Verilink AS4000 (34-00244) Product Manual - Manual (Page 116)

DS-3 Module
7-6 Verilink AS4000 User Manual
Receive Loop Timing If Enabled, the DS-3 module uses the clock frequency it recovers fron the receive
circuitry to derive transmit clock as well, if Disabled the DS-3 module uses
internal transmit clock.
Short Cable Select Yes if the cable to the exchange carrier DS-3 equipment is less than 50 feet
long. Select No for a cable equal to or longer than 50 feet.
M1-3 Remote
Loopback
To support loopbacks initiated by the T3 service provider, select the loopback
type which your provider uses. Get this information from the service provider.
Available selections are:
Stuff Bit = 0—The stuff bit is always a zero, applies only to M1-3 framing.
Stuff Bit = 1—The stuff bit is always a one, applies only to M1-3 framing.
3rd C-Bit Inverted—The third C bit is inverted in each DS-3 frame.
2nd C-Bit Inverted—The second C bit is inverted in each DS-3 frame.
1st C-Bit Inverted—The first C bit is inverted in each DS-3 frame.
3rd C-Bit & Stuff Bit Inverted—The third C bit and each stuff bit are inverted in
each DS-3 frame. Applies only to M1-3 framing.
2nd C-Bit & Stuff Bit Inverted—The second C bit and each stuff bit are inverted in
each DS-3 frame. Applies only to M1-3 framing.
1st C-Bit & Stuff Bit Inverted—The first C bit and each stuff bit are inverted in each
DS-3 frame. Applies only to M1-3 framing.
Stuff Bit Inverted—All stuff bits are inverted in each DS-3 frame. Applies only to
M1-3 framing.
Rcv AIS Selection The received bit pattern that will be interpreted as an Alarm Indication Signal.
Consult with your network service provider to insure your selection matches their
equipment configuration.
Xmit AIS Selection The bit pattern that will be transmitted, as an Alarm Indication Signal, to indicate
that a red alarm condition exists in this DS-3 module. Consult with your network
service provider to insure your selection matches their equipment configuration.