E1 trunk protocols reference

The following properties are provided for voice card E1 trunk protocols. Properties are in alphabetical order and identified by card type.

The number of channels available are for the DP3209 card; if you use a DP6409 card the number of channels available is doubled, as two trunks are available with this card.

			Applicable Cards
Protocol	Description	Channels Available	DP	DT
ISDN / DASS2	Integrated Services Digital Network (ISDN) is a signalling variant used with the T1 or E1 that reserves a single data channel on each multiplexed line for signaling information. This setting must match the setting on the PBX/phone switch. DASS2 is a predecessor of ISDN.	30 / 60
Non-ISDN / RBS	Applies to CAS or Robbed Bit Signaling (RBS), which are signalling variants used with the T1 or E1, reserving a single data channel on each multiplexed line for signaling information. This setting must match the setting on the PBX/phone switch.	30 / 60
DPNSS	The Digital Private Network Signalling System (DPNSS) is a network protocol used on digital trunk lines for connecting two PBXs. DPNSS supports a defined set of inter-networking facilities. This setting must match the setting on the PBX/phone switch.	30 / 60