Voice over IP

Hi,There is an IP box which is sending Fax to Cisco AS5350 via a Sip server.The protocol used by IP box is t38 only.The Fax configuration in Cisco is :voice service voip fax protocol t38 ls-redundancy 2 hs-redundancy 2 fallback pass-through g711ulaw...

We have a cisco-2821 router with vic-4FXO card.We also have cisco callmanager-4.0 with 7940G IP Phones.Want to configure gateway router in such a way that it connects to PSTN network and flow of voice call should be from IP Phones behind CallManager ...

hi my name is sumit. In my network there is a frame-relay pvc on 7206 VXR router on which 2 T1's are terminated(from S8700 EPABX) and the bandwidth of this PVC is 600 KBPS. we are using rtp and tcp header compression technique(codec g729r8).7206 rout...

Hi I have a 2811 and I'm using a VWIC2-2MFT-T1/E1 card, but when I try to configure the E1 controller this doesnt appear in the configuration. I know that it is necessary the IP Plus or IP voice feature set for IOS. But is it possible to have another...

What anomalies are we expecting if we are getting Sequence error and high Delta and Jitter values in RTP stream.

Team,We have had a strange issue for some time. We have an Nortel 81c intergrated with CallManager (v3.1(3a) using two VG200s (12.2(11) T). Everything works well and this hybrid network has been stable for the last 1.5 years. However, on the Norte...

Hi All,I got problem with call retrying. My Cisco AS5400 connects to Excel switch via E1, i saw many failed calls with same number, same disconnect code, just different one or two seconds in starting time. I want to stop retrying that calls by puttin...

The Paris telco has onsite and states the BRI line is fine, any ideas? Does Paris telco has auto spid? Do I need a special ISDN cable for use in Paris? Do I have the right hardware ISDN card? Router#show run interface BRI0/2/0 no ip address isdn swit...

I am curious if anyone else has had this problem. My users are experiencing garbled messages, or what sounds like intereference and sometimes cut-outs, when accessing their voicemails. However, it apparently isn't on the voicemail itself because wh...

our customer opens a Call center with Nortel CS1000 ACD, and PBX. They want to integrate voip with this equipments and propose Nortel Passport 8610 switch as the core switch for voip, and data. Can Cisco Cat 6509 fits into this and replace the Nortel...

Hello.Please, help me with the next trouble:AS5350 IOS 12.3,How to increase isdn t301 timer ?When i'm trying to isdn t301 1000,the machine does not understand command.How can it be done?

Gents:I am wondering if you somebody could help me understanding the call-flow in two scenarios.Some basic network setup(Planned, not in place yet)We have two sites in Philadelphia, 2 miles apart, and planning to install MPLS VPN between the sites.We...

I have several end user now that are using the cisco softphone. Most of these users are frequent travelers, therefore they have a physical phones in their office. In recent months, we have began to rollout the softphones to our home users. For the mo...