Supplementary Service Commands; Chld-Set Call Related Supplementary Services; Command Syntax; Description - Huawei MU509 At Command Interface Specification

HUAWEI MU509 HSDPA LGA Module
AT Command Interface Specification
10
10.1 +CHLD–Set Call Related Supplementary Services

10.1.1 Command Syntax

Command
+CHLD[=<n>]
+CHLD=?

10.1.2 Description

The SET command supplies operation for call related supplementary services.
The TEST command returns a list of operations which are supported. The call number
required by some operations shall be denoted by „x‟. The range of x is 1–9.

10.1.3 Defined Values

<n>
0: Releases all held calls or sets User Determined User Busy (UDUB) for a waiting
call.
1: Releases all active calls (if any exist) and accepts the other (being held or waiting)
call.
1X: Releases a specific active call X in originate connecting status, hold or active
status. For example, when <n> is 12, it means release call 2.
2: Places all active calls (if any exist) on hold and accepts the other (being held or
waiting) call (default value).
Issue 04 (2013-01-28)

Supplementary Service Commands

Possible response(s)
<CR><LF>OK<CR><LF>
In case of MS-related error:
<CR><LF>ERROR<CR><LF>
<CR><LF>+CME ERROR: <err><CR><LF>
<CR><LF>+CHLD: (list of supported <n>s)<CR><LF>
<CR><LF>OK<CR><LF>
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Supplementary Service Commands
146