocol Transport

Legacy Protocol Transport

Serial and synchronous/asynchronous ports are ideally suited to transport legacy traffic across a TCP/IP network, facilitating network convergence. Legacy protocols supported by Cisco IOSR Software include:

•Synchronous Data Link Control (SDLC) Protocol

•Binary Synchronous Communications Protocol (Bisync)

•X.25 Protocol

Figure 8-2 Network Convergence

The Cisco 819 ISRs use Cisco Smart Serial connectors. The supported cables are noted in Table 8-1.

Table 8-1	Smart Serial Cabling for Cisco 819 ISRs
Product Number		Cable Type	Length	Connector Type
CAB-SS-V35MT		V.35 DTE	10 ft (3m)	Male
CAB-SS-V35FC 10 ft (3m) Female		V.35 DCE	10 ft (3m)	Female
CAB-SS-232MT		EIA/TIA-232 DTE	10 ft (3m)	Male
CAB-SS-232FC		EIA/TIA-232 DTE	10 ft (3m)	Female
CAB-SS-449MT		EIA/TIA-449 DTE	10 ft (3m)	Male
CAB-SS-449FC		EIA/TIA-449 DTE	10 ft (3m)	Female
CAB-SS-X21MT		X.21 DTE	10 ft (3m)	Male
CAB-SS-X21FC		X.21 DTE	10 ft (3m)	Female
CAB-SS-530MT		EIA/TIA-530 DTE	10 ft (3m)	Male
CAB-SS-530AMT		EIA/TIA-232 DTE	10 ft (3m)	Male

Configuring Serial Interfaces

When the router receives an indication that the primary interface is down, the backup interface becomes enabled. After the primary connection has been restored for a specified period, the backup interface is disabled.

Even if the backup interface comes out of standby mode, the router does not enable the backup interface unless the router receives the traffic specified for that backup interface.

Cisco 819 Series Integrated Services Routers Software Configuration Guide

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