I would like to upgrade my phone system to handle more incoming phone lines. I currently have CO1-C(4)-10 KTU card and CO1-C(2)-10 KTU smaller card. Does anyone know what I would need to handle another 4 incoming phone lines?
The NEC Electra Professional Level 1 has a maximum CO line capacity of 8 in any configuration. If you need more outside phone lines, you will need a different system. If you need to limit cost as much as possible, the cheapest avenue would be to upgrade to a used Electra Professional Level II. That way you can still use the same telephone instruments, but ALL cabinet hardware would be different. Also, you can only get to 8 outside lines if you have software level 3.00 or higher by using the COI-C(2A)-10 card. To verify which software version you have, I think you press FNC(3) on sta. 10 ( or the first station in the system). If that doesn't work, let me know, and we can access the system program to verify version number.
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If your main system cabinet (in some closet somewhere) is plastic, you have the NEC Electra Professional Level I system and the DND cancel procedure is <FNC>, 60, <FNC> when the phone is idle.
If your main system cabinet is metal, you have the NEC Electra Professional Level II system and the DND cancel procedure is <FNC>, 69, <FNC> when the phone is idle. You can also press "42" while hearing intercom dial tone. The most common cause of accidentally setting DND is by dialing "40" while hearing intercom dial tone (Level II system).There is a slim chance your main system is not the Electra Professional series. If either of the above do not work, let me know.
The telephone instrument you have can be used on the NEC Electra Professional Level I, and the Level II systems (and under some conditions the NEAX 2000 series). Codes for features are somewhat different based on the system. It is possible that your phone is in "Do-Not-Disturb" if other phones on your system actually ring when they are called via the intercom (on the Level I and Level II systems, initial intercom ring is a system wide setting). The cancel DND code is:
Level I system: with telephone idle, press <FNC>, dial 60, press <FNC>.
Level II system: with telephone idle, press <FNC>, dial 69, press <FNC>.
It is also possible that your ring volume is very low. To adjust, press <SPKR>, dial 601, then adjust volume using the up/down keys at the bottom of the phone (press <SPKR> when finished.
If your system is programmed to access an outside line when you press <SPKR>, you will need to press the <INTERCOM> button first.)
If your system is set for voice intercom, people calling your phone can make it ring by dialing a "1" after your intercom number.
If you do all this and your phone still won't ring on incoming calls, let me know and we'll have to go into system programming to correct it.
The Last Number Redial feature is invoked by pressing the <LNR/SPD> button then the "*" (asterisk). This is true whether you have the NEC Electra Professional Level I or Level II system. To know what other features are available depends on the system. If you know where your main control box (KSU-Key Service Unit) is, the Level I system has a plastic cabinet, the Level II system has the metal cabinet.
Call forward, off-premise is available on the NEC Electra Professional phone system if you have the Level II system (metal cabinet, not plastic) and you have system software level 700 (7.00) or higher. To get your system software level, press <FNC> - 3 from any display telephone when idle. The procedure to forward is (with phone idle): press <FNC> - dial 60, dial trunk access code (usually - 9), dial telephone number, press <FNC>. Additionally, your station class must be set to allow this feature (by default it is not allowed) and you may need trunk-to-trunk capability turned on in system programming (which is also, by default, not allowed). Hope that all helps.
If your question is what specific system you have, it is the NEC Electra Professional. If your main control box (called a KSU - Key Service Unit) is a plastic cabinet, you have the Level 1 system. If your KSU is metal, you have the Level II (2) system.
I am making the assumption that only line 1 has caller-ID. Both of my suggestions require services on the phone lines themselves, and not thru the phone system.
Line 1 needs features on the line to allow three-way calling. Then you would hit the Recall key after answering to send a Flash to the Central Office to dial the 2nd number. This takes the transfer away from the phone system and puts it on the CO. This requires more time and effort on the staff answering phones, and if a calls comes in while this is in progress, it's going to roll over to another number in the hunt sequence anyway.