I dont think u can achive load balnceing in this scenario since both link are terminated on the same router and u can not run any routing protocol instead of that configure policy based routing for both the links and utilize the same.

HiWhen u ping the remote end packet travels from one end to remote end similary when u ping your own interface packet goes to the remote end serial interface and then pings your interface back so the time taken for this is twice when compared to the ...

hi Make this MTU has 1500 then check the speed of internet as well as voice quality it will be fine.

hi Since it is a 64k Link have u configured this link with multi link with ppp encapsulation then apply qos on it, it will work.

ip pim sparse-dense-mode ip pim version 1u enable all this commands also.