Wireless GSM/GPRS Modems Reference Guide

Chapter 3 – General Behaviors
Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 12
Since the maximum length for the numbers in the ADN, FDN, and LND phonebooks is 60 digits:
• if the user tries to dial a number that exceeds 60 digits: +CME: 3
Before the user can perform a call, the number of free records in the EF
EXT1
is checked for availability of free space to
store this number.
• If there are free records left, the call is setup.
• Otherwise, +CME: 20 error is returned (Memory Full).
See Recommendation 3GPP 11.11 for more details.