Leasing a IP-PBX or using a Cloud-PBX services??

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5 years Leasing:

If your need 20 phones, and you want unlimited calls in US and Canada

Based on $ 7,000 IPItomy IP-PBX (voice quality CAN be 100% guaranteed):
60 months leasing: Rate Factor:0.0223, monthly payment: $ 7,000.00 x 0.0348  =   $  243.00/month
8 lines, SIP, unlimted call in US, Canada and 34 other international, $ 25.00 x 8 =   $  200.00/month
                                                                                                                Total        =   $  443.00/month
For 3 years, $ 356.00 x 36 months          =      $ 12,816.00
For 6-10 years, $ 200.00 x 60 months     =      $ 12,000.00
In 10 years, total                                                                                                                                                             =      $ 24,816.00

                                         
Cloud-PBX 20 free phones with 2 years contract (voice quality CAN NOT be 100% guaranteed)
20 phones x $ 25.00/phone/month with 20 lines (20 SIP trunks)                        =   $  500.00/month 
For 5 years, $ 500.00 x 60 months =               $ 30,000.00
For 6-10 years, $ 500.00 x 60 months =          $ 30,000.00
In 10 years, total                                                                                                                                                             =      $ 60,000.00                   

SIP trunk CAN NOT have 100% voice quality guaranteed due to using public Internet.
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3 years leasing:

If your need 10 phones, and you want unlimited calls in US and Canada

Based on $ 4,000 IPItomy IP-PBXpurchase (voice quality CAN be 100% guaranteed):
36 months leasing: Rate Factor:0.0348, monthly payment: $ 4,000.00 x 0.0348  =  $  139.00/month
4 lines, SIP, unlimted call in US, Canada and 34 other international, $ 25.00 x 4 =  $  100.00/month
                                                                                                                Total        =  $  239.00/month
For 3 years, $ 239.00 x 36 months          =      $   8,604.00
For 4-10 years, $ 100.00 x 84 months     =      $   8,400.00
In 10 years, total                                                                                                                                                             =    $ 17,004.00

                                         
Cloud-PBX10 free phones with 2 tears contract (voice quality CAN NOT be 100% guaranteed)
10 phones x $ 25.00/phone/month with 10 lines                                                 =  $  250.00/month   
For 3 years, $ 250.00 x 36 months         =       $   9,000.00
For 4-10 years, $ 250.00 x 84 months    =       $ 21,000.00
In 10 years, total                                                                                                                                                            =     $ 30,000.00                   

SIP trunk CAN NOT have 100% voice quality guaranteed due to using public Internet.
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If you want 100% voice quality guaranteed:

IPItomy: No problem by using analog lines module or T-1 PRI.
Cloud-PBX: Can not change voice qualityat all unless you use a private network (MPLS).
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If you want to have warehouse paging:

IPItomy: No problem. Adding an interface to existing paging system, done.
Cloud: can not do it.
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If you want to have an Auto Call Distribution (ACD)

IPItomy: has much more appropriate functions than cloud-PBX
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IF you are not sure for the next two years:

Please do Cloud-PBX.
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Note:     
Rate Factor for 36 months : 0.0348
Rate Facfor for 48 months : 0.0285
Subject to change without notice. Please call for details. Thank you.

Bundled free zone 1, 2 and 3 and 2,000 minutes for long distance calls in US in the original package.
After initial 2,000 minutes, $35.00/1,000 minutes or $ 60.00/2,500 minutes can be purchased.

System configuration based on 3 Mbps ( 2 "T1" ) for 12 SIP trunks and Internet    $   585.00/mon

System configuration based on 4 Mbps ( "T1 ++" ) for 16 SIP trunks and Internet  $   743.00/mon


"T1 + "= 2.0 Mbps
A clear voice bandwidth required: 160 Kbps per conversation.
     Example: If you have 5 people on the phone simultaneously, in oder to have a clear voice,
                    You need to have 5 x 160 Kbps = 0.8 Mbps bandwidth ready.
                    The rest bandwidth 1.2 Mbps (2.0 - 0.8) is for Interne


Bundled package including free local zone 1-3 and 2,000 minutes long distance in US:
2 Mbps for 8 SIP trunks and Internet when the site is applicable =    $   377.00/month
1.54 Mbps for 8 SIP trunks and Internet =                                                      $   388.00/month
3 Mbps for 12 SIP trunks and Internet =  $    585.00/month
4 Mbps for 16 SIP trunks and Internet when the site is applicable=   $    743.00/month
Cisco router for SIP trunks = $ 30.00, one time charge.