Questions tagged [voip]

For questions about Voice over Internet Protocol (VoIP) which encompasses various technologies (methods, functions, and encapsulations) for encoding and delivering audio on a network using IP.

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Cisco 871, NAT, port formwarding and VOIP configuration - phone speaker buzz

I'm new to all Cisco stuff and I need to configure nettalk VOIP. I have Cisco 871 device with two ISP - one via PPP (public IP 666.666.666.666) and one via eth (public IP 999.999.999.999). Main ISP ...
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2answers
3k views

Cisco IP Phone 7941 Never Asks for TFTP files?

I've been reading and googling for the past week trying to wrap my head around the Cisco IP Phone TFTP upgrade process. The effort has been to try and make a Cisco 7941G work with Asterisk. This ...
3
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1answer
2k views

Outgoing call routing issue Avaya IP Office PBX

I have an Avaya IP Office PBX phone system. There is a T1 coming in for the trunk. There were 6 numbers associated tot he trunk. 4 of the numbers were taken off by Telco provider and converted to ...
3
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2answers
153 views

what is a data only mode card

I have a router (cisco 1841 modular router) and in the router's guide. They guide says that the c1841 is a data-only mode, even the VWIC cards is data only. I want to add a Polycom group series 500 ...
2
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2answers
357 views

Is it possible to run CME in a Cisco 1812

I have a router Cisco 1812 (P/N CISCO1812/K9). My question is if it possible to run Call Manager Express into its IOS and which version.
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2answers
1k views

VoIP switch setup trouble

I have a brocade icx 6450 with the following config. The pc's are connected directly to the phones. I have port 1/1/48 going into another switch which is has the dhcp server for the data network ...
8
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1answer
379 views

Cisco callmanager SIP features

I am a programmer working in a software for the sales dept. I would like to know if a feature I want to implement is possible or not. The user has an application where he can see information about a ...
3
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1answer
131 views

catalyst 6509 using fxs card to convert analog to sip for an external pbx?

I am looking in to getting a 6509 with supervisor 2 module. I noticed that there was a fxs card avaiable and started to wonder if you had to use the unified software on a pc or if it would be ...
4
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1answer
9k views

UDP Port Forwarding Range

We just purchased a cisco 3825 router running IOS 15.1. The slice of the topology in question is as follows: RTP (8000-20000) RTP (8000-20000) 192.168.2.1 <-------------->...
4
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2answers
3k views

Access Cisco Call Manager Express on 2811 Router

I'm trying to gain access to my business' Cisco 2811. I did the standard password reset following these procedures: http://www.cisco.com/en/US/products/hw/routers/ps259/...
8
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4answers
557 views

QoS on a dedicated VOIP network

Is there any point in enabling QoS on a dedicated VOIP network that only has VOIP traffic?
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3answers
3k views

Find IP Address of Cisco 2811

I'm trying to configure the phone configuration on my business' Cisco 2811 router. Without buying a bunch of dongles and connecting through the console port of the router, I'd like to try to SSH or ...
7
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1answer
640 views

Overview of following cisco 2800 config

Here is the config of one of our routers. Can any one give an overview? I believe its for VOIP. We are going to replace this router with a non Cisco firewall, will there be any issue for VOIP in the ...
10
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1answer
37k views

How can I reasonably verify my QoS configuration is working?

Context I've deployed a standard QoS config to a customer site running a Cisco 891 router with IOS 15.1(4)M4. The WAN link is a single ADSL2+ link (24/1Mbps) connected to FE8. I've previously tested ...
4
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2answers
5k views

How do I tag traffic with a DSCP value on an ASA?

I have a SIP Server that does not put a DSCP code on it's traffic. This server is behind an ASA, and I want to prioritize its traffic passing through an ASA from the private to public network. I am ...
8
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2answers
13k views

Difference between LLDP and LLDP-MED

What is the difference between LLDP and LLDP-MED? Is LLDP-MED an add-on to LLDP or something completely different?
10
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2answers
4k views

How can I disable SIP on IOS 12.x

How would I disable SIP on an Cisco router running IOS 12.x?

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