Aastra IntelliGate A150 User guide

A150
A300
2025
2045
2065
Ascotel® IntelliGate® Communications Systems
Interfaces and Terminals as of I7.8
System Manual

Interfaces and Terminals as of I7.8
2
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1 Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1. 1 About the products. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1. 2 About this document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
1. 3 Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
2 System Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2. 1 Network Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2. 1. 1 Basic Access Variants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2. 1. 1. 1 Basic Access T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2. 1. 1. 2 Basic Access S External. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
2. 1. 1. 3 Point-to-Point and Point-to-Multipoint Connections . . . . . . . . . . . . . .13
2. 1. 2 Primary Rate Access T2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
2. 1. 2. 1 Clock synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
2. 1. 2. 2 Digital down-circuit connection of a PBX with QSIG . . . . . . . . . . . . . . .19
2. 1. 2. 3 Direct Dialling Out (DDO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
2. 1. 3 SIP access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
2. 1. 4 Analogue Network Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
2. 1. 4. 1 Analogue down-circuit connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
2. 1. 4. 2 Attenuation on analogue network interfaces . . . . . . . . . . . . . . . . . . . . .28
2. 2 Terminal interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
2. 2. 1 Digital user-network interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
2. 2. 1. 1 User-network interface S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
2. 2. 1. 2 AD2 terminal interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
2. 2. 1. 3 IP terminal interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
2. 2. 2 Analogue terminal interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
2. 3 Special Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
2. 3. 1 Ethernet interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
2. 3. 2 V.24 Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
2. 3. 2. 1 V.24 standard. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
2. 3. 2. 2 Flow control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
2. 3. 3 Interface for Door Intercom System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
2. 3. 4 Interface for General Bell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
3 Terminals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
3. 1 System terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
3. 2 Corded AD2 system terminals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
3. 2. 1 Office 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
3. 2. 2 Office 25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Content

Interfaces and Terminals as of I7.8
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3. 2. 3 Office 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
3. 2. 4 Office 45 / Office 45pro. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
3. 2. 5 Options for Office 35 and Office 45/45pro. . . . . . . . . . . . . . . . . . . . . . . . 48
3. 2. 5. 1 expansion keypad EKP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
3. 2. 5. 2 Alphanumerical keyboard AKB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
3. 2. 6 Aastra 5360 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
3. 2. 7 Aastra 5370 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
3. 2. 8 Aastra 5380 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
3. 2. 9 Options for Aastra 5370 and Aastra 5380. . . . . . . . . . . . . . . . . . . . . . . . . 54
3. 2. 9. 1 expansion keypads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
3. 2. 9. 2 Plug-in power supply unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
3. 2. 10 Older AD2 system terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
3. 3 Cordless DECT system terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
3. 3. 1 Overview of cordless DECT system terminals. . . . . . . . . . . . . . . . . . . . . 56
3. 3. 2 Office 135 / Office 135pro . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
3. 3. 3 Office 160pro/Safeguard/ATEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
3. 3. 4 Aastra 610d / Aastra 620d / Aastra 630d . . . . . . . . . . . . . . . . . . . . . . . . . 62
3. 3. 5 Older cordless DECT system terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
3. 4 IP system terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
3. 4. 1 Hardphone Aastra 5360ip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
3. 4. 2 Hardphone Aastra 5370ip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
3. 4. 3 Hardphone Aastra 5380ip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
3. 4. 4 Options for Aastra 5360ip, Aastra 5370ip and Aastra 5380ip . . . . . . 68
3. 4. 4. 1 expansion keypads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
3. 4. 4. 2 Plug-in power supply unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
3. 4. 5 Office 1600/1600IP Softphones. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
3. 4. 6 Office 1560/1560IP Softphones. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
3. 4. 7 Aastra 2380ip Softphones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
3. 4. 8 Older IP system terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
3. 5 Various terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
3. 5. 1 SIP terminals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
3. 5. 2 OfficeSuite. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
3. 5. 3 Office eDial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
3. 5. 4 GSM terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
3. 5. 5 Corded Terminals by Other Manufacturers. . . . . . . . . . . . . . . . . . . . . . . 77
3. 5. 6 DECT Terminals by Other Manufacturers . . . . . . . . . . . . . . . . . . . . . . . . . 77
3. 6 Installing, connecting and configuring terminals . . . . . . . . . . . . . . . . . 79
3. 6. 1 AD2 system terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
3. 6. 1. 1 Office 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
3. 6. 1. 2 Office 25, Office 35, and Office 45/45pro . . . . . . . . . . . . . . . . . . . . . . . . . 82
3. 6. 1. 3 Aastra 5360, Aastra 5370, and Aastra 5380 . . . . . . . . . . . . . . . . . . . . . . . 85

