Any ideas on MPPP T1s with 1 T1 using 8 channels for voice?

[cgregg]

Has anyone ever tried this; Bonded T1s with 8 channels of 1 T1 used for voice? I don't have much other information now so I am thinking that with CAS and PRI signaling this is doable however with PRI a MUX might be required.

Any ideas?

Thanks in advance

[mchin345]

I am not very sure whether this setup will work. Because the PRI will work on a ondemand basis and hence bonding 8 channels of a PRI for Voice will not be a good option. For Voice traffic I suggest that you go for always on connections like a PVC or a Leased line...

[amit-singh]

Hi,

yes,you can certainly run Multilink PPP on that as for the load balancing. What you need to do is go to the controllers e1 in config mode and set the parameters there for the full t1. then go the controlllers e1 to the fractional T1 and set the parametrs for both the voice and data slots using the channel-group and then assiging the time slots taken from ISP. This thing will work but when the primary full T1 goes down it will choke your fractional T1 data but not the voice at all. you voice traffic will not effected.

Config :

For full T1

controller T1 6/1

framing ESF

channel-group 0 timeslots 1-23

for fractional T1

controller T1 7/5

framing ESF

channel-group 0 timeslots 1-4

channel-group 1 timeslots 6-9

channel-group 2 timeslots 10-23

interface s6/1:0

no ip address

ppp multilink

mulilink-group 1

interface s7/5:0

no ip address

ppp multilink

mulilink-group 1

interface multilink

ip address x.x.x.1

ppp multilink

multilink-group 1

please make sure that you have fractional t1 on both the sides.

HTH,

-amit singh

[cgregg]

Thanks for the feed back this helps.

Question:

Does voice signaling become a problem and no MUX required? I thougth that with PRI signaling a MUX would be required however with CAS, no MUX?

Thanks,

Curt

[amit-singh]

well, it depends on how ISP gives you the connections. Usually Mux is there with the PRI's.

Voice singaling will not be a problem as you are assigning different time slots for voice.

HTH,

-amit singh