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Service Hints & Tips |
Document ID: YAST-3NGLBB |
7845 ISDN Network Terminator Extended - Considerations for ISDN connections
Applicable to: World-Wide
General ISDN Pre-installation Considerations:
1. You must have a local telephone company that has ISDN available to your area.
2. The carrier may have a digital switch ,but, surprise, that switch may not be ISDN compliant, or it may not be compliant with the new national ISDN standards you need for the equipment you buy.
3. The local exchange carrier may be able to get ISDN to a switch for you but still be unable to supply a cable adequate to carry the digital information from the switch to you.
4. Everything above may be technically possible, but here may not be a tariff filed with the appropriate government regulatory authority allowing the carrier to connect ISDN to you.
5. And, finally, the switch may be right, the wires may work, and the tariff may be available, but the price to you may be horrendous.
Note: Germany uses EUROISDN and 1TR6 and WaveRunner and the NT1 are being used currently in much of Europe with both these systems. The newer standard is EUROISDN and is more prevalent.
Information Needed before beginning:
1. 1 or 2 SPIDs...
What is a SPID?
A SPID is an ISDN device identifier, much like a network address. Most of our customers will be given 2 SPID for their ISDN line. Depending on the telephone company and the switch type each SPID
will consist of 10-14 digits. These SPID usually consist of a their assigned telephone number, plus some other digits.
Examples:
9194372242 001
9194372241 0001
10 9194372248 00
2 .ISDN switch you are connecting to...
What is a switch?
A switch is the primary device for routing calls over the ISDN network.
3 major switch types:
DMS-100 NI1
5ESS NI1
5ESS Custom
NI-1 stands for National ISDN --> this is a standard for ISDN switches. Custom means that the firmware on the switch came about before NI-1.
Recommended settings for various switches:
DMS100 Single ISDN
ISDN Single Line Service
2B + D
Voice and circuit switched data access
Functional issue 2 (NI-1)
Two Terminal Devices ( SPID 1 and SPID 2 )
PIC of choice ( Long Distance Carrier )
SPID 1 (Waverunner):
Single Directory Number
Single Call Appearance
No EKTS
No Feature Groups
No Features
SPID 2 (Telephony):
EKTS with CACH
Primary Directory Number
At least one Additional Call Appearance ( key 2 )
5ESS Single Line Custom ISDN
ISDN Single Line Service
Multi Point ( Custom )
Two Circuit Switched Data Channels ( any )
One Circuit Switched Voice Channel ( any ) -- for use with SPID #2
Two terminal Devices (SPID 1 and SPID 2 )
PIC of choice ( Long Distance Carrier )
SPID #1 (WaveRunner):
Terminal type A
Single Directory Number
Single Call Appearance
No Feature Groups
No Features
SPID #2 (Telephone):
Terminal type C
EKTS with CACH
Call Appearance 1 (Primary Directory Number )
At least one Additional Call Appearance of Primary Dir. number ( key 2 )
Calling Party Number deliver in information element.
Some conceptual stuff needed before starting:
Does your ISDN device need 1 or 2 channels? If your device takes up 2 channels you will NOT be able to operate in extended mode.
What is extended mode?
Extended mode is a special feature of the IBM 7845 which allows to emulate an analog telephone with one B channel. In effect, allowing analog devices to use the ISDN line.
The SPID that you place into the 7845 is the channel that the analog emulation uses. The other SPID should be programmed into another ISDN device. A common customer mistake is to program the WaveRunner or some other device with the same SPID as the 7845 is using in extended mode.
The ring voltage of the 7845 in extended mode is not standard and below voltage. This means that some analog devices may not be able to understand if the line is ringing. Like the 7852-10 which can't pick up whether or not the line is ringing.
Devices that can operate with one B channel:
ISDN telephones
ISDN fax machines
IBM Waverunner
Devices that work with both channels:
Ascend ISDN routers
Intel Protel ISDN vidphone
Cisco ISDN routers
Programming the 7845
All commands or User inputs are accomplished by using an analog touch-tone telephone attached to the NT 7845. Responses or errors are generated on the 7845 using tones
Restore Factory Settings:
* 9 * 9 #
Set SPID:
* 9 9 SPID #
Set Primary Directory Number:
* 9 8 Directory Number #
Select Network Switch Type:
* 9 7 switch value #
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Switch type/versions |
Switch value |
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DMS-100 NI1 |
1 |
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5ESS NI1 |
4 |
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5ESS Custom |
5 |
Place NT Extended into Standard Mode:
* # 0
Place NT Extended into Extended Mode:
* # 9
If successful you should hear a dial tone. If not, repeat process.
Note: FYI...Recommended reference material concerning ISDN is "Using ISDN" by QUE.
Keywords: OBI 7845 ISDN 82G6060 Programming
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Hint Category |
Networking | |
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Date Created |
03-11-97 | |
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Last Updated |
18-03-99 | |
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Revision Date |
18-03-2000 | |
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Brand |
IBM Options | |
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Product Family |
Communication Adapters | |
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Machine Type |
ISDN | |
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Model |
7845001 | |
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TypeModel |
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Retain Tip (if applicable) |
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