| Command | Range of Values | Default Value | Description |
| define x25 parameters ackDelayTimer | Integer (0..65535) | 500 | Select the amount of time (in milliseconds) that the packet layer will wait before acknowledging a received data packet. 0 means the packet layer will immediately acknowledge all received data packets. |
| define x25 parameters callTimer | Integer | 200000 | The T21 call timer, in milliseconds. See RFC 1382. |
| define x25 parameters clearTimer | Integer | 180000 | The T23 clear timer, in milliseconds. See RFC 1382. |
| define x25 parameters clearCount | Integer (0..65535) | 1 | The R23 clear retransmission count. See RFC 1382. |
| define x25 parameters dbitAction | plp | application | application | Select whether the application is required to acknowledge packets with the d-bit size, or whether the packet layer (plp) can acknowledge the packets. |
| define x25 parameters hicChannel | Integer (0..4095) | 0 | The highest incoming channel number. 0 means no channels are reserved for this range. |
| define x25 parameters hocChannel | Integer (0..4095) | 0 | The highest outgoing channel number. 0 means no channels are reserved for this range. |
| define x25 parameters htcChannel | Integer (0..4095) | 64 | The highest two-way channel number. 0 means no channels are reserved for this range. |
| define x25 parameters interfaceMode | dte | dce | dce | Select whether the packet layer is to operate in DTE or DCE mode. Make sure that one end of the X.25 connection is set for DCE operation and the other end is set for DTE operation. |
| define x25 parameters licChannel | Integer (0..4095) | 0 | The lowest incoming channel number. 0 means no channels are reserved for this range. |
| define x25 parameters locChannel | Integer (0..4095) | 0 | The lowest outgoing channel number. 0 means no channels are reserved for this range. |
| define x25 parameters ltcChannel | Integer (0..4095) | 1 | The lowest two-way channel number. 0 means no channels are reserved for this range. |
| define x25 parameters locDefPcktSize | Integer (16, 32, 64, 128, 256, 512, 1024, 2048) | 128 | The default packet size for this interface. |
| define x25 parameters locDefWSize | Integer (1..7) | 2 | The default window size for this interface. |
| define x25 parameters locMaxPcktSize | Integer (16, 32, 64, 128, 256, 512, 1024, 2048) | 1024 | The maximum negotiated packet size that will be accepted by this interface. |
| define x25 parameters locMaxWSize | Integer (1..7) | 7 | The maximum negotiated window size that will be accepted by this interface. |
| define x25 parameters maxActiveCircuits | Integer (0..4095) | 32 | The maximum number of active circuits this interface can support. Note: the maximum number of virtual circuits the Passport 4400 unit can support, PVC and SVC combined, is 96. |
| define x25 parameters numberPVCs | Integer (0..4095) | 0 | The number of PVCs configured for this interface. |
| define x25 parameters packetSequencing | 8modulo | 8modulo | Specifies the modulus of the packet layer sequence numbers. |
| define x25 parameters remMaxPcktSize | Integer (16, 32, 64, 128, 256, 512, 1024, 2048) | 1024 | The maximum negotiated packet size that will be accepted by the remote interface. |
| define x25 parameters remMaxWSize | Integer (1..7) | 7 | The maximum negotiated window size that will be accepted by the remote interface. |
| define x25 parameters remDefPcktSize | Integer (16, 32, 64, 128, 256, 512, 1024, 2048) | 128 | The default packet size for the remote interface. |
| define x25 parameters remDefWSize | Integer (1..7) | 2 | The default window size for the remote interface. |
| define x25 parameters resetCount | Integer (0..65535) | 1 | The R22 reset retransmission count. See RFC 1382. |
| define x25 parameters resetTimer | Integer | 180000 | The T22 reset timer, in milliseconds. See RFC 1382. |
| define x25 parameters restartCount | Integer (0..65535) | 1 | The R20 restart transmission counter. See RFC 1382. |
| define x25 parameters restartTimer | Integer | 180000 | The T20 restart timer, in milliseconds. See RFC 1382. |
| define x25 parameters versionSupported | x80, x84, x88 | x88 | Select the level of protocol compliance with the X.25 standards. |