Huawei v200r001 Typical Configuration of Modem Management, Managing Modem with Modem Script

User Manual - Configuration Guide (Volume 3)		Chapter 2
Versatile Routing Platform		Configuration of Modem Management
Table DC-2-7Configure modem answer mode
	Operation	Command
	MODEM is in automatic answer mode	modem-autoanswer
	MODEM is I nnon-automatic answer mode	no modem-autoanswer

By default, modem is in non-automatic answer mode.

The configuration mainly depends on whether the status of the external modem of the asynchronous interface is automatic answer mode (i.e., if Modem’s AA indicator is on).If the modem is in automatic answer mode, the user has to be execute modem- autoanswer before using dialing function; if modem is not in automatic answer mode, the user has to be execute no modem-autoanswer.

If the configuration is inconsistent with the modem status, some incoming Modem calls may not be received normally.

2.4 Typical Configuration of Modem Management

2.4.1 Managing Modem with Modem Script

Modem

PSTN

	Quidway router
PC

Figure DC-2-1Networking diagram of router’s management configuration for modemExample 1: Modem automatically adapts to baud rate

For the asynchronous interface connected with modem, the baud rate of modem can be configured with standard AT command, in AT command set, set “AT” to modem, if “OK” is received, the modem can automatically match the corresponding baud rate, and the configuration is written into and saved in modem, the corresponding AT command is “AT&W”, therefore the corresponding configuration procedure is as follows:

1)Configure modem script

Quidway(config)# chat-script baud "" AT OK AT&W OK

2)Execute the corresponding script under interface configuration mode, assuming that modem is connected to interface Serial0.

Quidway(config)# interface serial 0

Quidway(config-if-Serial0)# start-chat baud

Example 2: Restore the ex-factory setting of modem

The modem command to restore ex-factory configuration nis “AT&F”, similar to the configuration procedure of setting baud rate:

Quidway(config)# chat-script factory "" AT OK AT&F OK

Quidway(config)# interface serial 0

Quidway(config-if-Serial0)# start-chat factory

2-5