V.120 Configuration Commands
AT!E5=n | V.120 N200 (Maximum Retry Count). Applicable to the multiframe mode only. N200 |
| (Maximum Retry Count) is a system parameter which identifies the maximum number |
| of retransmissions of a frame due to T200 expiring. When the maximum number of |
| retransmissions is reached, the recovery process is started which may cause call |
| disconnection. |
| Range: 1 to 10. |
| Default: 3. |
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AT!E6=n | V.120 T203 (Link Integrity Timer). Applicable to the multiframe mode only. T203 (Link |
| Integrity Timer) is the maximum time allowed without frames (including data and |
| control) being exchanged. Its purpose is to verify that the remote device is still online |
| and operational. When the Link Integrity Timer expires, recovery procedures are started |
| which may cause the disconnection of the current call. |
| The unit of measurement is seconds. |
| Range: 1 to 255. |
| Default: 30. |
| The value specified for T200 (Retransmission Timer) (see “AT!E4=n” on page 42) must |
| be less than the value specified for T203 (Link Integrity Timer). Otherwise, the default |
| values are used. |
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AT!E7=n | V.120 Idle Timer. Idle Timer refers to the maximum time without the exchange of data |
| frames between the local and the remote devices and before the automatic termination |
| of the connection. Its purpose is to reduce communications costs while data is not |
| being transferred for a period of time (operates in both the multiframe and |
| unacknowledgement modes). When Idle Timer expires, this immediately initiates the |
| disconnection of calls. Setting a zero value disables Idle Timer. |
| The unit of measurement is minutes. |
| Range: 0 to 10000. |
| Default: 1440 (24 hours). |
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