Motorola Quick Call 2 – “QC2”

Two-Tone Paging – Quick Call 2 is one of the many paging formats which are collectively known as Two-Tone paging. For most pages, the encoders produce two individual audio tones with specific timing, in sequence. The pagers receive the tones and examine them. If the transmitted tones and timing match what the pager was programmed for, the pager will activate.

Individual / Group Paging – Motorola Quick Call 2 paging codes are transmitted at a 1 second, 3 second timing with no silence gap between the tones. The timing is referred to as 1/3 and is pronounced “one second, three second” not “one divided by three”. 1/3 timing is normally employed to activate individual pagers or groups of pagers.

All-Call – QC2 also has a provision to activate an entire fleet of individual or group pagers with one signal. This is the All-Call page. An All-Call page is a continuous tone which lasts for 8 seconds. Pagers which have the All-Call tone as part of their individual or group tone, will normally activate with this All-Call signal as well.

All-Call paging is normally activated by pressing the same code button twice on the encoder. For example, if you enter the code 61 from code group 4, the encoder knows you want to send a 1 second / 3 second page with the tones 445.7 Hz & 339.6 Hz. However if you enter the code 66 from code group 4, the encoder will send an 8 second All-Call page of 445.7 Hz.

Stacked Paging – Many paging encoders and most law enforcement and fire department communications consoles, have the ability to transmit an entire group of pages with the press of one button. Each page is transmitted with a small silence gap (usually one second) inserted between each page so the pagers can determine the end of a page, then analyze if that last page was for them.

Activate other devices – Paging technology is also incorporated into other control devices. These are usually referred to as receivers/decoders/controllers also known as “RDC”. The RXC-3000 is an RDC. The first two functions of receiving and decoding are exactly what a pager does, however the controller function is what really sets them apart. An RDC has various output relays and audio, in addition to local activation controls which can be programmed to perform various actions when it picks up the correct paging code. Whereas a pager can only beep and give a voice message, an RDC can take that same pager signal and begin an entirely new process of controlling equipment and process from the same page. A common function for an RDC is to activate a fire siren when a fire call is dispatched. Using internal timers and output relays, the RDC can engage the siren for a predetermined time, then automatically turn it off. RDC’s can also open overhead doors, turn on pumps, light up rooms or equipment bays and engage PA systems to deliver audio messages. All this is done transparently using the same signal sent to the pagers.

Listen to a Motorola QC2 page being transmitted. It is a Group 1 page, with a 09 code. The tone frequencies are 330.5 Hz & 539.0 Hz with a timing of 1 second / 3 second.

Listen to a Motorola QC2 page. It is a Group 6 page, with a 53 code. The tone frequencies are 1285.8 Hz & 1217.8 Hz with a timing of 1 second / 3 second.

Listen to a Motorola QC2 All-Call page. It is a Group 4 page, with a 00 code. The tone frequency is 321.7 Hz for 8 seconds.

Listen to a group of QC2 Stacked pages. There are a total of four pages. Each page is separated by one second of silence. The pages are 217, 570, 493 and 166. The first three are group calls, while the final code of 166 is an 8 second All-call page.

The following tables show the key codes as well as their corresponding frequencies.

Key # is the pushbutton on the encoder for paging encoders with up to 99 calls. If more than 99 paging calls are required, then the tones from the following tables are arranged in a General Encoding Plan to mix the various reed groups. If an extremely wide number of paging codes are required, it may be necessary to use the Motorola Code Table.

Group Information

Identifier shows group and position.
All Frequencies are in Hz.