System information

CHAPTER 4. TRUNK OPTIONS AND REQUIREMENTS 4-5
Analog trunk requirements ________________________________
TeleVantage supports standard loop-start analog trunks. TeleVantage can also use Centrex
trunks or operate behind a PBX that is connected to the central office at the telephone company.
Additional required hardware for analog service
No additional hardware is required for analog or Centrex/PBX trunks.
To support analog DID service, you need a DID interface unit which sits between TeleVantage
and your phone company. One DID interface unit can support up to 4 analog DID trunks. For
information about DID interface units that work with TeleVantage, see your TeleVantage
provider.
T1 trunk requirements ____________________________________
TeleVantage supports two protocols over T1 lines:
Q ISDN
Q Robbed Bit. (Robbed bit signaling is not supported on Dialogic DM3 ISDN boards. For
more information about specific boards, see the Notes to the “Basic board information”
table in Appendix E in Installing Dialogic Telephony Components.
T1 carrier requirements
The following table lists the T1 configuration requirements for TeleVantage. You must supply
this information to your phone company when you order T1 service.
T1 Requirements for TeleVantage
Framing Type D4 Superframe or Extended Superframe
Interface DSX-1
Supervisory signal 2- or 4-wire E&M
Wink Wink and double wink
Line coding/Framing For D4 Superframe: AMI
For Extended Superframe: B8ZS
Digit signaling Robbed Bit: DTMF or MF
ISDN: DTMF