Posted by: David Hailey
on Jan 29, 2010
Tagged in:
WeePhone ,
VoIP over 3G ,
SIP VoIP Phone for iPhone ,
SIP Clients for iPhone ,
iPhone SIP Clients ,
CUCM ,
Communications Manager ,
Cisco CallManager ,
AT&T ,
Apple iPhone ,
Acrobits Softphone ,
3G
Just recently, I wrote a blog about SIP clients for iPhone and provided my review of two 
client applications based on testing of their integration with Cisco CUCM. If you've not yet read that blog, you can find it here:
SIP Endpoints in Cisco CUCM - Acrobits Softphone and WeePhone for iPhone
Well, one of the questions I received was about whether or not any of these iPhone applications work over 3G or will they ever work over 3G...and my initial thought was "yeah, but probably not anytime soon". So, call it coincidence or just impeccable timing but today I happened to run across some interesting news articles. Apparently, my expectation of "not anytime soon" translates to "today" at Apple as the title of this first link is pretty self-explanatory:
Apple Now Allowing iPhone Apps to Make VoIP Calls Over 3G Networks
Posted by: David Hailey
on Jan 27, 2010
Tagged in:
WeePhone ,
SIP VoIP Phone for iPhone ,
SIP Clients for iPhone ,
iPhone SIP Clients ,
iPhone ,
CUCM ,
Communications Manager ,
Cisco CallManager ,
Apple iPhone ,
Acrobits Softphone ,
Acrobits
I guess I'll have to add another thought to my "What It's Like to Be a NetCraftsmen" series and that is that sometimes being a NetCraftsmen is funny. At times, I feel like the UC team shares a collective brain because I had already sketched out a blog on how to use your iPhone as a 3rd-Party SIP device with CUCM and then I suddenly see that Bill Bell did the same thing (in the wee hours of the morning as I did) but instead he focused on a desktop client called X-Lite. If you haven't seen Bill's blog, it's good as usual so make sure to check it out here: SIP Endpoints in Cisco CUCM - X-Lite As an Example. At first I thought, "Oh well, he beat me to that one" but then I realized that this was a good opportunity for cross-blog collaboration and to point out some key behavioral/configuration differences I've seen with the iPhone applications I've tested as compared to the X-Lite desktop application.
Posted by: William Bell
on Jan 27, 2010
So, this blog started with me looking for something to break up the heavy design documentation I have been doing for what seems like forever. Like all tangents I undertake I find that I want to touch every button and turn every dial. Some would say I am a glutton for punishment. Of course they are right -- I mean here I am at 3am writing this blog. But enough of that, let's talk about how to add CounterPath's X-Lite SIP softphone to Cisco Unified Communications Manager (CUCM).
Posted by: Jim Marinelli
on Jan 25, 2010
Cisco VSS Dual-Active Detection - In my last blog, I explained how to configure VSS. In this article I’ll explain how to configure Dual-Active Detection. This is an important function of VSS because it prevents both supervisors from becoming active in event of a VSL link failure.
A VSS pair is connected by a VSL (virtual switch link). If the standby switch detects a complete loss of the VSL, it assumes the active chassis has failed and will take over as the active chassis. However, if the link has failed but the active chassis is still functioning, this can result in both chassis being in the active state. With both chassis routing packets and connected to upstream or downstream switches, black holes can occur.
Posted by: David Hailey
on Jan 22, 2010
You know sometimes I like to write lists. Not shopping lists or "to-do" lists but lists that help me decide on or better define something in particular. For example, before I got married I sat down with pen and paper and wrote down everything I liked and didn't like about my future wife. Deep down, I already knew my decision but seeing the overwhelming list of "Pros" vs. the nearly non-existent "Cons" in front of me really sealed the deal. So what's my point? Recently a little birdie (actually a rather important little birdie that happens to be the President of our company) hinted that he'd like to see someone write a blog about what it's like to be a NetCraftsmen. I thought it was a good idea myself and figured I may as well jump start the concept and give it a go.
Posted by: William Bell
on Jan 19, 2010
Starting in October I began writing a series of articles about the AXL SQL Toolkit that Cisco provides with the Cisco Unified Communications Manager (CUCM). I started the series because a friend of mine wanted to know more about how to get more granular "views" on the CUCM database. In the first article, we discussed the table structure, tables, and relationships (well, some examples at least). In the second article we discuss the AXL SQL Toolkit itself. Now, I wanted to round out the series with a real world example of using the toolkit. Let's stat with a question: Have you ever wanted to change the LDAP filter used by CUCM DirSync?
Posted by: William Bell
on Jan 18, 2010
Every once in a while I get asked if there is a better way to distribute firmware to phones across the WAN. The obvious driver is the general performance (or lack thereof) for the standard TFTP approach when handling a large number of requests. This is one of those questions that usually comes up the day before a mass firmware upgrade and then goes to the back burner, only to come up again during the next upgrade cycle. Nonetheless it is an important consideration and, fortunately, there are several options available to us.
Posted by: Rob Chee
on Jan 17, 2010
MARS and Cisco IPS are synchronized for the official IPS signatures created by Cisco. This is done through the automatic updates that occur on the IPS side and on the MARS side. On the IPS side, this done by configuring “Configuration > Sensor Management > Auto/Cisco.com Update” within IPS Manager Express (IME). This is shown below
Posted by: Pete Welcher
on Jan 4, 2010
Tagged in:
xconnect ,
vlan-based EoMPLS ,
pseudowire ,
pseudo-wire ,
port-based EoMPLS ,
Layer 2 tunnel ,
Ethernet over MPLS ,
EoMPLS ,
data center interconnect ,
Cisco MPLS ,
Cisco 7200 ,
Cisco 6500
A previous article took a look at Port-Based EoMPLS on a 6500. See http://www.netcraftsmen.net/resources/blogs/working-with-eompls.html?blogger=Pete+Welcher. In particular, the MTU and LDP (MPLS label protocol) setup is discussed there. It is not repeated with the configlets below.
