zammad/app/frontend/shared/entities/ticket-article/composables/channelIconsMap.json

{
  "chat": "mobile-chat",
  "email": "mobile-mail",
  "facebook": "mobile-facebook",
  "fax": "mobile-printer",
  "note": "mobile-note",
  "phone": "mobile-phone",
  "sms": "mobile-message",
  "telegram": "mobile-telegram",
  "twitter": "mobile-twitter",
  "web": "mobile-web"
}