Can I connect AN-TDM-IP-2E1 together with another vendors TDM over IP devices?

Can I connect AN-TDM-IP-2E1 to AN-TDM-IP-4E1 and 8E1?

What is the bandwidth required at IP to get units work?

Link indicator on units shows all OK, but I can see E1 bit errors on my tester.

• If PKTLOS LED indicator is flashing or always on, please check the bandwidth of the wired or wireless link.
• Please double check the quality of RJ-45 cables;
• Please check the Surge Suppressor (Bad grounding will introduce interference)
• If PKTLOS LED is always off, please try to enlarge jitter buffer size to see.

How to reset the password to default?

E1AErr or E1BErr LED is on, what does it means?

Loss of E1 signal fault is detected by TDM over IP unit. Possible causes include:

• The downstream equipment such as telephone exchange or PCM terminal is powered off.
• The E1 cable connection looses or broken.

Link/Act LED off

Ready LED does not blink

After about 1 minute from power on, the Ready LED should start to blink. If not, check if both dips of the loop back control switch is pressed down. These switches should remain at the upper position for normal operation.

I still can not set up the E1 channel, what else I can check?

When two AN-TDM-IP-2E1 are within the same Ethernet broadcast domain, try following.

• Check if the transmission network is on.
• If ARP is not enabled, check MAC address settings on both units, one unit’s local MAC must be the other unit’s remote MAC.
• If ARP is enabled, check that the network will pass broadcast packets. For a network that suppresses broadcast packets, as some of the wireless LAN bridges do, disable ARP and manually setup local and remote MAC’s.
• Check that there is no MAC address conflict on the LAN.
• Check that the transmission network has enough bandwidth (more than 2.5Mbps duplex).

  When two AN-TDM-IP-2E1 are in different Ethernet broadcast domains, IP headers must be used, and packets will be routed by a gateway router, try following.

• Make sure that the ARP is enabled.
  
• Check if the default gateway IP is defined correctly.
  
• Check if the local and remote IP is set correctly.
  
• Check for any conflicts in IP or MAC addresses
• Make sure the transmission network has enough bandwidth.

Downstream reporting slips, what I can check?

Check if the downstream equipment has correct clock mode. At least one of them must be clock master. Set the EthMux on master side to loop timing.

If the downstream equipment on both sides are not synchronized, slips are not avoidable.

What timing mode is preferable to set?

Correct timing mode setting is important for smooth operations. In most cases, setting both units to adaptive timing mode is sufficient. But sometimes, setting one unit to loop timing mode may work better. For example, setting the AN-TDM-IP-2E1 unit connected with the clock master (such as local exchange) to loop back mode, and the other unit connected with the clock slave (such as PBX or remote module) to adaptive mode, is probably better than setting both to adaptive modes.