Epson TM-T88VI-iHUB, Reference Manual

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Appendix
Socket communication
Encryption protocol
Digital certificate
* The PEM format is supported only when registering and updating the secret key to update the certificate
using the WebContentsUpdate function.
Notes on Using the Wi-Fi Model

Keep the printer away from the devices, such as kitchen microwaves, that may cause radio wave interference.

Use channels that are away from the frequency bands that may cause radio wave interference.

Place shields between the printer and the devices that may cause radio wave interference.

Select either 2.4 GHz or 5 GHz, whichever is free from radio wave interference.

In auto channel setting for the access point, do not select a channel in which the printer may cause radio
wave interference.

Port type: TCP communication port for direct printing

Port number: 9100

Port communication direction: bidirectional

Max. simultaneous connections: 6

Number of connections for which printing is
available: 1 (Other users need to wait until printing is
completed.)

Time out: 90 sec. (changeable)
Protocol Usage
TLS For encrypted HTTPS communication
WEP For encrypted wireless communication
WPA2-Personal For encrypted wireless communication
WPA2-Enterprise EAP-TLS For encrypted wireless communication
PEAP-TLS
PEAP-MSCHAPv2
Certificate data Supported file format
Certificate data wit a secret key PKCS#12, PEM*
Certificate data without a secret key PEM, DER