Specifications

Chapter 1 – Introduction

Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371B) 18

1.8 Common PCN Handset Specification (CPHS)

The ME provides features to implement a device following the prerequisites of the Common PCN Handset

Specification (CPHS) Phase 2.

CPHS Feature Description/Remarks AT command

Alternate Line Service Using two phone numbers with one SIM card. AT^SALS

Voice Message Waiting

Indication

Indicate the receipt of a short message coded as Voice

Message Waiting Indicator as defined by the CPHS Phase 2

standard.

AT^SIND,

AT+CMER, indicators

“vmwait1” and “vmwait2”

Operator (Service provider)

name from SIM

Read specific Elementary Files (6F14h, 6F18h) from SIM. AT+CRSM

Network and Service Provider

Lock

Lock/Unlock an ME to specific HPLMN and service provider. AT+CLCK, (AT+CPIN)

Call Forwarding Get and set diverted call status. Access specific Elementary

File (6F13h) from SIM.

AT+CCFC, AT+CRSM

Customer Service Profile

(CSP)

Setting services and their menu entries depending on

customer profiles.

AT+CRSM

Information numbers Hierarchically structured service numbers phonebook on

SIM according to CPHS 4.2 (mandatory).

AT+CRSM

1.9 Errors and Messages

The command result codes “+CME ERROR: <err>” and “+CMS ERROR: <err>” indicate errors related to mobile

equipment or network functionality.

The format of <err> can be either numeric or verbose and is selectable via AT+CMEE.

A result error code terminates the execution of the command and prevents the execution of all remaining commands

that may follow on the same command line. If so, neither “ERROR” nor “OK” result codes are returned for these

commands. A 30 seconds timeout will deliver “ERROR” when the input of a command is not complete.

Using the wrong command syntax may result in errors: For example, using the execute command syntax although

the command has no execute format, causes “ERROR” to be returned. Likewise, using the write command syntax

although the command has no write format causes “+CME ERROR: <err>” to be returned.