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3. 6. 2 DECT terminals Office 135/135pro, Office 160pro/Safeguard/ATEX . .
and terminals of the family Aastra 600d . . . . . . . . . . . . . . . . . . . . . . . . . .87
3. 6. 3 IP system terminals Aastra 5360ip, Aastra 5370ip, Aastra 5380ip. . .88
3. 6. 4 Office 1560/1560IP, Office 1600/1600IP,
OfficeSuite and Office eDial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90
3. 6. 5 Aastra SIP terminals Aastra 6751i, Aastra 6753i,
Aastra 6755i and Aastra 6757i . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90
3. 6. 6 Integration of GSM terminals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90
3. 7 Malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97
3. 7. 1 Malfunctions of the terminals in general. . . . . . . . . . . . . . . . . . . . . . . . . .97
3. 7. 2 Malfunctions of the DECT handsets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98
3. 7. 3 Malfunctions of the DECT charging bays. . . . . . . . . . . . . . . . . . . . . . . . . .98
3. 8 Operation of the system terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
3. 8. 1 Digit key assignment on system terminals . . . . . . . . . . . . . . . . . . . . . . 100
3. 8. 2 Alphanumerical keyboard (AKB). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
3. 8. 3 Alpha keyboard Aastra 5380/5380ip. . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
3. 8. 4 Function commands (macros). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
4 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
4. 1 Network interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
4. 2 Terminal interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
4. 3 System terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

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1 Safety Information
This chapter provides you with information about Ascotel® IntelliGate® products and
the symbols used in this document.
1. 1 About the products
Purpose and function
Ascotel® IntelliGate® is an open, modular and comprehensive communication sys-
tem that comprises the IP PBX, a multitude of expansion cards and modules, and a
complete series of system terminals including IP system terminals.
The system and all its parts were designed to cover the full spectrum of communi-
cation requirements of businesses and organizations using a single convenient so-
lution. The individual parts of the system as a whole are coordinated and must not
be used for other purposes or replaced by outside parts (unless for the connection
of other approved networks, applications and terminals to the interfaces provided
specially for that purpose).
Data protection
Unencrypted phone calls made in the IP network can be recorded and played back
by anyone with the right resources. You should therefore prioritise the use of sepa-
rate leased lines for WAN links or encrypt the IP packets, for instance using VPN (Vir-
tual Private Network).
Trademarks
Ascotel® and IntelliGate® are registered trademarks of Aastra Technologies Limited.
All other trademarks are trademarks of their respective proprietors.

Interfaces and Terminals as of I7.8
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User information
Your system and individual components ship with safety instructions, product in-
formation and (quick) user’s guides. Other device-specific information may also be
supplied. You can find these documents and up-to-date versions of all the system
manuals available for this system at http://www.aastra.com/docfinder. More infor-
mation on your device can be found at http://www.aastra.com or in your dealer’s
documentation and homepage.
It is your responsibility to acquaint yourself with the functional scope, operation
and proper use of both the system and its components.
•Check to ensure that you have all the user information available for your device,
that it corresponds to your version of the system and its components, and that it
is up-to-date.
•Read the user information carefully before configuring your system and putting
it into operation.
•Keep the user information at hand and refer to it whenever you are in doubt
about how to operate the system or its components.
•If you pass on your system or its components to others, make sure you enclose
the accompanying user information.
Exclusion of Liability
Ascotel® IntelliGate® was manufactured in accordance with ISO 9001 quality guide-
lines. The relevant user information has been compiled with the utmost care. The
functions of the product and of all part products have been checked and released
as a result of extensive approval tests. Nonetheless errors cannot be entirely ex-
cluded. The manufacturers shall not be liable for any direct or indirect damage that
may be caused by incorrect handling, improper use, or any other faulty behaviour
on the part of a product. Potential areas of particular risk are signalled in the appro-
priate sections of the user information. Liability for loss of profit shall be excluded
in any case.

