The sample modem configuration files included in this appendix do not support these modems, so custom configuration files are necessary. Anchor Automation 2400E is
an example of such a modem.
If you experience unexplainable performance problems that may be due to Xon/Xoff characters, it is recommended that you upgrade your modem.
Ring Detection
Most | modems | produce an interrupt request each time they detect a ring signal. | ||||||||||||||
Some | modems | generate | an interrupt only | on | the | first | ring | signal | that | they | receive. | |||||
AT&T | DataPort | 2001 is an example of such a modem. |
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The | Service | Processor | uses | the | ring | interrupt | request to | count | the | number | of | rings | ||||
when Ring Indicate |
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interrupt | on | only the first ring, set Ring Indicate | start | on the | first ring. | |||||||||||
Otherwise, | you can choose | to | start | Ring | Indicate | any | ring | count. |
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Terminal Emulators
The Service Processor is compatible with simple ASCII terminals, and therefore compatible with most emulators. When a remote session is handed off from the Service Processor to the operating system, agreement between terminal emulators becomes important.
The | server's | operating system | will have | some | |||
also | have | a | commercially | available terminal emulation. It is important that the local | |||
and | host | computers select the | same or | compatible terminal emulators | so that the key | ||
assignments | and responses | match, | ensuring | successful communications and | control. |
For best formatting, choose line wrap in your terminal emulator setup.
Recovery Procedures
Situations | such | as line | noises | and | power | surges can sometimes | cause | your | modem | ||||||||||||
to | enter | an undefined state. When it is being used | for | ring indica | |||||||||||||||||
modem is initialized each time one | of these actions is expected. If | ||||||||||||||||||||
one | of | these | environmental | conditions |
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| after | your | modem has been initialized, it | |||||||||||
might be | necessary | to | recover | your | modem | to | a | known | state. |
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If | your | modem | communicates | correctly | with | remote | users, it is probably in control. It | ||||||||||||||
may be wise to occasionally | change | some | of | the | functional | settings | and | then | change | ||||||||||||
them | back, | just for | the sense | of | security | that | the | modem | is communicating, | and to | |||||||||||
ensure | it | has | been | initialized | recently. |
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182 RS/6000 Enterprise Server Model H80 Series User's Guide