Cisco ISR G2 SIP Calls Capacity

[savio.ibrahim]

Dear all,

We're planning for Cisco Voice Gateway configuration with SIP trunk, till now no E1s are used.

I would like to know how can we calculate the number of simulataneous calls that a cisco ISR G2 router (1921. 2921.3945,etc...) can support ?

How much sip simultaneous calls each ISR G2 model can support ?

Is it better to use SIP or we must get into E1 PRI ?

Regards,

[Ayodeji Okanlawon · Accepted solution]

The Q and A below has the call capacity you are looking for

Table 1. Number of IP-to-IP Calls per Platform

Platform	Maximum Number of Simultaneous Calls (Flow-Through)
Cisco 3945E	2500
Cisco 3925E	2100
Cisco 3945	950
Cisco 3925	800
Cisco 2951	500
Cisco 2921	400
Cisco 2911	200
Cisco 2901	100
Cisco ASR 1004; and Cisco ASR 1006 Router Processor 2 (RP2)	5000; 16000*
Cisco ASR 1002, ASR 1004, and ASR 1006 RP1	1750
Cisco AS5350XM and AS5400XM	600
Cisco 3845	500
Cisco 3825	400
Cisco 2851	225
Cisco 2821	200
Cisco 2811	110
Cisco 2801	55

http://www.cisco.com/en/US/prod/collateral/voicesw/ps6790/gatecont/ps5640/prod_qas09186a00801da69b.html

Please rate all useful posts

"opportunity is a haughty goddess who waste no time with those who are unprepared"

[Jonathan Schulenberg]

Be careful not to make your decision solely based on the maximum concurrent calls. The far lower number is call [setup/teardown] per second. Keep in mind that Mobile Connect will significantly amplify this. Page 15 of the following document shows the details.

http://www.cisco.com/en/US/prod/collateral/routers/ps259/product_data_sheet0900aecd8057f2e0.pdf

Please remember to rate helpful responses and identify helpful or correct answers.

[Igor Lagovskiy]

Thanks for the very useful answer!

[azad.irfan@servion.com]

Hi  

We have 3 PVDM with 256. so how many calls can be handled by the Cisco 3945 and 2921 gateway.

Is it the same 950 calls or more?

Cisco CISCO3945-CHASSIS (revision 1.0) with C3900-SPE250/K9 with 1782784K/314368K bytes of memory.

8 Gigabit Ethernet interfaces
1 Virtual Private Network (VPN) Module
DRAM configuration is 72 bits wide with parity enabled.
256K bytes of non-volatile configuration memory.
2005920K bytes of ATA System CompactFlash 0 (Read/Write)

NAME: "Cisco Services Performance Engine 250 for Cisco 3900 ISR on Slot 0", DESCR: "Cisco Services Performance Engine 250 for Cisco 3900 ISR"

PID: C3900-SPE250/K9 , VID: V05 , SN:

NAME: "4 Port GE Non-POE EHWIC Switch on Slot 0 SubSlot 0", DESCR: "4 Port GE Non-POE EHWIC Switch"
PID: EHWIC-4ESG , VID: V01 , SN: 

NAME: "PVDM3 DSP DIMM with 256 Channels on Slot 0 SubSlot 3", DESCR: "PVDM3 DSP DIMM with 256 Channels"
PID: PVDM3-256 , VID: V01 , SN: 

NAME: "PVDM3 DSP DIMM with 256 Channels on Slot 0 SubSlot 4", DESCR: "PVDM3 DSP DIMM with 256 Channels"
PID: PVDM3-256 , VID: V01 , SN: 

NAME: "PVDM3 DSP DIMM with 256 Channels on Slot 0 SubSlot 5", DESCR: "PVDM3 DSP DIMM with 256 Channels"
PID: PVDM3-256 , VID: V01 , SN: 

NAME: "C3900 AC Power Supply 1", DESCR: "C3900 AC Power Supply 1"
PID: PWR-3900-AC , VID: V04 , SN:

NAME: "C3900 AC Power Supply 2", DESCR: "C3900 AC Power Supply 2"
PID: PWR-3900-AC , VID: V04 , SN:

1627684864 bytes available (426049536 bytes used).

[Mohammed al Baqari]

It depends on the codecs used and media resources

Use dsp calculator below to find out

https://www.cisco.com/c/en/us/applications/dsp-calc.html

**** remember to rate useful posts