Interfaces and Terminals as of I7.8
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1. 2 About this document
This document describes the interfaces of Ascotel® IntelliGate® 2025/2045/2065
and Ascotel® IntelliGate® 150/300 as well as the terminals that can be connected to
these two systems. It is intended for planners, installers and system managers of
telephone installations. A basic knowledge of telephony, in particular of ISDN and
IP technology, is required to understand the content of the System Manual.
The features, installation, configuration, expansion stages and system limits, the
operation and maintenance, the DECT planning, and the possibilities for network-
ing several systems into a private network (PISN) or an Ascotel® IntelliGate® Net
(AIN) are not part of this Manual. They are described in separate documents.
The System Manual is available only in electronic form as a document in Acrobat
Reader format, and can be printed out. Navigation in PDF format is based on the
bookmarks, table of contents, cross references and index. All these navigation aids
are linked, i.e. a mouse click takes you directly to the corresponding places in the
Manual. We have also ensured that the page numbering in the PDF navigation cor-
responds to the page numbering of the Manual, making it much easier to jump to a
particular page.
Referenced menu entries and parameters appearing on terminal displays or in
AIMS (Ascotel® Information Management System) are highlighted in italics and in
colour for a clearer orientation.
Document information
• Document number: syd-0239
• Document version: 2.4
• Valid for systems as of: I7.8
• © 07.2009
• Download document:
https://pbxweb.aastra.com/doc_finder/DocFinder/syd-0239_en.pdf?get&DNR=syd-0239

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1. 3 Considerations
Safety Considerations
Special hazard alert messages with pictograms are used to signal areas of particular
risk to people or equipment.
Hazard
Failure to observe information identified in this way can put people and
hardware at risk through electrical shock or short-circuits respectively.
Warning
Failure to observe information identified in this way can cause a defect to
the product or to a module.
Warning
Failure to observe information identified in this way can lead to damage
caused by electrostatic discharge.
General Considerations
Special symbols for additional information and document references.
Note
Failure to observe information identified in this way can lead to equip-
ment faults or malfunctions or affect the performance of the system.
Tip
Additional information on the handling or alternative operation of equip-
ment.
See also
Reference to other chapters within the document or to other documents.
Ascotel® IntelliGate® Net:
Particularities that have to be observed in an AIN.

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2 System Interfaces
Tab. 1 System interfaces and channels
Term Explanation
B channel User information channel: Each connection occupies one user infor-
mation channel, e.g. 2 user information channels (connections) can be
occupied simultaneously using one basic access.
D channel Control and signalling channel: Channel for control and signalling as
well as for packet data transfer.
2B+D / 30B+D 2 2 B channels and 1 D channel / 30 B channels and 1 D channel
Ports Physical connection points on the PBX for network interfaces and ter-
minal interfaces
Network interfaces Network-side connection possibilities for the PBX
• Basic Access T Digital network interface 2B+D
• Basic access S external Digital network interface 2B+D:
A terminal interface S configured as EXTERN.
• Primary rate access T2 Digital network interface 30B+D
• SIP access via the Ethernet interface
on the basic system
For connection to one or more SIP providers. An SIP access contains a
maximum of 30 channels.
• Analogue network interface
(a/b network interface)
An analogue network connection has 1 user information channel.
Terminal interfaces Terminal-side connection possibilities for the PBX
• ISDN terminal interface
(terminal interface S)
Digital terminal interface 2B+D:
Connection for Euro ISDN terminals, Terminal Adapters and ISDN PC
cards.
• AD2 terminal interface
(AD2 terminal interface)
A maximum of two AD2 system terminals, one system terminal and a
Pocket Adapter, or one DECT radio unit can be operated on a proprie-
tary AD2 bus.
• IP terminal interface
(via Ethernet Interface)
Digital user-network interface for linking up IP system terminals and
SIP terminals (soft- and hardphones).
• Analogue terminal interfaces
(a/b terminal interface)
An analogue terminal connection has 1 user information channel.
Special interfaces Other PBX connection possibilities
• Ethernet interface on the basic sys-
tem
Central interface for connecting AIMS, a CTI server, IP system termi-
nals, SIP terminals or for the network-side connection to SIP service
provider.
• Ethernet interface on the expansion
card AIP 6400
Interface to an IP network for networking Ascotel® systems via QSIG
• Ethernet interfaces on the expan-
sion card AIP 6500
Interface to an IP network to implement an Ascotel® IntelliGate® Net
and to connect IP and SIP terminals
• V.24 interfaces Serial data interface
• Door Intercom Systems Special interface for connecting door intercom systems
• General Bell Special interface for general bell

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2. 1 Network Interfaces
The system supports the following types of network interfaces:
•Basic access T for connection to
– the public ISDN network
– the private leased-line network
•Basic access S external for connection to
– the private leased-line network
– a terminal with its own direct dialling plan (DDO)
•Primary rate access T2 for connection to
– the public ISDN network
– the private leased-line network
•SIP access via the Ethernet interface on the basic system for connection to SIP
service provider.
•Analogue network interface for connection to the public analogue network

