BusinessPhone Communication Platform 4.0
Facilities

## ISDN Basic Access, ISDN Primary Rate Access

## Definition

The ISDN (PRA/BA) trunk lines of ASB 150 02 make possible the access to an ISDN network specified according to ACA, ETSI standards and also country- specific versions of the ETSI standard.

The PRA comprises 30 B-channels, one synchronisation channel and one D-channel. The BA comprises 2B channels and one D-channel.

In case of the BA, the ASB 150 02 system can be connected to the Network Terminator in a point to point or point to multipoint configuration

PRA's and BA’s scope of services in ASB 150 02 includes “Basic Call“ and the following supplementary services.

- DDI
  Direct Dialling In
- AOC
  Advice of Charge
- CLIP
  Calling Line Identification Presentation
- CLIR
  Calling Line Identification Restriction
- COLP
  Connected Line Identification Presentation
- COLR
  Connected Line Identification Restriction
- MCID
  Malicious Call Identification
- MSN
  Multiple Subscriber Number
- SUB
  Sub-addressing

You will find a detailed description in the following chapters.

At first initialisation of the PBX, a directory number starting with 700 upwards is assigned to each trunk individual, according to the number of B-channels.

Compared to analogue trunks or digital CAS-lines there is normally no relation between the trunk individual and the B-channel (corresponds to the physical external line in the analogue world)

PRA's and BA's B-channels may be seen as independent trunk lines, although it is only possible to seize one outgoing direction.

## Use

See Outgoing External Calls (381/155 34-ASB 150 02 Uen), and Incoming External Calls (262/155 34-ASB 150 02 Uen).

## Operation

See Outgoing External Calls (381/155 34-ASB 150 02 Uen), and Incoming External Calls (262/155 34-ASB 150 02 Uen).

## Capacity

The maximum number of trunk lines is determined by the number of speech channels in the system (60).

32 different public numbers can be assigned to the trunks for the number composition of the number to be displayed at the calling as well as called party. Up to 16 digits can be programmed per public number.

## Limitations

Transit traffic to another trunk line (ISDN or analogue) is allowed but no ISDN facilities are supported.

Supplementary services are always valid for the complete link.

In case of outgoing traffic it is possible in ASB 150 02 to create groups of channels for defined purposes (e.g. tenant groups) but it depends on the national network operator if this is also supported.

In case of incoming traffic it is not possible to assign B-channels to specific groups. If special applications like ACD-groups require dedicated trunk resources a complete link (PRA or BA) has to be used without DDI subscription.

Basic Access connected in a point to multipoint configuration to the NT.

In this configuration only equipment which support the Packet Mode Bearer Services may be connected to the NT in addition to the ASB 150 02 systems.

## Programming

### Recommended programming procedure

- Program the individual link
- Program one route at a time
- Program one line in the route and copy its data to the other lines of the link.

### Commands for the individual link

The command group 19 refers to the respective selected trunk board and individual link (BTU‑D = 1 link, BTU-B_ = 8 (4) links; MFU= 4 links)

1910 |  | Interface typeNetwork signalling protocol

1911 |  | Network signaling tables

1912 |  | Termination in ASB 150

1913 |  | B-channel selection mode

1916 |  | Overlap receiving of called party number

1919 |  | Assigned TEI value

1920 |  | CRC4 check

1921 |  | Ignore inband info at disconnection

1922 |  | Through connection after SETUP to net?

1946 |  | Forced message after timeout

### Supplementary Services

You may find a detailed description of the following commands in the respective description of the supplementary service.

1914 |  | Charging method (see ISDN SS Advice Of Charge (AOC))

1915 |  | Provision of calling line identification (see ISDN SS Calling Line Identification Presentation (CLIP))

1917 |  | MCID activation request allowed (see ISDN SS Malicous Call Identification (MCID))

1918 |  | Provision of connected line identification (see ISDN SS Connected Line Identification Presentation (COLP))

### Command for individual trunk numbers

5605 |  | Trunk directory number

5606 |  | Alter trunk directory number

5607 |  | Alter number series for trunk line

### Categorisation

1001 |  | Facility COS

1002 |  | Traffic group

1003 |  | TCD-day COS

1004 |  | TCD-night COS

1005 |  | Common abbreviated number COS

1006 |  | Call back allowed ?

