Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
New Member

CISCO 1751V WITH SRST

What should be the minimun required bandwidth to control a remote gateway Cisco 1751 with 2 fxs / 2 fxo ports and SRST feature in a remote location from a central hub with CallManager 3.3?

Thanks!

Gustavo.

1 REPLY
Silver

Re: CISCO 1751V WITH SRST

Check the below link which shows hot to configure

http://www.cisco.com/en/US/tech/tk652/tk698/technologies_tech_note09186a0080094ae2.shtml

Voice Payload Calculation:

20Msec voice sample * 8Kbps (for g729)/8 bits/byte = 20bytes

Packet Size Calculation:

20 byte payload + 6 or 7 byte Header = 26-27 bytes

(Frame Relay header is 6 or 7 bytes depending on the PVC number)

Bandwidth calculation:

26/27 b/voice packet * 8 bits/byte * 50 pps = 10.4 to 10.8 Kbps per call (Although I would say approx 12K per voice call)

112
Views
0
Helpful
1
Replies
CreatePlease to create content