We got one E1 from provider. We are using Asterisk 1.8.21.0-rc1 and chan_ss7 version 2.1.0. Operator give us two signalling link on one E1. They said to use one for signalling and one for voice. We needed to connect one media gateway and one voice server for each signalling link. We don't know how to setup in ss7.conf. Our ss7.conf is here. I don't know where should i put the 2nd signalling thats we have to use for voice. [linkset-telenor] enabled => yes enable_st => yes use_connect => no hunting_policy => odd_lru subservice => auto context=ss7in [link-l1] linkset => telenor channels => 1-15,17-31 ;echocancel => always schannel => 16 firstcic => 1 enabled => yes [host-mgateway2.fditel.com] enabled => yes ;default_linkset => telenor opc => 5609 dpc => telenor:5448 ;links => l1:1,l2:2,l3:3,l4:4 links =>l1:1