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Maxing out 2900 routers with PRIs

I am looking at the 2900 series G2 routers to supply 6, 10 and 12 PRIs in one device. It looks to me that the 2901 can support up to 8 PRIs using (2) 256 PVDM3s and (4) vwic2-mft-2t1/e1. Will that work?

With that said the next step up would be the 2911 and it supports one one NM. Can I get the 12 PRIs if I use a NM-HD-2T1, an additional vwic2-mft-2t1/e1 and 4 PVDM2 modules? I was not sure about the mixing of the PVDMs when using the NMs.

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8 REPLIES
Hall of Fame Super Gold

Re: Maxing out 2900 routers with PRIs

That doesn't seem such a good idea to me. Why not using the AS5xxx that are designed, tested and telco proven for high density, reliable voice applications.

The ISR G1 or G2, are only general purpose routers and cannot do better than the above.

New Member

Re: Maxing out 2900 routers with PRIs

Can you help me find what hardware I would need for my situations mentioned above? I am looking and I am finding AS5300 and AS5400's in End of Sale later this year. I know that Cisco will not end of sale the entire series at one time but are their newer models that Cisco is producing? I am also having a hard time determining what comes in each bundle. I will be able to figure it all out but some guidence would go a long way.

New Member

Re: Maxing out 2900 routers with PRIs

Forgot to mention that the calls will be for incomming voice G711 and maybe an option of G729. They will be sent by SIP to an IVR. Possible calls back out to the PSTN. The max of future growth was stated to be 10 PRI so I am calculating for a max of 12 PRIs.

Hall of Fame Super Gold

Re: Maxing out 2900 routers with PRIs

Therer are many models, what's your budget ?


Please remember to rate useful posts clicking on the stars below.

New Member

Re: Maxing out 2900 routers with PRIs

I do not have the details on the budget. I have just been tasked with getting options.

Here is what I came up with. Please let me know if I am forgetting / overlooking anything. I am going with the idea that the bundle comes with the necessary cards and PVDMs in the AS5xxx. If that is not true then I have some more to add to these options.

AS5xxx option for 8 PRIs

ProductDescriptionQuantity
AS54XM-8T1-V-MCAS5400XM Voice Med-Comp w/ 8T1,6 AS5X-PVDM2-64,IP+ IOS1
S54CK9-12415TCisco AS5400 Ser. IOS IP PLUS IPSEC 3DES1
CAB-ACAC Power Cord (North America), C13, NEMA 5-15P, 2.1m2
MEM-1024M-AS5XMAS5350XM and AS5400XM 1GB Main SDRAM1
AS54-DFC-8CT1AS5400 Octal T1/PRI DFC card1
AS54XM-AC-RPSAS5400XM AC Redundant Power Supply1
CAB-DFC-OCTAL-3MF3 Meter 8 PRI DFC Cable - Female RJ451
MEM-128CF-AS5XMAS5350XM and AS5400XM 128M Compact Flash1
AS5X-FCAS5000 Feature Card with Six PVDM DSP Module Slots1
AS5X-PVDM2-64AS5000 64-Channel Packet Voice/Fax DSP Module6


2900 option for 8 PRIs

ProductDescriptionQuantity
C2901-VSEC/K9Cisco 2901 Voice Sec. Bundle, PVDM3-16, UC and SEC License P1
MEM-2900-512U2.5GB512MB to 2.5GB DRAM Upgrade (2GB+512MB) for Cisco 2901-29211
VWIC2-2MFT-T1/E12-Port 2nd Gen Multiflex Trunk Voice/WAN  Int. Card - T1/E14
PVDM3-256256-channel high-density voice and video DSP module1
PVDM3-16U256PVDM3 16-channel to 256-channel factory upgrade1
CAB-ACAC Power Cord (North America), C13, NEMA 5-15P, 2.1m1
CAB-CONSOLE-USBConsole Cable 6 ft with USB Type A and mini-B1
S29UK9-15001MCisco 2901-2921 IOS UNIVERSAL1
PWR-2901-ACCisco 2901 AC Power Supply1
ISR-CCP-EXPCisco Config Pro Express on Router Flash1
MEM-CF-256MB256MB Compact Flash for Cisco 1900, 2900, 3900 ISR1
SL-29-IPB-K9IP Base License  for Cisco 2901-29511
SL-29-SEC-K9Security License  for Cisco 2901-29511
SL-29-UC-K9Unified Communication  License  for Cisco 2901-29511

AS5xxx option for up to 16 PRIs

ProductDescriptionQuantity
AS54XM-16T1-384-VAS5400XM Voice; 16T1, 384 DSPs, AC RPS, IP+ IOS1
S54CK9-12415TCisco AS5400 Ser. IOS IP PLUS IPSEC 3DES1
CAB-ACAC Power Cord (North America), C13, NEMA 5-15P, 2.1m2
MEM-1024M-AS5XMAS5350XM and AS5400XM 1GB Main SDRAM1
MEM-128CF-AS5XMAS5350XM and AS5400XM 128M Compact Flash1
AS5XM-VUFC-108NPAS5000XM 108 Voice/Universal Port Feature Card3
AS54-DFC-8CT1AS5400 Octal T1/PRI DFC card2
AS54XM-AC-RPSAS5400XM AC Redundant Power Supply1
CAB-DFC-OCTAL-3MF3 Meter 8 PRI DFC Cable - Female RJ452
AS5XM-VUFC-60NPAS5000XM 60 Voice/Universal Port Feature Card1
FR5X-AGREEMENT-LICAS5000 Software License Agreement1


I still have not confirmed that the 2921 will work with PVDM3s on board and PVDM2s in the modules so I am not providing that info yet.

Hall of Fame Super Gold

Re: Maxing out 2900 routers with PRIs

When you will see the prices of these, you will understand how important budget is in deciding.

I cannot help without knowning it, also because buying new, latetest model is not the only alternative that one have.

New Member

Re: Maxing out 2900 routers with PRIs

I had not considered them. In fact I did not know about them, thanks for bringing them to light. I will have to

check prices and pros/cons.

Hall of Fame Super Gold

Re: Maxing out 2900 routers with PRIs

You are welcome, please remember to rate useful posts clicking on the stars below.

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