1007 |  | Break-in allowed?

1008 |  | Camp-on to answering position ?

1020 |  | Pick up parked trunk ?

1022 |  | Voice info to trunk allowed ?

### Night service

See also Night Service (362/155 34-ASB 150 02 Uen).

1019 |  | Night-switching group

### Outgoing Traffic

1013 |  | Dial tone to extension?

1014 |  | Result tones to parent exchange ?

1015 |  | Pre-digits for number analysis

1018 |  | Subsystem to PBX ?

1307 |  | PTS-signal from parent exchange ?

1308 |  | PTS-signal from parent exchange = dial tone

1410 |  | Time for recall on camp-on

### Incoming traffic

1101 |  | Answering position at day

1102 |  | Answering position at night

1103 |  | Reroute position at day

1104 |  | Reroute position at night

This is where unanswered external calls are routed during the night switching mode.

#### Direct in-dialling

For further information see ISDN SS Direct Dialling In (DDI).

1009 |  | Reroute on answering position barred?

1010 |  | Reroute on answering position blocked?

1011 |  | Reroute on answering position vacant?

1012 |  | Reroute on answering position busy?

1016 |  | Reroute on no answer?

1017 |  | Reroute on incomplete number ?

1023 |  | Trunk line type

1030 |  | Public number group

1309 |  | PTS-signal from parent exchange = dial tone

1411 |  | Time supervision for first digit at automatic incoming traffic

1412 |  | Time supervision between digits at automatic incoming traffic

1413 |  | Time supervision of answer at automatic incoming traffic

1801 |  | Incoming common number at automatic incoming traffic

1802 |  | Pre-digits at automatic incoming traffic

1803 |  | Irrelevant digits at automatic incoming traffic

1925 |  | Pre-digit removal for E.164 number plan with unknown typ of number

1927 |  | Pre-digit removal for E.164 number plan with national typ of number

1928 |  | Pre-digit removal for E.164 number plan with network specific typ of number

1929 |  | Pre-digit removal for E.164 number plan with local directory typ of number

1930 |  | Pre-digit removal for private plan with unknown typ of number

1931 |  | Pre-digit removal for private plan with Level 1 regional type of number

1932 |  | Pre-digit removal for private plan with Level 2 regional type of number

1933 |  | Pre-digit removal for private plan with Level 3 regional type of number

1934 |  | Pre-digit removal for private plan with PTN specific type of number

1935 |  | Pre-digit removal for private plan with local type of number

### Monitoring Times

Time-out adjustments for digit transmission.

1406 |  | Wait time before ring back/rerouting at not answered calls

1407 |  | Maximum hold time

1408 |  | Minimum speech time for not increasing disturbance counter

1409 |  | Time for recall on transfer before answer.

### Digital link parameters

The following commands are valid for all configured ISDN system connections.

2060 |  | Consolidation time from alarm to OK

2061 |  | First priority link for synchronisation

2062 |  | Second priority link for synchronisation

2063 |  | Third priority link for synchronisation

2064 |  | Fourth priority link for synchronisation

2065 |  | Fifth priority link for synchronisation

### Number analysis

In this command group the exchange's national significant number will be defined to be used for the supplementary service CLIP and COLP. (Depending on the configuration of the following commands ASB 150 02 sends out either the complete national significant number, the subscriber number or only the directory number of the called or calling extension.)

According to the CCITT numberplan E.164 the national significant number comprises the national destination code and the subscriber number.

The subscriber number comprises the public access number + directory number of the connected or calling extension.

ASB 150 02 creates the national significant number by connecting the defined digits from command 2220 + directory number of the connected or calling extension.

2220 |  | Public number

## Equipment

BTU-D with ISDN prom set or BTU-B_ or MFU.

Revision: H © Ericsson Enterprise 2003