The following smsc and modems group sections work fine with Siemens TC35, including delivery reports.
group = smsc smsc = at2 modemtype = siemens-tc35 device = /dev/ttyS0 speed = 19200 keepalive = 0 sim-buffering = false group = modems id = siemens-tc35 name = "Siemens TC35" detect-string = "SIEMENS" detect-string2 = "TC35" init-string = "AT+CNMI=2,3,0,1,1" speed=19200 enable-hwhs = "AT\\Q3"