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2. 1. 1 Basic Access Variants
A basic access is a digital network interface for connection to the public network or
to the private leased-line network. It can be set for the protocols DSS1 (public ISDN
network) and QSIG / PSS1 (private leased-line network).
A basic access has two 64 kbit/s user information channels and one 16 kbit/s con-
trol and signalling channel (2B+D).
One call or data connection can be set up on each bearer channel (B channel) si-
multaneously and independently of the other B channel.
A basic access can be barred for outgoing calls (Outgoing Calls Barred setting).
Basic accesses for connecting the PBX to the public network can be operated as
point-to-point and, with some network providers, also as point-to-multipoint (mul-
tiple subscriber number) access.
There are two types of basic access:
•Basic Access T
•Basic access S external
2. 1. 1. 1 Basic Access T
Basic access T is suitable for connection to both the public ISDN network and the
private-leased-line network.

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2. 1. 1. 2 Basic Access S External
The basic access S external is an S interface configured as external (S-bus protocol =
EXTERNALS setting in the interface configuration).
The basic access S external is designed for the following purposes:
•For connection to the private leased-line network or
•For connecting DSS1 terminal equipment, which evaluates the DDI number sent
by the PBX and routes the call accordingly (e. g. a fax server, see also "Direct Dial-
ling Out (DDO)", page 20)
Fig. 1 S external in a private leased-line network: PINX-PINX connection
Fig. 2 S external in a DDI configuration
Note:
An S interface configured as external is a fully-fledged network interface
and is no longer available as a user-network interface. A basic access
S external cannot be used as a connection to the public ISDN network.
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Interfaces and Terminals as of I7.8
System Interfaces 13
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2. 1. 1. 3 Point-to-Point and Point-to-Multipoint Connections
Basic accesses can be configured as point-to-point or as point-to-multipoint (TEI
Management setting in the configuration of the network interfaces).
Point-to-Multipoint Connection without a PBX
The basic access in point-to-multipoint configuration allows a selective dial-up of
the terminals connected in parallel using MSN, the Multiple Subscriber Number.
Here the network itself provides a kind of direct dialling, so to speak.
NT1: Network Termination
MSN: Multiple Subscriber Number
Fig. 3 Single basic access in point-to-multipoint configuration
Note:
The fax with ISDN connection is implemented as a fax card in a PC.
Initialization setting:
Digital network interfaces are set on point-to-point configuration.
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Interfaces and Terminals as of I7.8
14 System Interfaces
syd-0239/2.4 – I7.8 – 07.2009
Point-to-Multipoint Connection with PBX
If a PBX is connected using point-to-multipoint, a direct dial number must be cre-
ated for each MSN number, with all the digits of the MSN number.
NT1: Network Terminal
MSN: Multiple Subscriber Number
U/T: ISDN reference point
AD2: digital terminal interface AD2
a/b: analogue terminal interface
Fig. 4 Basic access in point-to-multipoint configuration, with single-digit direct dial and parallel ter-
minal
Combinations are also possible in the case of several lines, e.g. one line in point-to-
multipoint configuration and the remaining in point-to-point configuration.
Note:
If terminals (e. g. MSN1) are connected in parallel on the T interface, Colli-
sion Detection has to be activated as the PBX and the terminal influence
each another. This also applies in cases where a/b connections are used
on NT1.
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Interfaces and Terminals as of I7.8
System Interfaces 15
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Point-to-Point Connection without Direct Dial
Without direct dialling in, only one call number is available. The individual PBX us-
ers can only be reached indirectly via the number.
This variant is suitable above all for systems with primarily outgoing traffic.
NT1: Network Terminal
U/T: ISDN reference point
AD2: digital terminal interface AD2
S: terminal interface S
a/b: analogue terminal interface
Fig. 5 Several basic accesses with line group in point-to-point configuration, without direct dial
number
Note:
Do not connect any terminals between the NT1 and the PBX.
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Interfaces and Terminals as of I7.8
16 System Interfaces
syd-0239/2.4 – I7.8 – 07.2009
Point-to-Point Connection with Direct Dial
With direct dial the individual PBX users can be reached directly via their direct dial
number.
NT1: Network Terminal
DDI: Direct dialling
U/T: ISDN reference point
AD2: digital terminal interface AD2
S: terminal interface S
a/b: Analogue terminal interface
Fig. 6 Several basic accesses in point-to-point configuration, with direct dial number
Note:
Do not connect any terminals between the NT1 and the PBX.
Periodic Reactivation of Layer 2 on the T-Interface1)
Layer 2 of the T network interface can be reactivated periodically every three min-
utes so that incoming calls are not rejected already at the local exchange after po-
tential temporary interruptions in the U-interface. To do so, configure the parame-
ter L2 reactivation of the T network interface to special.
Note:
In some countries T network interfaces are deactivated once a certain
amount of time has elapsed without traffic, and are only reactivated
when the PBX once again requests a connection.
1) Only in Germany and Austria.
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Interfaces and Terminals as of I7.8
System Interfaces 17
syd-0239/2.4 – I7.8 – 07.2009
2. 1. 2 Primary Rate Access T2
A primary rate access is a digital network interface for connection to the public net-
work or the private leased-line network. It can be set for the protocols DSS1 (public
ISDN network) and QSIG / PSS1 (private leased-line network).
A primary rate access has thirty 64 kbit/s user information channels and one 64
kbit/s control and signalling channel (30B+D). One call or data connection can be
set up on each bearer channel (B channel) simultaneously and independently of
the other B channel.
Note:
Primary rate accesses can only be used as point-to-point connections.
NT1: Network Terminal
U2/U/T2/T:ISDN reference points
30B+D: Primary rate access channels
2B+D: Basic access channels
AD2: digital terminal interface AD2
S: terminal interface S
a/b: analogue terminal interface
Fig. 7 System with basic and primary rate accesses
Fig. 8 Primary rate access in a private leased-line network: PINX-PINX connection
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Interfaces and Terminals as of I7.8
18 System Interfaces
syd-0239/2.4 – I7.8 – 07.2009
2. 1. 2. 1 Clock synchronization
The clock frequency of a PBX is provided (synchronized) by the public network via
the basic accesses T and the primary rate accesses T2.
Should synchronization by the public network fail (due, for example, to exchange
line interruptions), the PBX will use its own clock. This frequency deviates at most
by 5 ppm from the nominal value, which ensures that the Ascotel® DECT system
also remains available.
In a private leased-line network, PINXs that are synchronized by the public network
pass on the clock reference to PINXs that are not connected directly to the public
network.
Synchronization in the private fixed network has to be carefully planned to ensure
there are no synchronization loops (see "PISN/QSIG networking" System Manual,
"Synchronization" Chapter).
All the private leased-line network connections and public exchange line circuits
are automatically in a shared clock reference table when the PBX is configured for
the first time.
If a PBX is not networked in a PISN, the clock reference table can be left as it is; only
the initial reference may have to be assigned differently.

