使用bg96进行拨号后，挂机一段时间会出现错误。

[flquchi]

以下为错误内容：
E (517666601) esp_netif_lwip: Post-attach callback of driver(0x3ffe10e4) failed with -1


I/MM [2023-10-30 17:20:04] msg: id[0x00030007], type[0x01]
I/MM [2023-10-30 17:20:04] MM_MSG_INNER_PPP_START_CHECK
I/modem_api [2023-10-30 17:20:04] modem start!
E/esp-modem [2023-10-30 17:20:07] (346 esp_modem_dte_send_cmd)process command timeout
E/dce_service [2023-10-30 17:20:07] (48 esp_modem_dce_sync)send command failed
I/esp-modem-netif [2023-10-30 17:20:07] set sync ERROR
E (517944941) esp_netif_lwip: Post-attach callback of driver(0x3ffe10e4) failed with -1
I/MM [2023-10-30 17:20:27] msg: id[0x00030007], type[0x01]
I/MM [2023-10-30 17:20:27] MM_MSG_INNER_PPP_START_CHECK
I/modem_api [2023-10-30 17:20:27] modem start!
E/esp-modem [2023-10-30 17:20:30] (346 esp_modem_dte_send_cmd)process command timeout
E/dce_service [2023-10-30 17:20:30] (48 esp_modem_dce_sync)send command failed
I/esp-modem-netif [2023-10-30 17:20:30] set sync ERROR
E (517968251) esp_netif_lwip: Post-attach callback of driver(0x3ffe10e4) failed with -1
I/MM [2023-10-30 17:20:50] msg: id[0x00030007], type[0x01]
I/MM [2023-10-30 17:20:50] MM_MSG_INNER_PPP_START_CHECK
I/modem_api [2023-10-30 17:20:50] modem start!
E/esp-modem [2023-10-30 17:20:53] (346 esp_modem_dte_send_cmd)process command timeout
E/dce_service [2023-10-30 17:20:53] (48 esp_modem_dce_sync)send command failed
I/esp-modem-netif [2023-10-30 17:20:53] set sync ERROR
E (517991481) esp_netif_lwip: Post-attach callback of driver(0x3ffe10e4) failed with -1
I/MM [2023-10-30 17:21:13] msg: id[0x00030007], type[0x01]
I/MM [2023-10-30 17:21:13] MM_MSG_INNER_PPP_START_CHECK
I/modem_api [2023-10-30 17:21:13] modem start!
E/esp-modem [2023-10-30 17:21:16] (346 esp_modem_dte_send_cmd)process command timeout
E/dce_service [2023-10-30 17:21:16] (48 esp_modem_dce_sync)send command failed
I/esp-modem-netif [2023-10-30 17:21:16] set sync ERROR
E (518014751) esp_netif_lwip: Post-attach callback of driver(0x3ffe10e4) failed with -1