From: Brad Dye's Paging Information Resource Page

The latest on paging from Europe

APOC Brief

APOC is the latest of the three High Speed paging codes being promoted world-wide. It was announced in 1993. Compatibility is the key to APOC. Compatibility between pagers of all manufacturers, compatibility between pagers and all paging systems and compatibility with existing POCSAG networks. The features of APOC can be gradually applied to existing POCSAG systems without loss of capacity or incompatibility with existing pagers. These features are:


APOC increases system capacity over POCSAG 1200 as follows:

CodeNumeric and text7-digit (C) numericText (C)
POCSAG 1200111
APOC 24002.103.144.19
APOC 3200 2.804.195.59
APOC 48004.206.298.39
APOC 64005.608.3911.19

C = compression used.


The Battery Saving Ratio (BSR) used to measure the battery saving performance is independent of data rate. Typically the BSR is 100:1 (compared with 5.67:1 for POCSAG) for message delays of less than 4 seconds.

Copies of the specification can be obtained by writing to Anthony Sharpe, Tel. +44 1223 586228; Fax +44 1223 357112.

RAMP Brief

The Radio Access Mail Protocol, developed by Philips, is a family of two way paging codes. This family is:

APOC Phase 1+Two way APOC Phase 1
APOC High Speed+ Two way APOC High Speed
RAMP Supports up to 32000 bps

Paging systems may be upgraded in a variety of ways. Enhancing a system from one way to two way only involves adding receive equipment to existing paging systems. Roaming between all two way and one way systems and pagers is maintained. All systems operate using 25 kHz channels. A single channel can be time shared, or two channels can be used. The uplink data rates are variable, and range from 0.5 bps (for simple applications) to 9600 bps for more demanding applications. For the simple applications, a 1:1 ratio of receive and transmit sites is achieved using omnidirectional antennas.

Questions should be addressed to:
John Bell, Philips Paging.