Hardware Compatibility With Digital Voice Subscriber Lines; E1 And T1 Configuration Task List - HP FlexNetwork MSR Series Configuration Manual

•
ITU-T R2 signaling—Includes digital line signaling and interregister signaling. Digital line
signaling is transmitted in TS16 (ABCD bits) of E1 trunk. It conveys status information about E1
trunks to describe whether the trunks are occupied, released, or blocked. Interregister signaling
conveys information about address, language and discriminating digits for internal calls, echo
suppressor, caller properties and callee properties in multi-frequency compelled approach
(forward and backward) in each timeslot.
•
Digital E&M signaling—Similar to R2 signaling. It transmits E (recEive) and M (transMit) call
control signals similar to analog E&M signaling in TS16, alignment signals in TS0, and voice
signals in other timeslots. In digital E&M signaling, when an E1 trunk detects and sends
connection signaling, it looks at the signal in TS16. Digital E&M signaling provides three start
modes, immediate, wink, and delay, to adapt to different devices for more reliable connection.
•
Digital LGS—Digital loop start signaling is used between telephones and switches to identify
the off-hook/on-hook state, while ground-start signaling is used between switches. They differ
in that the two parties in conversation must check grounding state before closing the line in the
ground-start approach.
Fax function
The FAX function is available on E1/T1 voice interfaces to set up fax channels and transmit/receive
fax data.
Protocols and standards
E1/T1 voice supports SIP and recommendations in the ITU-T H.323 framework, and G.711, G.729,
and G.723.1 Annex A (5.3K and 6.3K) in ITU standards.
Table 4 Protocols supported by E1/T1
Item
Framing format
Line coding format
Hardware compatibility with digital voice
subscriber lines
Digital voice subscriber lines are not available on the following routers:
•
MSR900.
•
MSR93X.
•
MSR1000.
•
MSR30-11E.
•
MSR30-11F.

E1 and T1 configuration task list

Configuration considerations:
1. Install a VE1 or VT1 voice interface card on the router.
2. Configure basic parameters for voice interfaces.
3. Configure the corresponding voice subscriber line for each TS set.
4. Configure signaling.
E1 Voice
Cyclic redundancy check 4 (CRC4),
non-CRC4
High-density bipolar 3 (HDB3), alternate
mark inversion (AMI)
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T1 Voice
Super frame (SF), extended super
frame (ESF)
Bipolar 8-zero substitution (B8ZS), AMI