Voice - IAmJoost.com

No more CCIE Voice !

February 3, 2016 by Joost van der Made

I passed my CCIE Voice lab in feb 5th 2008. In 2014 Cisco changed the CCIE Voice into CCIE Collaboration, which was a logical step for them to do. Before feb 16 2016 you could change your CCIE Voice into CCIE Collaboration if you passed the 400-051 written (or Collab lab) and create a case … Read more

MGCP Flows

September 10, 2021December 26, 2015 by Joost van der Made

It’s something I didn’t do in many many years, that’s why I create this post. Just for me to find all the information for the next time when I will have to configure MGCP.

MGCP Verbs :

Command	Message Name	Sent By	Description
AUEP	AuditEndpoint	CallManager	Get the status of a given endpoint.
AUCX	AuditConnection	CallManager	Retrieves all the parameters associated with a connection.
CRCX	CreateConnection	CallManager	Creates a connection between two endpoints.
DLCX	DeleteConnection	Both	From CallManager:Terminates a current connection. From Gateway:Indicates that a connection can no longer be sustained.
MDCX	ModifyConnection	CallManager	Changes the parameters (Update info) associated with an established connection.
RQNT	NotificationRequest	CallManager	Instructs the gateway to watch for special events such as hooks or DTMF tones. It is also used to instruct the gateway to provide a signal to the endpoint (for example, dial tone and busy tone).
NTFY	Notify	Gateway	Informs the Cisco CallManager when requested events occur.
RSIP	RestartInProgress	Gateway	Informs the Cisco CallManager that an endpoint or group of endpoints are taken out or placed back into service.
EPCF	Endpoint configuration	Callmanager	Alert configuration of the endpoint(things like gain level, codec, etc

Verify the CUCM DB Replication

November 13, 2020December 25, 2015 by Joost van der Made

So you got a Publisher and a Subscriber. And how do you know that they are on the same page ? Is the DB Replication working correctly ?

To verify the DB Replication status you can use :

Real Time Monitoring Tool
CLI
System Reports.

RTMT :

Everything was running fine until the Sub died.

SIP & SCCP Phone flow CUCM

November 13, 2020December 18, 2015 by Joost van der Made

Here are some flows of a SIP & SCCP phone call. My purpose was to see is it really only digit-by-digit dialing even when the phone is on hook.

SCCP

on-hook dialing : EnBloc

off-hook dialing : Digit by Digit

SIP

type B on-hook dialing no dial-rules : EnBloc

type B off-hook dialing no dial-rules : Digit by Digit with KPML event

CCIE Collaboration written 400-051 notes.

December 16, 2015 by Joost van der Made

Here are some thing that is nice to know. Of course check the blueprint to see what is recommended reading.

Cisco Unified IP Phone Firmware Distribution Methods

Table 1. Summary of Distribution Models

	Peer Firmware Sharing	Load Server	Traditional TFTP
Advantages	• Hierarchy is automatic • One download per phone model on a subnet • Uses TCP • Fails back to TFTP • Speeds up LAN upgrades • Reduces TFTP CPU load during upgrade	• Has same download time as LAN image distribution • Distributes TFTP load over multiple TFTP servers	• Proven distribution • Default behavior
Disadvantages	• Must be enabled on each phone • Hierarchy is formed for each phone model • Hierarchy is limited to subnet	• IP must be set on each phone • Administrator must manually file copy to load server • No failback to TFTP on error • More prone to user error	• High-bandwidth requirements • Multiple requests for same file • High CPU usage on TFTP server

Link : http://www.cisco.com/c/en/us/products/collateral/collaboration-endpoints/unified-ip-phones-9900-series/white_paper_c11-583891.html

Callmanager Express CME Translation rules

December 10, 2015 by Joost van der Made

Currently I am studying for the CCIE Collaboration written to re-certify my CCIE. It was a long time since I worked with the translation rules, so here’s some nice stuff with a load of rules. Basic cme translation rules : /123/ /456/ = replace 123 with 456 ^ = begins with $ = end of … Read more

CCIE Collaboration Written 400-051

November 13, 2020May 22, 2015 by Joost van der Made

It’s time to renew my CCIE again. This time I am gonna do it with the Collaboration written exam. It’s more then 7 year ago that I passed my CCIE Voice, but the knowledge is still there. 🙂 Ofcours I start with the SRND and deployment guides. Normally that covers a lot of the written. … Read more