sundance-communications.com Forums Telephony Discussion Phone & VoIP Systems NEC Telephones & Systems Line assignment on a Elite 48

I am having trouble figuring this one out. I am working on an Elite 48 for a new client. It has 4 lines. Line keys 1-4 are labelled line 1 thru line 4. The third line key is dead, no dial tone. Now I am new to NEC but if I read the manual correctly the system will assign the lines to the line keys based on the number of lines defined in trunk group 0. All phones have a dead line 3 button. There is dial tone on CO3 on the block.

Has anyone done programming recently, and especially, has the customer done programming on his own?

check MB 4-12 (key assignment) and make sure that the keys on the phones are line 3, and haven't been changed to something else.

Then, swap CO2 and CO3 at the block. If the line 2 button goes dead on the phones, then there is a problem with the CO line 3 itself. If CO3 remains the bad line, then the problem is either programming or a bad port on the card. If the problem goes away entirely, CO3 was punched down incorrectly.

If possible, swap a COI4 card. If the problem goes away, the removed card is bad; if the problem remains, there's a programming issue.

Check your CO programming under LK3.

Nobody has touched it in 5 years, certainly not the owners. Thanks for the help. I'll check that MB. I'm slowly getting to know this beast. I assume it's an easy matter to say put line 5 on that third line key if line 3 is dead. Which is what I suspect at the moment. Studying the manual some more for now.

Cards are usually 4 or 8 ports. If the COI card is a 4-port, and you have a dead port, then you may have to replace the card.

If it's 8-port, then swapping to port 5 and changing the phone programming is easy.

for what it's worth, the B2-48 is a powerful and flexible little system. Its big brothers, the 192, IPK, and IPK 2, were also very impressive for key systems.

OK they have an 8 port COI card. I verified dial tone at the CO side of the block. I then went into MB 4-12 and assigned L03 to CO 5 and saved the change. Then I punched TELCO line 3 onto CO line 5 on the block. Dead as a doornail. So I hung my tone on line 8 and assignd L08 to line 8 to test. I could not hear the tone. So then I decided to call in on that CO 3 number. It will ring to the extensions and they can pick up. So I can dial in on that line but I cannot use it to dial out. Could there be some kind of restriction on line 3? The business owners say they never had anyone program such a restriction.

Looks like trouble is on provider's side. I believe line is grounded that is why you have a ring but can't answer it and draw a DT. Had the same Yesterday on DSX.

These are FIOS lines. I can dial out using a butt set. What would be the quickest way to just remove all restrictions? Would a default be in order?

I would not default.

I'd go through all the 3- memory blocks, and compare CO3 to CO2. It sounds like either a programming issue or a port count issue.

Remember that the B2-48 support a max of 32 phones and 16 CO's so count CO's (is there another card?) and count total ports ( must be <48 ).

Sounds like co 3 and co4 are in different trunk groups. Check MB 3-03 and make co3 a 1. It is probably a 0 right now.

I finally made it over to the NEC site. I checked and CO3 is assigned to trunk group 1. I fixed several minor issues so now only one remains. LK3 is assigned to CO3. Any incoming call on CO3 will ring at all phones and you can pick up the call. You cannot dial out on CO3. In fact when you press he LK3 button you do not even get the dead air sound you get on any LK button without a live CO line. I tried copying trunk config from CO1 to CO3 and that did not help.