Keywords: MESi, telephony, DSP products, telecommunications, wireless, wireless signal processing, Baudot, TTY, caller ID, DTMF, MFC, R1, R2, T.38, Fax Relay, Fax Intercept, V.17, V.21, V.22, V.23, V.26, V.27, V.29, V.32, V.34, V.150, modem, software modem, Bell modem, call progress, STU-III Relay, FSVS-210