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The 1SA is an enhanced high-speed synchronous/asynchronous serial interface module. It can work in synchronous or asynchronous mode, and often uses the synchronous mode to connect to a WAN.
A 1SA card can be installed in a SIC slot of a router.
Card Name | Device Model |
|---|---|
1SA NOTE: This card is supported in V200R001C00 and later versions. | AR1200 series AR2200 series (All models in this series except the AR2201-48FE and AR2202-48FE) AR3200 series AR3600 series |
Function and Feature | Description |
|---|---|
Synchronous mode | Uses a synchronous serial interface to connect to a WAN. |
A synchronous serial interface can function as a DCE or DTE and supports multiple physical layer protocols, such as V.24, V.35, and X.21. It does not support the X.21 DCE mode. | |
The maximum rate of V.24 is 64 kbit/s, and the maximum rate of V.35 is 2.048 Mbit/s. | |
Supports link layer protocols PPP, FR, and HDLC. | |
Supports the IP protocol. | |
Asynchronous mode | An asynchronous serial interface supports the RS232 protocol and provides a maximum transmission rate of 115.2 kbit/s. |
An asynchronous serial interface works in protocol or flow mode. | |
Supports the PPP and IP protocols in protocol mode. | |
Does not support the PPP or IP protocol in flow mode. |
