Technical information

Frequently Asked Questions (FAQs)

Dial-in Access FAQs

Q34. How do I set up my ISDN ports for dial-in service?

A34. Refer to the manuals that came with your access device.

Q35. How do I correctly enter ISDN SPID and DN numbers?

A35. Obtain the SPID and DN numbers from your telco representative (write them

down verbatim in your manual for future reference) and enter the numbers in the

format shown in the CommPlete documentation set.

Q36. Can I swap the SPID between the two B channels on a BRI

line?

A36. Yes. for the Multi-Tech IWay Hopper and most other terminal adapters there is

either software (like the Configuration Utility for the IWay Hopper) or AT

commands that can be used to set up the SPID numbers. Typically one is called

the Data SPID or SPID 0 and the other is called the Voice SPID or SPID 1. The

SPID numbers received from the Telco can be entered into either SPID 0 or

SPID 1 and these SPID numbers can be swapped between Data (SPID 0) or

Voice (SPID 1).

Q37. My B channel rings BUSY when I place a voice call to it. Why?

A37. A B channel BUSY message could be caused by several things: 1) The central

office may not be able to accept placement of a call due to congestion. 2) Both B-

channels are already in use and neither channel can be "bumped" or

disconnected to allow the voice call. 3) The device may not be set up properly

(incorrect SPID numbers) and cannot set up a call on either B-channel. 4) The

BRI line may not be provisioned for voice calls and so the voice call is not

allowed. Check the SPID numbers, try the call again later, then check with your

telco representative.

Q38. In using ML-PPP for a 128K connection, do both B channels

have to be on the same BRI line?

A38. No, but you need two ISDN terminal adapters for those separate BRI lines, your

PC must have two serial ports, and your PC must support MultiLink PPP.

Basically, the handling of MultiLink PPP moves from the terminal adapter to the

PC. The PC is then responsible for setting up the 128K bps connection using the

two separate terminal adapters.

Q39. My BRI line displays the message NO-SERVICE. What’s

wrong?

A39. Refer to the troubleshooting section of the device, then call your telco service

representative.