MTCMR-H4-P1-GB/IE Multi-Tech Systems, MTCMR-H4-P1-GB/IE Datasheet - Page 101

• Manufacturer Part Number: MTCMR-H4-P1-GB/IE
• Description: MODEM CELLULAR QUAD GPRS HSPA
• Manufacturer: Multi-Tech Systems
• Series: MultiModem® iCellr

Specifications of MTCMR-H4-P1-GB/IE

• Function: Transceiver, HSPA, Modem
• Modulation Or Protocol: GPRS, GSM, EDGE
• Frequency: 850MHz, 900MHz, 1.8GHz, 1.9GHz
• Applications: General Purpose
• Interface: RS-232, USB
• Data Rate - Maximum: 7.2 Mbps
• Features: UK Power Cord
• Voltage - Supply: 9 V ~ 32 V, USB
• Package / Case: Module
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 881-1122

High Speed HSPA-H4 AT Commands Reference Guide (Document S000483A)
+CHLD Call Related Supplementary Services
Description:
Syntax:
Values:
Parameter Storage: None
Examples:
This command manages call hold and multiparty conversations (conference calls). Calls can
be put on hold, recovered, released or added to a conversation.
Call hold and multiparty are only applicable to teleservice 11 (speech telephony)
<n> Call-Related Services
Command
AT+CHLD=?
ATD0123456789;
+WIND: 5,1
AT+CLCC
+WIND: 5,2
Note: incoming call in waiting state
AT+CLCC
Note: Com id 1 is active, com id 2 is in waiting
state
AT+CHLD=2
AT+CLCC
Command
Action Command:
AT+CHLD=< n >
Read Command:
AT+CHLD?
Test Command:
AT+CHLD=?
0
1
1x Release a specific call X (active, held or waiting)
2
2x Place all active calls on hold except call X with which communication is supported
3
4
Release all held calls or set User Determined User Busy (UDUB) for a waiting call
Release all active calls (if any exist) and accept the other (held or waiting) call
Place all active calls (if any exist) on hold and accept the other (held or waiting)
call
Add a held call to the conversation
Connects the two calls and disconnect the subscriber from both calls (Explicit Call
Transfer)
OK
+CHLD: (list of supported
<n>s)
OK
Response
OK
Chapter 3 – Supported GSM/WCDMA AT Commands
Responses
+CHLD: (0-4, 11-17, 21-27)
OK
OK
+CLCC: 1,0,0,0,0,"0123456789",129
OK
+CLCC: 1,0,0,0,0,"0123456789",129
+CLCC: 2,1,5,0,0
OK
OK
+CLCC: 1,0,1,0,0,"0123456789",129
+CLCC: 2,1,0,0,0
OK
Note: Com id 1 is held, com id 2 is
active
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