point to point voice problem

[binoyjosephstanly]

Dear all,

i'm new to voice pls help me.

i have connected 2 offices using a p-t-p 128kbps leased line.routers are 2801.i have checked the connectivity

its fine.i'm using wic-1T for this connectivity on both sides. for voice purpose i have installed VIC2-FXS card.

my IOS on both sides are "c2801-ipvoice-mz.124-6.T2.bin".

and i have installed PVDM2-8 is installed on both routers.

my plan is to put 2 phones at each office.my phone is Ericsson phone model no is 4186 something its not an ip phone.so can i connect directly to fxs port.how can i configure this scenario.

i have a configuration with me can anybody verify this and give me guide lines.any reply will be appreciated with good rating.

please seee the config below.

Router> enable

Password:

Router# configure terminal

Router(config)# interface serial 0/0

Router(config-if)# ip rsvp bandwidth

Router(config-if)# ip rtp header-compression

Router# interface serial 0/0

Router(config-if)# mtu 300

Router(config-if)# interface serial 0/0.1 point-to-point

Router(config-if)# ip address 192.168.19.0 255.0.0.0

Router(config-if)# ip rsvp bandwidth

Router(config-if)# frame-relay ip rtp header-compression

West(config)# dial-peer voice 401 pots

West(config-dial-peer)# dest-pat +14085553737

West(config-dial-peer)# port 2/0/0

West(config)# dial-peer voice 402 pots

West(config-dial-peer)# dest-pat +14085554141

West(config-dial-peer)# port 2/0/1

West(config-dial-peer)# exit

West(config)#

East(config)# dial-peer voice 901 pots

East(config-dial-peer)# dest-pat +19199588282

East(config-dial-peer)# port 3/1/0

East(config)# dial-peer voice 902 pots

East(config-dial-peer)# dest-pat +19199589595

East(config-dial-peer)# port 3/1/1

East(config-dial-peer)# exit

East(config)#

Thanks in advance

Regds

Binoy

[k_satish80]

Is your routers configured with VOIP dial-peer?.

dial-peer voice 10 voip

destination-pattern 19T

session target EastrouterIP

dtmf-relay h245-alphanumeric

Let us know your problem.

Regards

Satish k

[binoyjosephstanly]

Hi sathish

thanks for your reply.sathish actually i dont know how to configure voip.as i told u i'm connecting the phones directly to fxs card.i dont know how to assign patterns if i just want to give 801 & 802 for my branch phones and 601&602 other office phones, how can i proceed with this. pls help sathish.

[jneiberger]

At that speed, I'd recommend configuring Link Fragmentation and Interleaving (LFI). Serialization delay is pretty bad at 128 Kbps.

[binoyjosephstanly]

i have only 2 phones on both offices.how can i procced with this can you give me a configuration sample.

[anup.anand]

You would need to add VOIP dial-peers so that the routers can send calls between each other. Lets assume that the IP Address of the East router is 10.10.10.1 and that of the West router is 10.10.10.2

East router configs

dial-peer voice 100 voip

destination-pattern 1408555....

session-target ipv4:10.10.10.2

West router configs

dial-peer voice 100 voip

destination-pattern 1919958....

session-target ipv4:10.10.10.1

A couple of things on your existing configuration

1. On the existing pots dial-peers on both routers, take out the + and use just the numbers

2. The subnet mask of the serial interface doesn't look right.

ip address 192.168.19.0 255.0.0.0

Since it is a Class C network, usually the subnet mask would be 255.255.255.0, unless you are doing supernetting.

Are you able to ping between these two routers?

3. Also I would suggest that you take out all compression (ip rtp and frame-relay) for now. You can add this later after your the basic setup is working. You don't need to use both compression methods. Just one method is good.

Regards,

Anup

[binoyjosephstanly]

thanks anup valuable information

Regds

Binoy

[tomchan]

Check this out for your reference.

http://www.cisco.com/en/US/tech/tk1077/technologies_configuration_example09186a0080094192.shtml

http://www.cisco.com/warp/public/788/voip/voip_ppp_lowbw_rtp_prio.html