Gatekeeper Mandatory Functions
Here are the mandatory functions that a GK must observe:
- Admission Control
- Address Translation
- Bandwidth Control
- Zone Management
Gatekeeper Port
Here are the different port that the Gatekeeper will use for specific traffic :
- UDP/1718 Traffic between Gatekeeper
- UDP/1719 Traffic used by H323 devices to register with the Gatekeeper
- TCP/1720 Call Control
PSTN Emulator
Hi ,
Just thinking how can we make a pstn emulator in a lab …. First thought is to use a CME router with several T1/E1 , BRI cards to distribute PSTN connection back-to-back to all locations …..
Need to think about it !!!
Maintaining Class of restrictions under SRST and CCME
Very good article on how to maintain the CSS under the SRST mode but it is also true for CCME Config .
http://www.blindhog.net/maintaining-class-of-restriction-during-srst/
Power of Alias command
In Cisco IOS , you have the option to put in place your own command with the command alias .
Don’t be shy to use it as it can be fun for the long expression or command that you have problem to remember / to type .
Here are some examples :
!
alias configure ns no shut
alias exec scavb show call active voice brief
alias exec sdvs show dial-peer voice summary
!
G711ulaw / G711alaw Asymetric choice for fax issues on VG224 configurations
On VG224 , you can choose asymetric G711 codec with the voice service voip command for the fax issues.
voice service voip
!
modem passthrough nse codec g711alaw
!
The modem passthrough commands will determine the G711 mode used for outbound calls
But the following part of config will determine the codec use for inbound calls :
!
dial-peer voice 15 voip
description <=== avoid PVID 0 in VG224 ==>
answer-address .
modem passthrough nse codec g711ulaw
session target ipv4:<<loopback_address>>
!
So in our case , the incoming calls will considered in g711ulaw and outgoing calls will be treated as g711ulaw