[Koha] Problem with SIP2

[Gonzalo Córdova Mío]

Hello. I have a problem with SIP2, I imagine it is due to some incorrect
configuration. We have a self-loan machine and a self-return machine. From
time to time the self-loan machine disconnects and after a while it
reconnects. Another detail is that the self-return team sometimes does not
record the returns, so it does not communicate the self-return to Koha
either. I use Koha 23.05 on Ubuntu 22.04 and the equipment is from 3M

Can someone help me solve the problem? I have my SIP configuration file
like this:

<server-params
    min_servers='10'
    min_spare_servers='5'
    log_file='Sys::Syslog'
    syslog_ident='koha_sip'
    syslog_facility='local6'
  />

<listeners>
<service
      port="8023/tcp"
      transport="RAW"
      protocol="SIP/2.00"
      timeout="60" />
<service
      port="6001/tcp"
      transport="RAW"
      protocol="SIP/2.00"
      client_timeout="0"
      timeout="60" />
</listeners>

<accounts>
      <login id="UsuarioSip"  password="Contraseña" delimiter="|"
error-detect="enabled" institution="BIBUNI" encoding="ascii"
checked_in_ok="1" />
      <login id="koha"   password="koha"  delimiter="|"
error-detect="enabled" institution="BIBUNI" encoding="utf8" />
      <login id="koha2"  password="koha" institution="kohalibrary2"
terminator="CR" />
      <login id="lpl-sc" password="1234" institution="LPL" />
      <login id="lpl-sc-beacock" password="xyzzy"
             delimiter="|" error-detect="enabled" institution="LPL"
             send_patron_home_library_in_af="1"
             av_field_template="[% accountline.description %] [%
accountline.amountoutstanding | format('%.2f') %]"
             holds_block_checkin="0"
             holds_get_captured="1"
             overdues_block_checkout="1"
             format_due_date="0"
             inhouse_item_types=""
             inhouse_patron_categories=""
             seen_on_item_information="mark_found"> <!-- could be
"keep_lost", empty to disable -->
          <screen_msg_regex find="Greetings from Koha." replace="Welcome to
your library!" />
          <screen_msg_regex find="Invalid patron barcode." replace="Barcode
not found, are you sure this is your library card?" />
      </login>
</accounts>

Saludos,

--------
Gonzalo Córdova Mío