I'd like to have the remote site (SiteB) able to dial 5 digits extensions of the HQ during the SRST mode.So from SiteB to route calls to HQ in srst mode, we need 11 digits handed off to the PRI which hits the HQ gateway delivering only 4 digits. Now, how to send any extra digits following the 11 digit sequence? There is no correlation between the last 4 digits and the DID number. In this example, say we only have one DID number, however on both sides (HQ and siteB) we have 20 phones. can we achieve this?