IP Telephony uses which protocol that does not accommodate re-transmission? PrometricVUE.com

TestKing sells managed IP Phone service to businesses in multi-tenant units. TestKing hasPOPsin many cities, so all of their dial peer patterns are based on 10 digit numbers. Users dial 9 for local calls, followed by the 7 digital local number.
The following dial peer has been configured in aNew YorkPOP:
dial-peer voice 595 pots destination-pattern 595 port 1/0:24
A user dials a local number, 94422.
What command must be configured in the gateway to allow the call to complete?

What will happen when a network link is oversubscribed?

You are the network technician at domain.com. Your newly appointed TestKing trainee wants to know which application conveys fax using T.37 fax relay.
What will your reply be?

You are the network engineer at domain.com. The TestKingISDNnetwork has twoPBX systems from different manufactures.
Which protocol allows functionality between these two PBX systems?

TestKing has a PBX at corporate HQ and one at a branch office. You to replace the PBX-to-PXB TDM trunk connection with IP connectivity. The PBXs use proprietary signalling method.
The following is a partial configuration of the HQ router that connect to the PBX:
controller t1 1/0 ds0-group 1 timeslots 1-24 type ext-sig dial-peer voice 1 voip
destination-pattern 1001 session target ipv4:10.10.0.1 dial-peer voice 2 pots destination-pattern 2001 port 1/0:1 connection trunk 1001
Which command is missing from the above configuration?

To which layer of the OSI model does Q.921 signaling equates to in ISDN?

What type of connection is considered a call leg?

Which of the following is the worst-case compression delay for CD-ACELP?

Which of the following are CS-ACELP coding schemes? (Choose two)