PRI Load balancing

[venky]

Hello All,

I have one doubt about PRI load balancing.

We have two PRI lines each one have 23 channels. If first PRI line is fully utilized how calls will routed second PRI line.

How can we make configuration to achieve this. if anyone please provide with details steps how can we processed.

Thanks,

Venkatesh 

[Ramamoorthy Shanmugam]

Hi ,

 Inbound:

Your ISP will do the call routing Distribution Algorithm like top down or circular based on Pilot number.( service no). This can be achieve MSC level.

Outbound:

Create Route Group in CUCM when you have two VG. Otherwise do it in dial-peer level below is the example.

Preference 0 is the highest which is the default. Therefore you having preference 1 on dial-peer 502, all calls will use dial-peer 501 first until all the channels have been used. If you remove the preference 1 from dial-peer 502 the calls should load balance between the two ISDN circuits.

dial-peer voice 220 voip

 description <<DIAL_PEER_FOR_OUTBOUND>>

 session protocol sipv2

 incoming called-number 9T

 voice-class codec 1

 voice-class sip rel1xx supported "100rel"

 dtmf-relay rtp-nte

 no vad

 clid network-number 4480xxxxxx

!

dial-peer voice 501 pots

 tone ringback alert-no-PI

 description <<POTS_DIAL_PEER_FOR_LOCAL & INTERNATIONAL_CALL>>

destination-pattern 9T

 progress_ind alert enable 8

 progress_ind connect enable 8

 port 0/0/0:15

!

dial-peer voice 502 pots

 tone ringback alert-no-PI

preference 1

 description <<POTS_DIAL_PEER_FOR_LOCAL & INTERNATIONAL_CALL>>

destination-pattern 9T

 progress_ind alert enable 8

 progress_ind connect enable 8

 port 0/0/1:15

Ram.S