PEB2085 SIEMENS [Siemens Semiconductor Group], PEB2085 Datasheet - Page 304

• Manufacturer Part Number: PEB2085
• Description: ISDN SubscribernAccess Controller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Semiconductor Group
case 0x1:
case 0x2:
case 0x0:
}
else
break;
if ((Two = (pt->pt_state & PT_M128)))
{
}
if (pt->pt_rx_cnt > 0)
pt->pt_rx_frame = PT_FR_S;
break;
if (pt->pt_op_mode == PT_MD_CLEAR_EXT)
Two = (pt->pt_state & PT_M128);
pt->pt_rx_frame = PT_FR_I;
if (AutoM && !(sapi & 0x02) && (pt->pt_ModulMode == PT_MM_TE))
if (AutoM)
pt->pt_rx_frame = PT_FR_UI;/* with I field are always treated
ctrl <<= 8;
ctrl
if (pt->pt_rx_cnt > 0)
else
frame_status = TOO_LONG;
{
pt->pt_rx_frame = PT_FR_TR;
break;
}
CR_of_I_valid = FALSE;
break;
pt->pt_rx_cnt--;
frame_status = MUTILATED;
|= (WORD) *ptr++;
/* as can be seen here U frames
/* as UI frames regardless whether
/* it’s an real UI frame or an
/* erroneous (= too long) U frame
/* *** HDLC S-Frame **
/* two byte control field ?
/* Second byte of the two byte
/* control field is missing !
/* S frame with I-field !
/* *** HDLC I frame **
/* no address recognition
/* C/R bit of received I frame
/* valid (=1) in TE configuration ? */
/* If ’CR_of_I_valid’ is FALSE the
/* automatic acknowledge of an
/* I frame in Automode is
/* prevented! A protocol software
/* will receive the PROTOCOL_ERROR
/* message and re-establish the
/* link.
304
Low Level Controller
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