E1 And T1 Configuration Task List - 3Com MSR 50 Series Configuration Manual

2312 C 134: E1
HAPTER AND
E1 and T1
Configuration Task
List
T1 C
ONFIGURATION
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 loop-start and ground-start signaling (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 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 81 Protocols supported by E1/T1 voice
Item
Framing format
Line coding format
Complete these tasks to configure E1 and T1:
Task
"Configuring Basic Parameters for E1 Voice Interfaces" on
page 2313
"Configuring Basic Parameters for T1 Voice Interface" on page
2315
"Configuring the Voice Subscriber Line for a TS Set" on page
2316
"Binding Logical Voice Subscriber Line to POTS Entity" on
page 2319
"Configuring R2 Signaling" on page 2319
"Configuring DSS1 and Q.SIG Signaling" on page 2330
"Configuring Digital E&M Signaling" on page 2331
"Configuring Digital LGS Signaling" on page 2334
n
The router supports the VE1/VT1 voice interface card and a VE1/VT1 voice
■
interface card is inserted on the router.
When configuring a voice interface, complete basic parameter configuration
■
and configure voice subscriber lines for TS sets depending on signaling before
making other configurations. Before configuring signaling, you may go to
E1 Voice
Cyclic redundancy check 4
(CRC4), non-CRC4
High-density bipolar 3 (HDB3),
alternate mark inversion (AMI)
T1 Voice
Super frame (SF), extended super
frame (ESF)
Bipolar 8 zeros substitution (B8ZS),
alternate mark inversion (AMI)
Remarks
Optional
Optional
Required
Optional
Optional
Optional
Optional
Optional