Multitech MTA128ST-USB Uživatelská příručka Strana 50
- Strana / 66
- Tabulka s obsahem
- ŘEŠENÍ PROBLÉMŮ
- KNIHY
Hodnocené. / 5. Na základě hodnocení zákazníků
Appendices
MTA128ST/NT 50
Bearer Service
The options of Circuit Switch Voice Bearer (CSV) and Circuit Switch Data Bearer (CSD) are broad
categories of Bearer Services that the phone companies can provide. Different bearer services provide
different types of guarantees about the reliability and synchronization of the data. There are currently ten
different bearer services for circuit-mode, and three services for packet mode.
These bearer services are defined in terms of a number of attributes, which include mode (circuit or
packet), structure (bit-stream or octet-stream), transfer rate (e.g. 64Kbps), transfer capability (basically, the
content, for instance speech, 7Khz audio, video, or unrestricted), and several other attributes that specify
protocols to use and other things.
The attributes of the bearer service are encoded into a Bearer Code, or BC, that is sent everytime a new
connection is being set up. In theory, this allows the switches to dynamically choose from a variety of
different switching paths techniques depending on requirements. In practice, the SPID is used to
determine what services are needed for switching, as this greatly simplifies things for the telephone
companies. The Bearer Code will not be completely ignored, however there are certain bearer services
that will be unavailable on your B-channels, based on how they are configured. It is important to note that
the Bearer Code is sent to the switch every time a connection is established. However, the SPID is only
sent to the switch when you physically attach your equipment to your phone line. At this time the switch
gives your device a Terminal Equipment Identifier (TEI) which is used from then on to identify all
connection requests from that piece of equipment. This allows the switch to look at the TEI and Bearer
Code, determine the SPID, and see if the Bearer Code and the SPID match up.
Using ISDN Ordering Codes (IOCs)
An organization called
ISDN Solutions Group
, made up of ISDN service providers and equipment
vendors, was formed to simplify the often complex task of ordering an ISDN line. This method, supported
by most (but not all) service providers, uses ISDN ordering codes to define the ISDN line configuration.
Your ISDN TA has been tested to operate with the following ordering codes: B1, Capability C, Capability
R, I2, J2, J3, Capability S, and M5, as described in the following sections.
B1 (previously "Generic Data B")
This ISDN line ordering code supports:
• 1B Service,
• Data only on 1 B channel, and
• One directory number.
Capability C (previously "Generic Data C")
This ISDN line ordering code supports:
• 1B Service,
• Alternate voice and data on one B channel, and
• One directory number.
Capability R (previously "Generic Data I")
This ISDN ordering code supports:
• 2B Service,
• Data only on each B channel, and
• Two directory numbers.
Applications for Capability R include:
• 115.2K or 128K bps data only (no voice capability, and
• Generic 115.2K/128K bps data transfer applications (including remote access and LAN/WAN
connectivity and telecommuting).
- User Guide 1
- Models MTA128ST and MTA128NT 1
- Contents 3
- Product Description 4
- Features 5
- Introduction and Description 6
- LED Indicators 8
- Technical Specifications 10
- Safety Warnings 11
- Connecting your TA 11
- Hardware Installation 12
- Introduction 13
- Before You Start 13
- Call Control Configuration 14
- Configuration Utilities 15
- Configuring your TA 17
- AT Commands 26
- AT Commands by Function 27
- MTA128ST/NT 28 28
- S-Registers 29
- MTA128ST/NT 30 30
- Result Codes 31
- TERSE VERBOSE DEFINITION 31
- Making a Call 32
- Answering a Call 33
- Hanging Up 33
- Chapter 5: Troubleshooting 34
- Troubleshooting 35
- Apple Macintosh Compatibility 40
- Making PPP/MLPPP Connections 41
- PPP/MLPPP 42
- Warranty 44
- Online Warranty Registration 45
- Replacement Parts 46
- Technical Support 47
- Quick Setup Factory Profiles 48
- Quick Setup Example 48
- Loop Qualification 49
- Bearer Service 50
- Appendices 51
- Ordering ISDN Without IOCs 52
- Canadian Limitations Notice 57
- Configuration via AT Commands 58
- Glossary 59
- Canadian Regulation 56 65
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