Specifications include, but are not limited to: The Offeror shall conduct an implementation meeting to collect data associated with text messages and voice messages and to determine the requirements from the interface file. Implementation meeting shall be held no later than 30 days after the start of the contract. The Offeror shall provide an internet based messaging system with no need to purchase or maintain equipment, phone lines, mobile phone plans or to manually intervene in the automated process on a daily basis. The Offeror shall contact clients via text messages or voice messages based on details in the daily file from the VISION system (for WIC). The Offeror shall determine whether the phone number for each household provided in the file is a mobile phone or a land line in order to determine whether to send a text message or place a voice call based on the details in the daily file from VISION. The Offeror shall send customized SMS text message reminders of upcoming and missed appointments and/or specific appointment types to mobile phones based on the details in the daily file in English or Spanish based on details in the daily file.