Gemalto Cinterion EHS6 - 4.3 AT&D Set Data Terminal Ready (DTR) Line Mode

Cinterion
®
EHS6 AT Command Set 
4.3 AT&D
 EHS6_ATC_V03.001 15/12/3
Confidential / Released
Page 104 of 513
4.3 AT&D Set Data Terminal Ready (DTR) Line Mode
AT&D determines how the ME responds if the DTR line is changed from ON to OFF state during data connection
(CSD or PPP or active Internet Services transparent access mode; refer to AT^SIST). 

AT&D offers full functionality only if the DTR0 line is enabled with AT^SCFG="GPIO/mode/DTR0","std". Otherwise
AT&D will respond "+CME ERROR: operation not allowed". 
Syntax

Parameter Description
[0] ME ignores status of the DTR line.
1 ON->OFF on DTR: Change to command mode while retaining the data con-
nection.
2
(&F)
ON->OFF on DTR: Disconnect the data connection (only for CSD and PPP)
and change to command mode. For Internet service the behaviour is like
AT&D1. During OFF state of the DTR line the auto-answer function (see ATS0)
is disabled.
Exec Command
AT&D[<value>]
Response(s)
OK
PIN  Last Reference(s)
- + - V.250
<value>
(num)(&V)(&W)