BusinessPhone Communication Platform 7.0
Facilities

## Analog Telephone

## Definition

Analog telephone denotes the connection of a standard telephone with rotary dial or Dual Tone Multi Frequency (DTMF) signalling.
The concept also embraces other equipment that from a signalling point of view functions like an analog telephone.

Since ASB 150 02 Release 15 R3A analog CLIP (Calling Line Identification Presentation) according to ETSI EN 300 659-1 Annex B (DTMF based subscriber line protocol for on-hook data transmission prior to ringing) is supported.

## Use

Analog connection can be significant for the connection of special units such as:

- Telephone answering machine
- Telefax
- Modem
- Entryphone
- Telephones for special environments

## Operation

For basic operation see Facility Description - General (15534‑ASB 150 02 Uen)

Depending on programming the CLIP information can be sent to analog phones. CLIP information is sent before ringing. Depending on the revision of the ELU-A polarity reversal prior to the CLIP information is sent. See Equipment

Attention for guest room extensions:

The call list of the analog telephone is not erased in case of a check out.

### For Ericsson Analog Telephones refer to the system overview

## Capacity

The number of analog connections is limited by the number of connected ELU-A boards and the maximum extension capacity (200, for hotel configurations the limit is 300).

Each ELU-A board offers 16 connection options.

Each ELU-A board has four DTMF-receivers and one ring generator.

## Limitations

### General

In certain cases units such as modems and telephone answering machines require ring signals of a certain duration. Such extension positions can be programmed so that only a single ring signal is provided, irrespective of whether the call is external or internal.

For analog extensions it is not possible to enable ringing for all individuals on the same board at the same time. An analog extension board (ELU-A) can provide the ringing voltage only for one instrument at the same time. The request for all other instruments will be queued. In that case the ringing signal will be multiplexed over the queued instruments. The repetition rate of the ringing signal will go down depending on the number of parallel ringing instruments located on the same board.

### CLIP

The CLIP information can only be shown on appropriate analog phones.

Only DTMF signalling is supported.

CLIP information can not be shown on analog instruments if they are used within PBX-group functionality. The same limitation exists if analog instruments are used as master with programmed ringing on master and slave.

If the analog instruments are connected to the MFU board the analog CLIP can only be handled for one individual at the same time. The other CLIP requests are queued as long as the ongoing request is finished. The ring characteristic on the MFU board changes if at the same time message waiting indication and analog CLIP is used.

If a telephone, equipped with a message waiting led is connected to an ELU-A with PCB-Code=R9A or higher (supports polarity reversal) or a MFU, then analogue CLIP may not be activated (command 0198).

## Programming

### General

0122 |  | Long ring bursts?

0124 |  | Call waiting tone for non system instruments?

The following commands are only accessable via BMS:

0143 |  | Line break time for ELU-A

2007 |  | Rotary dial type

2105 |  | Minimum release signal

2106 |  | Minimum register signal

### Transmission Characteristics

2025 |  | Nominal impedance for analogue extensions

2026 |  | Attenuation for DTMF-signalling

0139 |  | Filter coefficient

0140 |  | Transmission group

0141 |  | Relative sending level

0142 |  | Relative receiving level

### CLIP

0198 |  | CLIP for Analogue Extensions

0199 |  | Attenuation for DTMF‑signaling for Analogue CLIP

2098 |  | Start/Stop indicator for Analogue CLIP

2610 |  | Number of DTMF tones (must be set to 16)

2611 |  | Level

2612 |  | Level difference

2613 |  | Signal time

2614 |  | Pause time

External incoming calls are prefixed according:

1936 |  | Prefix calling number for E.164 number plan with international type of number

1937 |  | Prefix calling number for E.164 number plan with national type of number

6803 |  | Tenant-Route

## Error situations

3D warning (W.AAINVPAR) is generated if the FW does not allow analogue CLIP but the command 0198 is set to yes.

- D1 - ST.EXINP
- D2 - 0A Identifier for analogue CLIP

46 warning (W.AANAK) is generated if TSU (tone sender unit) is not available.

## Equipment

### General

ELU-A board and / or MFU board

### CLIP

ASB 150 02 R15 R3A or higher.

ELU-A board and / or MFU board with appropriate firmware.

ELU-A must have PCB-Code=R7A or R8A without polarity reversal

ELU-A with PCB-Code=R9A or higher with polarity reversal

Revision: J © Ericsson Enterprise 2005