Interfaces and Terminals as of I7.8
System Interfaces 19
syd-0239/2.4 – I7.8 – 07.2009
2. 1. 2. 2 Digital down-circuit connection of a PBX with QSIG
If a down-circuit Ascotel® PBX is connected with an up-circuit PBX via digital lines
(T, T2), all the features as per QSIG are available providing the up-circuit system
supports the QSIG protocol.
The down-circuit PBX is configured in accordance with the rules for networked
PBXs.
The up-circuit ISDN PBX has a connection to the public network. It can also be an
Ascotel® or a third-party product, provided it supports the QSIG protocol.
As a rule the down-circuit PBX is connected with the up-circuit PBX via its own fixed
lines. Depending on the PBX type the interfaces can be basic accesses (T) or pri-
mary rate accesses (T2). Connections on an S external-type interface are also possi-
ble instead of connections on a T interface, providing at least one T interface is
available for synchronization via the ISDN network.
Example: Down-circuit connection of a PBX with cordless system
Fig. 9 Digital down-circuit connection with QSIG
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Interfaces and Terminals as of I7.8
20 System Interfaces
syd-0239/2.4 – I7.8 – 07.2009
2. 1. 2. 3 Direct Dialling Out (DDO)
If a fax server is connected to an S bus, individual fax receivers allocated a DDI
number can be specifically addressed. In terms of routing technology, this corre-
sponding to a DDO (Direct Dialling Out) function.
The fax server forwards the incoming faxes via e-mail to the relevant PC stations
that are set up as fax receivers.
Fig. 10 Direct Dialling Out (DDO) to a fax server
Due to the configuration of the S interface as EXTERNALS and the use of the DSS1
protocol, the fax calls can be routed via routes and trunk groups. This means that all
fax receivers that have been allocated a DDI number can be reached via a single S
interface
See also:
"Call to DSS1 Terminal Equipment on the S Bus (DDO)" Chapter in the
"System Functions and Features" System Manual
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