Configure Modem emulator mode for a serial port

The serial port is enabled by default. To disable, toggle off Enable.

(Optional) For Label, enter a label that will be used when referring to this port.

For Baud rate, select the baud rate used by the device to which you want to connect. The default is 9600.

For Data bits, select the number of data bits used by the device to which you want to connect. The default is 8.

For Parity, select the type of parity used by the device to which you want to connect. The default is None.

For Stop bits, select the number of stop bits used by the device to which you want to connect. The default is 1

For Flow control, select the type of flow control used by the device to which you want to connect. The default is None.

For Idle timeout, type the amount of time that the active session can be idle before the session is disconnected.

Allowed values are any number of weeks, days, hours, minutes, or seconds, and take the format number{w|d|h|m|s}.

For example, to set Idle timeout to ten minutes, enter 10m or 600s.

For Escape character, type the character to use in the escape sequence. Enter this character three times, followed by the escape delay and then an AT command to switch from data mode to command mode. The default is the plus sign (+).

For Escape delay, type the delay between the escape sequence and an AT command to switch from data mode to command mode. The default is 1s.

For Auto-answer rings, type the number of rings to wait before auto-answering. Enter 0 (zero) to disable auto-answering.

Command echo is enabled by default. Commands sent to the port are echoed back to the user. Select to disable this feature.

For Result codes, select the type of result code that are displayed as responses to commands. Options are:

• None: No result codes are displayed.

• Numeric: Numeric result codes are displayed.

• Verbose: Result codes are displayed in English, for example: OK, ERROR, CONNECT. This is the default.

(Optional) Click to expand Phonebook and create dial strings that can be used to connect to remote servers.

1. Click  to add a phone book entry.

2. For Label, type a descriptive name for the phone book entry.

3. (Required) For Dialstring, type the string to dial to connect to the remote server.

4. (Required) For Connection destination, type the hostname or IP address of the remote server.

5. (Required) For Connection port, type the TCP port of the remote server. Minimum is 1 and maximum is 65535.

Expand TCP connection to configure TCP connection for this serial port.

1. To enable a TCP connection, click to toggle on Enable.

2. For Port, type the TCP port for this service. The default is 4001.

3. Expand Access control list to create a list of IP addresses, interfaces, and firewall zones from which this service may be accessed.

   • To limit access to specified IPv4 addresses and networks:
     1. Click IPv4 Addresses.
     2. For Add Address, click .
     3. For Address, enter the IPv4 address or network that can access the device's service-type. Allowed values are:
        • A single IP address or host name.
        • A network designation in CIDR notation, for example, 192.168.1.0/24.
        • any: No limit to IPv4 addresses that can access the service-type.
     4. Click  again to list additional IP addresses or networks.
   • To limit access to specified IPv6 addresses and networks:
     1. Click IPv6 Addresses.
     2. For Add Address, click .
     3. For Address, enter the IPv6 address or network that can access the device's service-type. Allowed values are:
     • A single IP address or host name.
     • A network designation in CIDR notation, for example, 2001:db8::/48.
     • any: No limit to IPv6 addresses that can access the service-type.
     4. Click  again to list additional IP addresses or networks.
   • To limit access to hosts connected through a specified interface on the device:
     1. Click Interfaces.
     2. For Add Interface, click .
     3. For Interface, select the appropriate interface from the dropdown.
     4. Click  again to allow access through additional interfaces.
   • To limit access based on firewall zones:
     1. Click Zones.
     2. For Add Zone, click .
     3. For Zone, select the appropriate firewall zone from the dropdown.

        See Firewall configuration for information about firewall zones.

     4. Click  again to allow access through additional firewall zones.

4. Toggle on Enable mDNS to enable Multicast DNS (mDNS) reporting for this service. This feature is disabled by default.

Expand Logging Settings to configure logging for this serial port.

1. To enable logging, click to toggle on Enable.

2. In the Log file name field, enter a descriptive name for the log file.

3. For Log file size, type the size of the log file. When the log file reaches the size limit, the current file is saved and a new file is created. The default is 65536 bytes.

4. From the Type of data to log list box, specify the type of data that should be saved.

   • Received

   • Transmitted

   • Both

   • Both with arrows. This is the default.

5. If you want to log the time at which date was received or transmitted, click the Timestamps toggle to Enable.

6. If you want to log the data as hexadecimal values, click the Hexadecimal toggle to Enable.

   Note You can review the message log in the Serial Port Log page. See Review the serial port message log.